Mitsubishi M37273MF-251SP Single-chip 8-bit cmos microcomputer with closed caption decoder and on-screen display controllerã ã ã ã Datasheet

MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
1. DESCRIPTION
The M37273M8-XXXSP and M37273MF-XXXSP are single-chip microcomputers designed with CMOS silicon gate technology. They
have a OSD, data slicer, and I2C-BUS interface, so it is useful for a
channel selection system for TV with a closed caption decoder.
The features of the M37273E8SP and M37273EFSP are similar to
those of the M37273M8-XXXSP and M37273MF-XXXSP except that
the chip has a built-in PROM which can be written electrically. The
difference between M37273M8-XXXSP and M37273MF-XXXSP are
the ROM size and RAM size. Accordingly, the following descriptions
will be for the M37273M8-XXXSP.
2. FEATURES
●Number of basic instructions .................................................... 71
●Memory size
ROM .............. 32K bytes
(M37273M8-XXXSP, M37273E8SP)
60K bytes
(M37273MF-XXXSP, M37273EFSP)
RAM ............... 1152 bytes
(M37273M8-XXXSP, M37273E8SP)
1472 bytes
(M37273MF-XXXSP, M37273EFSP)
(*ROM correction memory included)
●Minimum instruction execution time
......................................... 0.5 µs (at 8 MHz oscillation frequency)
●Power source voltage ................................................. 5 V ± 10 %
●Subroutine nesting ............................................. 128 levels (Max.)
●Interrupts ....................................................... 17 types, 16 vectors
●8-bit timers .................................................................................. 6
●Programmable I/O ports (Ports P0, P1, P2, P30, P31) ............. 26
●Input ports (Ports P50, P51) ........................................................ 2
●Output ports (Ports P52–P57,P6) .............................................. 14
●12 V withstand ports ................................................................... 6
●LED drive ports ........................................................................... 4
●Serial I/O ............................................................ 8-bit ✕ 1 channel
●Multi-master I2C-BUS interface .............................. 1 (2 systems)
●A-D comparator (6-bit resolution) ................................ 6 channels
●PWM output circuit ......................................................... 8-bit ✕ 6
●Power dissipation
In high-speed mode ......................................................... 165 mW
(at VCC = 5.5V, 8 MHz oscillation frequency, OSD on, and Data
slicer on)
In low-speed mode ......................................................... 0.33 mW
(at VCC = 5.5V, 32 kHz oscillation frequency)
●ROM correction function ................................................ 2 vectors
●Closed caption data slicer
Rev. 1.0
●OSD function
Display characters ................................... 32 characters ✕ 2 lines
(It is possible to display 3 lines or more by software)
Kinds of characters ........................................................ 254 kinds
Character display area ............................ CC mode: 16 ✕ 26 dots
OSD mode: 16 ✕ 20 dots
Kinds of character sizes ..................................... CC mode: 1 kind
OSD mode: 8 kinds
Kinds of character colors .................................. 8 colors (R, G, B)
Coloring unit ................... character, character background, raster
Display position
Horizontal: 128 levels
Vertical: 512 levels
Attribute ........................................................................................
CC mode: smooth italic, underline, flash, automatic solid space
OSD mode: border
Smoth roll-up
Window function
3. APPLICATION
TV with a closed caption decoder
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
TABLE OF CONTENTS
1. DESCRIPTION .......................................................................... 1
2. FEAUTURES ............................................................................. 1
3. APPLICATION ............................................................................ 1
4. PIN CONFIGURATION .............................................................. 3
5. FUNCTIONAL BLOCK DIAGRAM ............................................. 4
6. PERFORMANCE OVERVIEW ................................................... 5
7. PIN DESCRIPTION ................................................................... 7
8. FUNCTIONAL DESCRIPTION ................................................. 11
8.1 CENTRAL PROCESSING UNIT (CPU) .................... 11
8.2 MEMORY .................................................................. 12
8.3 INTERRUPTS ........................................................... 18
8.4 TIMERS ..................................................................... 23
8.5 SERIAL I/O ................................................................ 26
8.6 MULTI-MASTER I2C-BUS INTERFACE .................... 29
8.7 PWM OUTPUT CIRCUIT .......................................... 42
8.8 A-D COMPARATOR .................................................. 46
8.9 ROM CORRECTION FUNCTION ............................. 48
8.10 DATA SLICER ......................................................... 49
8.11 OSD FUNCTIONS ................................................... 60
8.11.1 Display Position ....................................... 65
8.11.2 Dot size .................................................... 69
8.11.3 Clock for OSD .......................................... 70
8.11.4 Field Determination Display ..................... 71
8.11.5 Memory For OSD ..................................... 73
8.11.6 Character Color ....................................... 77
8.11.7 Character Background Color ................... 77
8.11.8 OUT1, OUT2 Signals ............................... 78
8.11.9 Attribute .................................................... 79
8.11.10 Multiple Display ...................................... 84
8.11.11 Automatic Solid Space Function ............ 85
8.11.12 Window Function ................................... 86
8.11.13 OSD Output Pin Control ........................ 88
8.11.14 Raster Coloring Function ....................... 89
8.12. SOFTWARE RUNAWAY DETECT FUNCTION ..... 91
8.13. RESET CIRCUIT .................................................... 92
8.14. CLOCK GENERATING CIRCUIT ........................... 93
8.15. DISPLAY OSCILLATION CIRCUIT ........................ 96
8.16. AUTO-CLEAR CIRCUIT ......................................... 96
8.17. ADDRESSING MODE ............................................ 96
8.18. MACHINE INSTRUCTIONS ................................... 96
9. PROGRAMMING NOTES ........................................................ 96
10. ABSOLUTE MAXIMUM RATINGS ......................................... 97
11. RECOMMENDED OPERATING CONDITIONS ..................... 97
12. ELECTRIC CHARACTERISTICS .......................................... 98
13. A-D COMPARISON CHARACTERISTICS ........................... 100
14. MULTI-MASTER I2C-BUS BUS LINE CHARACTERISTICS ......... 100
15. PROM PROGRAMMING METHOD ..................................... 101
16. DATA REQUIRED FOR MASK ORDERS ............................ 102
17. MASK CONFIRMATION FORM ........................................... 103
18. MARK SPECIFICATION FORM ........................................... 109
19. ONE TIME PROM VERSIONS M37272E8SP/FP,
M37272EFSP MARKING ..................................................... 110
20. APPENDIX ........................................................................... 111
21. PACKAGE OUTLINE ........................................................... 136
Rev. 1.0
2
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
4. PIN CONFIGURATION
P50/HSYNC
1
52
P52/R
P51/VSYNC
2
51
P53/G
P54/B
P55/OUT1
3
50
4
49
P56
P02/PWM2
5
48
P63
6
47
45
P20/SCLK
P64
P21/SOUT
44
P65
43
P22/SIN
P66
M37273M8-XXXSP,M37273MF-XXXSP
M37273E8SP,M37273EFSP
P00/PWM0
P01/PWM1
P57
7
P03/PWM3
P60
8
P04/PWM4
10
P05/PWM5
P06/INT2/AD4
11
P61
P07/INT1
13
P62
15
P23/TIM3
P24/TIM2
P25
AVCC
16
HLF
VHOLD
20
21
32
9
12
14
17
18
19
46
42
41
40
P10/OUT2
P67
39
P11/SCL1
38
P12/SCL2
P13/SDA1
P14/SDA2
37
36
35
34
33
P15/AD1/INT3
P16/AD2
P17/AD3
P30/AD5
P31/AD6
CVIN
22
31
CNVSS
XIN
XOUT
23
30
24
29
25
28
RESET
P26/OSC1/XCIN
P27/OSC2/XCOUT
VSS
26
27
VCC
Outline 52P4B
Fig. 4.1 Pin Configuration (Top View)
Rev. 1.0
3
P1 (8)
33 34 35 36 37 38 39 41
I/O port P1
14 12 11 10 8 6 4 3
I/O port P0
I/O port P2
18 17 16 43 45 47
P2 (6)
Y (8)
A-D
comparator
26
23
22
SI/O
Timer 6
T6 (8)
Timer 5
T5 (8)
Timer 4
T4 (8)
Timer 3
T3 (8)
Timer 2
T2 (8)
Timer 1
T1 (8)
20
PWM
Instruction
register (8)
Instruction
decoder
28
OUT2
CRT
circuit
P10
29
P5 (8)
7 5 49 50 51 52 2 1
Synchronous signal input
Output ports P5 2–P57
Output for display Input ports P5 0, P51
40 42 44 46 48 15 13 9
P6 (8)
Output ports P6
Control signal
Data slicer
21
Pins for data slicer
CVIN VHOLD HLF
Timer count source
selection circuit
Multi-master
I2C-BUS
interface
TIM2
TIM3
I/O ports P3 0, P31
31 32
P3 (2)
Stack
pointer
S (8)
ROM
32 K bytes
X (8)
27
Index
register
PCL (8)
Program
counter
19
Index
register
P0 (8)
Accumulator
A (8)
Processor
status
register
PS (8)
Progam
counter
PC H (8)
Data bus
RAM
1152 bytes
Address bus
ROM
correction
circuit
Clock
generating
circuit
8-bit
arithmetic
and
logical unit
INT1
INT2
INT3
30
AD1–AD6
25
SDA2
SDA1
SCL2
SCL1
24
S IN
SCLK
SOUT
VSS CNV SS
PWM4
Reset input
RESET AVCC VCC
PWM5
XIN XOUT
PWM3
Clock input Clock output
OUT1
B
G
R
VSYNC
HSYNC
4
PWM2
PWM1
PWM0
I/O ports P2 6, P27
Clock input for OSD/ Clock output for OSD/
sub-clock input sub-clock output
OSC1/XCIN OSC2/XCOUT
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
5. FUNCTIONAL BLOCK DIAGRAM
Fig. 5.1 Functional Block Diagram of M37273
Rev. 1.0
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
6. PERFORMANCE OVERVIEW
Table 6.1 Performance Overview
Parameter
Number of basic instructions
Instruction execution time
Clock frequency
Memory size
Input/Output
ports
ROM M37273M8-XXXSP, M37273E8SP
M37273MF-XXXSP, M37273EFSP
RAM M37273M8-XXXSP, M37273E8SP
M37273MF-XXXSP, M37273EFSP
OSD ROM
OSD RAM
I/O
P0
P10–P17
I/O
P20–P27
I/O
8-bit ✕ 1 (P2 is CMOS input/output structure, however, N-channel opendrain output structure when P20 and 21 are used as serial output, can be
used as serial input/output pins, timer external clock input pins, OSD clock
input/output pin, sub-clock input/output pins)
P30, P31
I/O
2-bit ✕ 1 (CMOS input/output or N-channel open-drain output structure,
can be used as A-D input pins)
2-bit ✕ 1 (can be used as OSD input pins)
14-bit ✕ 1 (CMOS output structure, can be used as OSD output pins)
8-bit ✕ 1
1 (2 systems)
6 channels (6-bit resolution)
8-bit ✕ 6
8-bit timer ✕ 6
2 vectors
128 levels (maximum)
<17 types>
INT external interrupt ✕ 3, Internal timer interrupt ✕ 6, Serial I/O interrupt ✕
1, OSD interrupt ✕ 1, Multi-master I2C-BUS interface interrupt ✕ 1, Data
slicer interrupt ✕ 1, f(XIN)/4096 interrupt ✕ 1, VSYNC interrupt ✕ 1, BRK
instruction interrupt ✕ 1, reset ✕ 1
2 built-in circuits (externally connected to a ceramic resonator or a quartzcrystal oscillator)
Built-in
P50, P51
P52–P55,P6
Serial I/O
Multi-master I2C-BUS interface
A-D comparator
PWM output circuit
Timers
ROM correction function
Subroutine nesting
Interrupt
Clock generating circuit
Data slicer
Functions
71
0.5 µs (the minimum instruction execution time, at 8 MHz oscillation frequency)
8 MHz (maximum)
32K bytes
60K bytes
1152 bytes (ROM correction memory included)
1472 bytes (ROM correction memory included)
10K bytes
128 bytes
8-bit ✕ 1 (N-channel open-drain output structure, can be used as PWM
output pins, INT input pins, A-D input pin)
8-bit ✕ 1 (CMOS input/output structure, however, N-channel open-drain
output structure, when P11–P14 are used as multi-master I2C-BUS interface, can be used as OSD output pin, A-D input pins, INT input pin, multimaster I2C-BUS interface)
Input
Output
Rev. 1.0
5
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Table 6.2 Performance Overview (Continued)
OSD function
Parameter
Number of display characters
Dot structure
Kinds of characters
Kinds of character sizes
1 screen : 8
Character font coloring
Display position
Power source voltage
Power
In high-speed
dissipation mode
In low-speed
mode
In stop mode
Operating temperature range
Device structure
Package
OSD ON
OSD OFF
OSD OFF
Data slicer ON
Data slicer OFF
Data slicer OFF
Functions
32 characters ✕ 2 lines
CC mode: 16 ✕ 20 dots (character display area : 16 ✕ 20 dots)
OSD mode: 16 ✕ 20 dots
254 kinds
CC mode: 1 kinds
OSD mode: 8 kinds
1 screen: 8 kinds (per character unit)
Horizontal: 128 levels, Vertical: 512 levels
5V ± 10%
165 mW typ. ( at oscillation frequency f(XIN) = 8 MHz, fOSC = 27 MHz)
82.5 mW typ. ( at oscillation frequency f(XIN) = 8 MHz)
0.33 mW typ. ( at oscillation frequency f(XCIN) = 32 kHz, f(XIN) = stopped)
0.055 mW ( maximum )
–10 °C to 70 °C
CMOS silicon gate process
52-pin plastic molded DIP
Rev. 1.0
6
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
7. PIN DESCRIPTION
Table 7.1 Pin Description
Pin
Name
Input/
Output
Apply voltage of 5 V ± 10 % to (typical) VCC and AVCC, and 0 V to VSS.
VCC, AVCC, Power source
VSS
CNVSS
Functions
CNVSS
This is connected to VSS.
______
RESET
Reset input
Input
To enter the reset state, the reset input pin must be kept at a LOW for 2 µs or more (under
normal VCC conditions).
If more time is needed for the quartz-crystal oscillator to stabilize, this LOW condition should
be maintained for the required time.
XIN
Clock input
Input
XOUT
Clock output
This chip has an internal clock generating circuit. To control generating frequency, an
external ceramic resonator or a quartz-crystal oscillator is connected between pins XIN and
XOUT. If an external clock is used, the clock source should be connected to the XIN pin and
the XOUT pin should be left open.
P00/PWM0– I/O port P0
P05/PWM5,
P06/INT2/AD4,
P07/INT1
PWM output
Output
I/O
Port P0 is an 8-bit I/O port with direction register allowing each I/O bit to be individually
programmed as input or output. At reset, this port is set to input mode. The output structure
is N-channel open-drain output. (See note 1)
Output
Pins P00–P05 are also used as PWM output pins PWM0–PWM5 respectively. The output
structure is N-channel open-drain output.
External interrupt
input
Input
Pins P06 and P07 are also used as INT external interrupt input pins INT2 and INT1 respectively.
Analog input
Input
P06 pin is also used as analog input pin AD4.
P10/OUT2, I/O port P1
P11/SCL1,
P12/SCL2, OSD output
I/O
Output
Pins P10 is also used as OSD output pin OUT2. The output structure is CMOS output.
P13/SDA1,
P14/SDA2,
P15/AD1/INT3,
Multi-master
I2C-BUS interface
Analog input
Input
Pins P10, P15–P17 are also used as analog input pin AD8, AD1–AD3 respectively.
P16/AD2,
P17/AD3
P20/SCLK,
P21/SOUT,
P22/SIN,
P23/TIM3,
P24/TIM2,
P25,
P26/OSC1/
XCIN,
External interrupt
input
Input
P15 pin is also used as INT external interrupt input pin INT3.
P27/OSC2/
XCOUT
I/O
Port P1 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure is CMOS output. (See note 1)
Pins P11–P14 are used as SCL1, SCL2, SDA1 and SDA2 respectively, when multi-master
I2C-BUS interface is used. The output structure is N-channel open-drain output.
I/O port P2
I/O
Port P2 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure is CMOS output. (See note 1)
Serial I/O synchronous
clock input/output port
I/O
P20 pin is also used as serial I/O synchronous clock input/output pin SCLK. The output
structure is N-channel open-drain output.
Serial I/O data
output
I/O
P21 pin is also used as serial I/O data output pin SOUT. The output structure is open-drain
output.
Serial I/O data input
Input
P22 pin is also used as serial I/O data input pin SIN.
External clock
input for timer
Input
Pins P2 3 and P2 4 are also used as timer external clock input pins TIM3 and TIM2
respectively.
Clock input for OSD
Input
P26 pin is also used as OSD clock input pin OSC1. (See note 2)
Clock output for OSD
Output
Sub-clock input
Sub-clock output
Input
Output
P27 pin is also used as OSD clock input pin OSC2. The output structure is CMOS output.
(See note 2)
P26 pin is also used as sub-clock input pin XCIN.
P27 pin is also used as sub-clock output pin XCOUT.
Rev. 1.0
7
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Table 7.2 Pin Description (continued)
Pin
P30/AD5,
P31/AD6
Name
I/O port P3
Input/
Output
I/O
Functions
Ports P30 and P31 are a 2-bit I/O port and has basically the same functions as port 0.
The output structure can be selected either CMOS output or N-channel open-drain output
structure. (See notes 1, 3)
Analog input
Input
Pins P30 and P31 are also used as analog input pins AD5 and AD6 respectively.
P50/HSYNC, Input port P5
Input
Pin P50 and P51 are 2-bit input ports.
P51/VSYNC
HSYNC input
Input
Pin P50 is also used as HSYNC input. This is a horizontal synchronous signal input for OSD.
VSYNC input
Input
Pin P51 is also used as VSYNC input. This is a vertical synchronous signal input for OSD.
P52/R,
P53/G,
Output port P5
Output
Ports P52–P57 are a 6-bit output port. The output structure is CMOS output.
P54/B,
P55/OUT1
P56, P57
OSD output
Output
Pins P52–P55 are also used as OSD output pins R, G, B, OUT1 respectively. The output
structure is CMOS output.
P60–P67
Output port P6
Output
Port P6 is an 8-bit output port. The output structure is CMOS output.
CVIN
I/O for data slicer
VHOLD
HLF
Input
Input composite video signal through a capacitor.
Input
Connect a capacitor between VHOLD and Vss.
I/O
Connect a filter using of a capacitor and a resistor between HLF and Vss.
Notes 1: Port Pi (i = 0 to 3) has the port Pi direction register which can be used to program each bit as an input (“0”) or an output (“1”). The pins programmed as “1”
in the direction register are output pins. When pins are programmed as “0,” they are input pins. When pins are programmed as output pins, the output data
are written into the port latch and then output. When data is read from the output pins, the output pin level is not read but the data of the port latch is read.
This allows a previously-output value to be read correctly even if the output LOW voltage has risen, for example, because a light emitting diode was directly
driven. The input pins are in the floating state, so the values of the pins can be read. When data is written into the input pin, it is written only into the port
latch, while the pin remains in the floating state.
2: To switch output functions, set the raster color register and OSD control register. When pins P26 and P27 are used as the OSD clock input/output pins, set
the corresponding bits of the port P2 direction register to “0” (input mode).
3: To switch output structures, set bits 2 and 3 of the port P3 direction register, When “0,” CMOS output ; when “1,” N-channel open-drain output.
Rev. 1.0
8
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Ports P00–P05
N-channel open-drain output
Direction register
Ports P00–P05
Data bus
Port latch
Note : Each port is also used as follows :
P0 0–P05 : PWM0–PWM5
Ports P1, P2, P30, P31
Direction register
CMOS output
Data bus
Port latch
Ports P1, P2, P30, P31
Notes 1: Each port is also used as follows :
P10 : OUT2
P20 : SCLK
P11 : SCL1
P21 : SOUT
P12 : SCL2
P22 : SIN
P13 : SDA15
P23 : TIM3
P14 : SDA2
P24 : TIM2
P15 : AD1/INT3
P30 : AD5
P16 : AD2
P31 : AD6
P17 : AD3
2: The output structure of ports P30 and P31 can be selected either CMOS output or N-channel opendrain output structure (when selecting N-channel open-drain, it is the same with P06 and P07).
3: The output structure of ports P11–P14 is N-channel open-drain output when using as multi-master
I2C-BUS interface (it is the same with P06 and P07).
4: The output structure of ports P20 and P21 is N-channel open-drain output when using as serial
output (it is the same as P06 and P07).
Fig. 7.1 I/O Pin Block Diagram (1)
Rev. 1.0
9
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Ports P06, P07
N-channel open-drain output
Direction register
Ports P06, P07
Data bus
Note : Each port is also used
as follows :
P06 : INT2/AD4
P07 : INT1
Port latch
P50, P51
P52–P57, P6
CMOS input
Internal circuit
CMOS output
Ports P50, P51
Internal circuit
Note : Each pin is also used
as follows :
P50 : HSYNC
P51 : VSYNC
Ports P52–P57, P6
Note : Each pin is also used
as follows :
P52 : R
P53 : G
P54 : B
P55 : OUT1
Fig. 7.2 I/O Pin Block Diagram (2)
Rev. 1.0
10
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8. FUNCTIONAL DESCRIPTION
8.1 CENTRAL PROCESSING UNIT (CPU)
This microcomputer uses the standard 740 Family instruction set.
Refer to the table of 740 Family addressing modes and machine
instructions or the SERIES 740 <Software> User’s Manual for details on the instruction set.
Machine-resident 740 Family instructions are as follows:
The FST, SLW instruction cannot be used.
The MUL, DIV, WIT and STP instructions can be used.
8.1.1 CPU Mode Register
The CPU mode register contains the stack page selection bit and
internal system clock selection bit. The CPU mode register is allocated at address 00FB16.
CPU Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
1 1
CPU mode register (CM) [Address 00FB16]
B
Name
0, 1 Processor mode bits
(CM0, CM1)
2
Stack page selection
bit (CM2) (See note)
Functions
R W
1
RW
1
R W
0: LOW drive
1: HIGH drive
1
R W
0: Oscillating
1: Stopped
0
RW
0: XIN–XOUT selected
(high-speed mode)
1: XCIN–XCOUT selected
(high-speed mode)
0
RW
0
0
1
1
0: Single-chip mode
1:
0:
Not available
1:
0: 0 page
1: 1 page
3, 4 Fix these bits to “1.”
5 XCOUT drivability
selection bit (CM5)
6 Main Clock (XIN–XOUT)
stop bit
(CM6)
7 Internal system clock
selection bit
(CM7)
After reset R W
0
b1 b0
Note: This bit is set to “1” after the reset release.
Fig. 8.1.1 CPU Mode Register
Rev. 1.0
11
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.2 MEMORY
8.2.1 Special Function Register (SFR) Area
The special function register (SFR) area in the zero page contains
control registers such as I/O ports and timers.
8.2.6 Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
8.2.7 Zero Page
8.2.3 ROM
The 256 bytes from addresses 000016 to 00FF16 are called the zero
page area. The internal RAM and the special function registers (SFR)
are allocated to this area.
The zero page addressing mode can be used to specify memory and
register addresses in the zero page area. Access to this area with
only 2 bytes is possible in the zero page addressing mode.
ROM is used for storing user programs as well as the interrupt vector
area.
8.2.8 Special Page
8.2.2 RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
8.2.4 OSD RAM
RAM for display is used for specifying the character codes and colors to display.
The 256 bytes from addresses FF0016 to FFFF16 are called the special page area. The special page addressing mode can be used to
specify memory addresses in the special page area. Access to this
area with only 2 bytes is possible in the special page addressing
mode.
8.2.5 OSD ROM
8.2.9 ROM Correction Memory (RAM)
ROM for display is used for storing character data.
This is used as the program area for ROM correction.
¡M37273M8-XXXSP, M37273E8SP
000016
RAM
(1152 bytes)
00BF16
00C016
00FF16
010016
01FF16
020016
020F16
10000 16
Zero page
SFR1 area
SFR2 area
Not used
030016
032016
ROM correction function
Vector1: address 0300 16
Vector2: address 0320 16
05BF16
Not used
OSD RAM
(128 bytes)
iSee note j
Not used
080016
087F16
Not used
OSD ROM
(10K bytes)
140016
3BFF16
Not used
800016
ROM
(32K bytes)
FF0016
FFDE16
Interrupt vector area
FFFF16
Special page
1FFFF 16
Note: Refer to Table 8.11.3 OSD RAM.
Fig. 8.2.1 Memory Map (M37273M8-XXXSP, M37273E8SP)
Rev. 1.0
12
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
¡M37273MF-XXXSP, M37273EFSP
000016
RAM
(1472 bytes)
00BF 16
00C0 16
00FF16
010016
01FF16
020016
1000016
Zero page
SFR1 area
SFR2 area
020F16
Not used
Not used
030016
032016
ROM correction function
Vector 1: address 0300 16
Vector 2: address 0320 16
06FF16
Not used
OSD RAM
(128 bytes)
iSee note j
080016
087F16
Not used
OSD ROM
(10K bytes)
100016
11400 16
13BFF16
ROM
(60K bytes)
Not used
FF0016
FFDE16
Interrupt vector area
FFFF16
Special page
1FFFF 16
Note: Refer to Table 8.11.3 OSD RAM.
Fig. 8.2.2 Memory Map (M37273MF-XXXSP, M37273EFSP)
Rev. 1.0
13
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
■ SFR1 Area (addresses C016 to DF16)
<Bit allocation>
<State immediately after reset>
:
Name
0 : “0” immediately after reset
Function bit
:
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix this bit to “0”
(do not write “1”)
1 : Fix this bit to “1”
(do not write “0”)
Address
C016
C116
C216
C316
C416
C516
C616
C716
C816
C916
CA16
CB16
CC16
CD16
CE16
CF16
D016
D116
D216
D316
D416
D516
D616
D716
D816
D916
DA16
DB16
DC16
DD16
DE16
DF16
Register
Bit allocation
b7
State immediately after reset
b0 b7
Port P0 (P0)
Port P0 direction register (D0)
Port P1 (P1)
Port P1 direction register (D1)
Port P2 (P2)
Port P2 direction register (D2)
P31 P30
Port P3 (P3)
T3SC
Port P3 direction register (D3)
0
P31CP30C P31D P30D
Port P5 (P5)
OSD port control register (PF)
Port P6 (P6)
PF7
PF5 PF4 PF3 PF2
0
0
Caption data register 3 (CD3)
CDL27 CDL26 CDL25 CDL24 CDL23CDL22 CDL21 CDL20
Caption data register 4 (CD4)
CDH27CDH26CDH25CDH24CDH23CDH22CDH21CDH20
OSD control register (OC)
0
OC6 OC5 OC4 OC3 OC2 OC1 OC0
HP 6 HP 5 HP 4 HP 3 HP 2 HP 1 HP 0
Horizontal position register (HP)
Block control register 1 (BC1)
BC17 BC16 BC15 BC14 BC13BC12 BC11 BC10
Block control register 2 (BC2)
BC27 BC26 BC25 BC24 BC23BC22 BC21 BC20
Vertical position register 1 (VP1)
VP17 VP16 VP15 VP14 VP13 VP12 VP11 VP10
Vertical position register 2 (VP2)
VP27 VP26 VP25 VP24 VP23 VP22 VP21 VP20
Window register 1 (WN1)
WN17 WN16 WN15 WN14 WN13WN12 WN11 WN10
Window register 2 (WN2)
WN27 WN26 WN25 WN24 WN23WN22 WN21 WN20
I/O polarity control register (PC)
Raster color register (RC)
0
RC7
P C6 P C5 P C4 P C3 P C2 P C1 P C0
0
Interrupt input polarity control register (RE)
0
RC4 RC3 RC2 RC1 RC0
INT3 INT2 INT1
0016
0016
0016 (See note 1)
0
0
b0
?
0016
?
0016
?
0016
0 0 0 ? ?
0016
?
?
?
0016
0016
?
?
?
0016
0016
?
?
?
?
?
?
4016
0016
?
?
0016
0016
0016
0016 (See note 2)
Notes 1: This is only M37273MF-XXXSP and M37273EFSP.
2: As for M37273M8-XXXSP and M37273E8SP, the reset value is ? (indeterminate).
Fig. 8.2.3 Memory Map of Special Function Register 1 (SFR1) (1)
Rev. 1.0
14
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
■ SFR1 Area (addresses E016 to FF16)
<Bit allocation>
<State immediately after reset>
:
Name
:
0 : “0” immediately after reset
Function bit
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix this bit to “0”
(do not write “1”)
1 : Fix this bit to “1”
(do not write “0”)
Address
E016
E116
E216
E316
E416
E516
E616
E716
E816
E916
EA16
EB16
EC16
ED16
EE16
EF16
F016
F116
F216
F316
F416
F516
F616
F716
F816
F916
FA16
FB16
FC16
FD16
FE16
FF16
Register
Data slicer control register 1 (DSC1)
Bit allocation
b7
0
Data slicer control register 2 (DSC2)
1
0
1
0
0
State immediately after reset
b0 b7
DSC12DSC11DSC10
1
DSC25 DSC24 DSC23
DSC20
Caption data register 1 (CD1)
CDL17 CDL16 CDL15 CDL14 CDL13 CDL12 CDL11 CDL10
Caption data register 2 (CD2)
CDH17CDH16CDH15CDH14CDH13CDH12CDH11CDH10
Clock run-in detect register (CRD)
Data clock position register (DPS)
CRD7 CRD6 CRD5 CRD4 CRD3
Caption position register (CPS)
CPS7 CPS6 CPS5 CPS4 CPS3 CPS2 CPS1 CPS0
DPS7 DPS6 DPS5 DPS4 DPS3
0
1
?
0
?
0
0
?
0
0
0
0
0
0
0
Data slicer test register 2
Data slicer test register 1
Synchronous signal counter register (HC)
Serial I/O register (SIO)
Serial I/O mode register (SM)
0
HC5 HC4 HC3 HC2 HC1 HC0
0
SM6 SM5
A-D control register 1 (AD1)
SM3 SM2 SM1 SM0
ADC14
A-D control register 2 (AD2)
ADC12 ADC11 ADC10
ADC25 ADC24 ADC23 ADC22ADC21 ADC20
Timer 5 (T5)
Timer 6 (T6)
Timer 1 (T1)
Timer 2 (T2)
Timer 3 (T3)
Timer 4 (T4)
Timer mode register 1 (TM1)
TM17 TM16 TM15 TM14 TM13 TM12 TM11 TM10
Timer mode register 2 (TM2)
TM27 TM26 TM25 TM24 TM23 TM22 TM21 TM20
I2C data shift register (S0)
I2C address register (S0D)
I2C status register (S1)
I2C control register (S1D)
D7
D6
D5
D4
D3
D2
D1
D0
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW
MST TRX BB
PIN
AL AAS AD0 LRB
BSEL1 BSEL0 10BIT ALS ESO BC2 BC1 BC0
SAD
ACK ACK FAST CCR4 CCR3 CCR2 CCR1 CCR0
BIT MODE
I2C clock control register (S2)
CM7 CM6 CM5 1
1 CM2 0 0
CPU mode register (CPUM)
IN3R VSCR OSDRTM4R TM3R TM2R TM1R
Interrupt request register 1 (IREQ1)
Interrupt request register 2 (IREQ2)
Interrupt control register 1 (ICON1)
Interrupt control register 2 (ICON2)
0
TM56RIICR IN
C2KR0 CKR S1R DSR IN1R
IN3E VSCEOSDE TM4E TM3E TM2E TM1E
TM56CTM56E
IICE IN2E CKE S1E DSE IN1E
0016
0 ?
0016
0016
0016
0916
0 0
0016
0016
0016
?
0016
? 0
0016
0716
FF16
FF16
0716
FF16
0716
0016
0016
?
0016
1 0
0016
0016
3C16
0016
0016
0016
0016
b0
?
0
?
0
0
0
0
0
0
0
0
?
Fig. 8.2.4 Memory Map of Special Function Register 1 (SFR1) (2)
Rev. 1.0
15
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
■ SFR2 Area (addresses 20016 to 20F16)
<Bit allocation>
<State immediately after reset>
:
Name
:
0 : “0” immediately after reset
Function bit
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix this bit to “0”
(do not write “1”)
1 : Fix this bit to “1”
(do not write “0”)
Address
Register
Bit allocation
b7
State immediately after reset
b0 b7
20016 PWM0 register (PWM0)
20116 PWM1 register (PWM1)
20216
20316
20416
20516
20616
20716
20816
20916
20A16
20B16
20C16
20D16
20E16
20F16
?
?
?
?
?
?
?
?
PWM2 register (PWM2)
PWM3 register (PWM3)
PWM4 register (PWM4)
PWM5 register (PWM5)
0016
0016
PWM mode register 1 (PM1)
PWM mode register 2 (PM2)
ROM correction address 1 (high-order)
PM13
0
0
PM10
PM25 PM24 PM23 PM22 PM21 PM20
ROM correction address 1 (low-order)
ROM correction address 2 (high-order)
ROM correction address 2 (low-order)
ROM correction enable register (RCR)
b0
RC1 RC0
?
?
?
? 0
0016
0016
0016
0016
0016
0016
?
?
?
0
Fig. 8.2.5 Memory Map of Special Function Register 2 (SFR2)
Rev. 1.0
16
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
<State immediately after reset>
<Bit allocation>
:
Name
0 : “0” immediately after reset
Function bit
:
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix to this bit to “0”
(do not write to “1”)
1 : Fix to this bit to “1”
(do not write to “0”)
Register
Bit allocation
State immediately after reset
b0 b7
b7
Processor status register (PS)
Program counter (PCH)
N
V
T
B
D
I
Z
C
Program counter (PCL)
b0
? ? ? ? ? 1 ? ?
Contents of address FFFF16
Contents of address FFFE16
Fig. 8.2.6 Internal State of Processor Status Register and Program Counter at Reset
Rev. 1.0
17
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.3 INTERRUPTS
Interrupts can be caused by 17 different sources consisting of 4 external, 11 internal, 1 software, and reset. Interrupts are vectored interrupts with priorities as shown in Table 8.3.1. Reset is also included
in the table because its operation is similar to an interrupt.
When an interrupt is accepted,
① The contents of the program counter and processor status register are automatically stored into the stack.
➁ The interrupt disable flag I is set to “1” and the corresponding
interrupt request bit is set to “0.”
➂ The jump destination address stored in the vector address enters
the program counter.
Other interrupts are disabled when the interrupt disable flag is set to
“1.”
All interrupts except the BRK instruction interrupt have an interrupt
request bit and an interrupt enable bit. The interrupt request bits are
in interrupt request registers 1 and 2 and the interrupt enable bits are
in interrupt control registers 1 and 2. Figures 8.3.2 to 8.3.6 show the
interrupt-related registers.
Interrupts other than the BRK instruction interrupt and reset are accepted when the interrupt enable bit is “1,” interrupt request bit is “1,”
and the interrupt disable flag is “0.” The interrupt request bit can be
set to “0” by a program, but not set to “1.” The interrupt enable bit can
be set to “0” and “1” by a program.
Reset is treated as a non-maskable interrupt with the highest priority.
Figure 8.3.1 shows interrupt control.
8.3.1 Interrupt Causes
(1) VSYNC, OSD interrupts
The VSYNC interrupt is an interrupt request synchronized with
the vertical sync signal.
The OSD interrupt occurs after character block display to the
CRT is completed.
(2) INT1 to INT3 external interrupts
The INT1 to INT3 interrupts are external interrupt inputs, the system detects that the level of a pin changes from LOW to HIGH or
from HIGH to LOW, and generates an interrupt request. The input active edge can be selected by bits 3 to 5 of the interrupt
input polarity register (address 00DC16) : when this bit is “0,” a
change from LOW to HIGH is detected; when it is “1,” a change
from HIGH to LOW is detected. Note that both bits are cleared to
“0” at reset.
(3) Timers 1 to 4 interrupts
An interrupt is generated by an overflow of timers 1 to 4.
Table 8.3.1 Interrupt Vector Addresses and Priority
Priority
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Interrupt Source
Reset
OSD interrupt
INT1 external interrupt
Data slicer interrupt
Serial I/O interrupt
Timer 4 interrupt
f(XIN)/4096 interrupt
VSYNC interrupt
Timer 3 interrupt
Timer 2 interrupt
Timer 1 interrupt
INT3 external interrupt
INT2 external interrupt
Multi-master I2C-BUS interface interrupt
Timer 5 • 6 interrupt
BRK instruction interrupt
Vector Addresses
FFFF16, FFFE16
FFFD16, FFFC16
FFFB16, FFFA16
FFF916, FFF816
FFF716, FFF616
FFF516, FFF416
FFF316, FFF216
FFF116, FFF016
FFEF16, FFEE16
FFED16, FFEC16
FFEB16, FFEA16
FFE916, FFE816
FFE716, FFE616
FFE516, FFE416
FFE316, FFE216
FFDF16, FFDE16
Remarks
Non-maskable
Active edge selectable
Active edge selectable
Active edge selectable
Source switch by software (see note)
Non-maskable
Note: Switching a source during a program causes an unnecessary interrupt. Therefore, set a source at initializing of program.
Rev. 1.0
18
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(4) Serial I/O interrupt
This is an interrupt request from the clock synchronous serial I/O
function.
(5) f(XIN)/4096 interrupt
The f (XIN)/4096 interrupt occurs regularly with a f(XIN)/4096 period. Set bit 0 of the PWM mode register 1 to “0.”
Interrupt request bit
Interrupt enable bit
Interrupt disable flag I
(6) Data slicer interrupt
An interrupt occurs when slicing data is completed.
(7) Multi-master
I2C-BUS
BRK instruction
Reset
interface interrupt
Interrupt
request
This is an interrupt request related to the multi-master I2C-BUS
interface.
(8) Timer 5 • 6 interrupt
An interrupt is generated by an overflow of timer 5 or 6. Their
priorities are same, and can be switched by software.
Fig. 8.3.1 Interrupt Control
(9) BRK instruction interrupt
This software interrupt has the least significant priority. It does
not have a corresponding interrupt enable bit, and it is not affected by the interrupt disable flag I (non-maskable).
Rev. 1.0
19
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Interrupt Request Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt request register 1 (IREQ1) [Address 00FC16]
B
Name
0
Functions
After reset R W
0 : No interrupt request issued
Timer 1 interrupt
request bit (TM1R) 1 : Interrupt request issued
Timer 2 interrupt
0 : No interrupt request issued
request bit (TM2R) 1 : Interrupt request issued
Timer 3 interrupt
0 : No interrupt request issued
request bit (TM3R) 1 : Interrupt request issued
Timer 4 interrupt
0 : No interrupt request issued
request bit (TM4R) 1 : Interrupt request issued
OSD interrupt request 0 : No interrupt request issued
bit (OSDR)
1 : Interrupt request issued
VSYNC interrupt
0 : No interrupt request issued
request bit (VSCR) 1 : Interrupt request issued
INT3 external interrupt 0 : No interrupt request issued
request bit (VSCR) 1 : Interrupt request issued
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
1
2
3
4
5
6
7
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R —
✽: “0” can be set by software, but “1” cannot be set.
Fig. 8.3.2 Interrupt Request Register 1
Interrupt Request Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
Interrupt request register 2 (IREQ2) [Address 00FD16]
B
Name
0
INT1 external interrupt
request bit (INIR)
Data slicer interrupt
request bit (DSR)
1
2
Serial I/O interrupt
request bit (S1R)
3 f(XIN)/4096 interrupt
request bit (CKR)
4 INT2 external interrupt
request bit (IN2R)
5 Multi-master I2C-BUS
interrupt request bit (IICR)
6 Timer 5 • 6 interrupt
request bit (TM56R)
7
Functions
After reset R W
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0 : No interrupt request issued
1 : Interrupt request issued
0
R ✽
0
R W
Fix this bit to “0.”
✽: “0” can be set by software, but “1” cannot be set.
Fig. 8.3.3 Interrupt Request Register 2
Rev. 1.0
20
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Interrupt Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt control register 1 (ICON1) [Address 00FE16]
B
Name
0 Timer 1 interrupt
enable bit (TM1E)
1 Timer 2 interrupt
enable bit (TM2E)
2 Timer 3 interrupt
enable bit (TM3E)
3 Timer 4 interrupt
enable bit (TM4E)
4 OSD interrupt enable bit
(OSDE)
5 VSYNC interrupt enable
bit (VSCE)
6 INT3 external interrupt
enable bit (IN3E)
Functions
After reset R W
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
7 Nothing is assigned. This bit is a write disable
bit. When this bit is read out, the value is “0.”
0
R W
0
R W
0
R W
0
R W
0
R W
0
R W
0
R W
0
R —
Fig. 8.3.4 Interrupt Control Register 1
Interrupt Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt control register 2 (ICON2) [Address 00FF16]
After reset R W
B
Name
Functions
0
INT1 external interrupt
enable bit (IN1E)
Data slicer interrupt
enable bit (DSE)
Serial I/O interrupt
enable bit (S1E)
f(XIN)/4096 interrupt
enable bit (CKE)
INT2 external interrupt
enable bit (IN2E)
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0
R W
0
R W
0
R W
0
R W
0
R W
5 Multi-master I2C-BUS
interface interrupt enable
bit (IICE)
6 Timer 5 • 6 interrupt
enable bit (TM56E)
0 : Interrupt disabled
1 : Interrupt enabled
0
R W
0 : Interrupt disabled
1 : Interrupt enabled
0
R W
7 Timer 5 • 6 interrupt
switch bit (TM56C)
0 : Timer 5
1 : Timer 6
0
R W
1
2
3
4
Fig. 8.3.5 Interrupt Control Register 2
Rev. 1.0
21
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Interrupt Input Polarity Register
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt input polarity register (RE) [Address 00DC 16]
B
Name
Functions
After reset
R W
0
INT1 polarity switch bit
(INT1)
0 : Positive polarity
1 : Negative polarity
0
R W
4
INT2 polarity switch bit
(INT2)
0 : Positive polarity
1 : Negative polarity
0
R W
5
INT3 polarity switch bit
(INT3)
0 : Positive polarity
1 : Negative polarity
0
R W
0
R —
4
to
7
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
Fig. 8.3.6 Interrupt Input Polarity Register
Rev. 1.0
22
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.4 TIMERS
8.4.5 Timer 5
This microcomputer has 6 timers: timer 1, timer 2, timer 3, timer 4,
timer 5, and timer 6. All timers are 8-bit timers with the 8-bit timer
latch. The timer block diagram is shown in Figure 8.4.3.
All of the timers count down and their divide ratio is 1/(n+1), where n
is the value of timer latch. By writing a count value to the corresponding timer latch (addresses 00F016 to 00F316 : timers 1 to 4, addresses
00EE16 and 00EF16 : timers 5 and 6), the value is also set to a timer,
simultaneously.
The count value is decremented by 1. The timer interrupt request bit
is set to “1” by a timer overflow at the next count pulse, after the
count value reaches “0016”.
Timer 5 can select one of the following count sources:
• f(XIN)/16 or f(XCIN)/16
• Timer 2 overflow signal
• Timer 4 overflow signal
The count source of timer 3 is selected by setting bit 6 of timer mode
register 1 (address 00F416) and bit 7 of the timer mode register 2
(address 00F516). When overflow of timer 2 or 4 is a count source
for timer 5, either timer 2 or 4 functions as an 8-bit prescaler. Either
f(XIN) or f(XCIN) is selected by bit 7 of the CPU mode register.
Timer 5 interrupt request occurs at timer 5 overflow.
8.4.6 Timer 6
8.4.1 Timer 1
Timer 1 can select one of the following count sources:
• f(XIN)/16 or f(XCIN)/16
• f(XIN)/4096 or f(XCIN)/4096
• External clock from the TIM2 pin
The count source of timer 1 is selected by setting bits 5 and 0 of
timer mode register 1 (address 00F416). Either f(XIN) or f(XCIN) is
selected by bit 7 of the CPU mode register.
Timer 1 interrupt request occurs at timer 1 overflow.
8.4.2 Timer 2
Timer 2 can select one of the following count sources:
• f(XIN)/16 or f(XCIN)/16
• Timer 1 overflow signal
• External clock from the TIM2 pin
The count source of timer 2 is selected by setting bits 4 and 1 of
timer mode register 1 (address 00F416). Either f(XIN) or f(XCIN) is
selected by bit 7 of the CPU mode register. When timer 1 overflow
signal is a count source for the timer 2, the timer 1 functions as an 8bit prescaler.
Timer 2 interrupt request occurs at timer 2 overflow.
8.4.3 Timer 3
Timer 3 can select one of the following count sources:
• f(XIN)/16 or f(XCIN)/16
• f(XCIN)
• External clock from the TIM3 pin
The count source of timer 3 is selected by setting bit 0 of timer mode
register 2 (address 00F516) and bit 6 at address 00C716. Either f(XIN)
or f(XCIN) is selected by bit 7 of the CPU mode register.
Timer 3 interrupt request occurs at timer 3 overflow.
Timer 6 can select one of the following count sources:
• f(XIN)/16 or f(XCIN)/16
• Timer 5 overflow signal
The count source of timer 6 is selected by setting bit 7 of the timer
mode register 1 (address 00F416). Either f(XIN) or f(XCIN) is selected
by bit 7 of the CPU mode register. When timer 5 overflow signal is a
count source for timer 6, the timer 5 functions as an 8-bit prescaler.
Timer 6 interrupt request occurs at timer 6 overflow.
At reset, timers 3 and 4 are connected by hardware and “FF16” is
automatically set in timer 3; “0716” in timer 4. The f(XIN) ✽ /16 is selected as the timer 3 count source. The internal reset is released by
timer 4 overflow in this state and the internal clock is connected.
At execution of the STP instruction, timers 3 and 4 are connected by
hardware and “FF16” is automatically set in timer 3; “0716” in timer 4.
However, the f(XIN) ✽ /16 is not selected as the timer 3 count source.
So set both bit 0 of timer mode register 2 (address 00F5 16) and bit 6
at address 00C716 to “0” before the execution of the STP instruction
(f(XIN) ✽ /16 is selected as timer 3 count source). The internal STP
state is released by timer 4 overflow in this state and the internal
clock is connected.
As a result of the above procedure, the program can start under a
stable clock.
✽: When bit 7 of the CPU mode register (CM7) is “1,” f(XIN) becomes
f(XCIN).
The timer-related registers is shown in Figures 8.4.1 and 8.4.2.
8.4.4 Timer 4
Timer 4 can select one of the following count sources:
• f(XIN)/16 or f(XCIN)/16
• f(XIN)/2 or f(XCIN)/2
• f(XCIN)
The count source of timer 3 is selected by setting bits 1 and 4 of the
timer mode register 2 (address 00F516). Either f(XIN) or f(XCIN) is
selected by bit 7 of the CPU mode register. When timer 3 overflow
signal is a count source for the timer 4, the timer 3 functions as an 8bit prescaler.
Timer 4 interrupt request occurs at timer 4 overflow.
Rev. 1.0
23
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Timer Mode Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Timer mode register 1 (TM1) [Address 00F4 16]
B
Name
0 Timer 1 count source
selection bit 1 (TM10)
After reset R W
Functions
0: f(XIN)/16 or f(X CIN)/16 (See note)
0
R W
1: Count source selected by bit 5 of TM1
1
Timer 2 count source
selection bit 1 (TM11)
0: Count source selected by bit 4 of TM1
1: External clock from TIM2 pin
0
R W
2
Timer 1 count
stop bit (TM12)
0: Count start
1: Count stop
0
R W
3
Timer 2 count stop
bit (TM13)
0: Count start
1: Count stop
0
R W
4
Timer 2 count source
selection bit 2
(TM14)
0: f(XIN)/16 or f(X CIN)/16 (See note)
1: Timer 1 overflow
0
R W
5
Timer 1 count source
selection bit 2 (TM15)
0: f(XIN)/4096 or f(X CIN)/4096 (See note)
1: External clock from TIM2 pin
0
R W
6
Timer 5 count source
selection bit 2 (TM16)
0: Timer 2 overflow
1: Timer 4 overflow
0
R W
7
Timer 6 internal count
source selection bit
(TM17)
0: f(XIN)/16 or f(X CIN)/16 (See note)
1: Timer 5 overflow
0
R W
Note: Either f(X IN) or f(X CIN) is selected by bit 7 of the CPU mode register.
Fig. 8.4.1 Timer Mode Register 1
Timer Mode Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Timer mode register 2 (TM2) [Address 00F5 16]
B
Name
0 Timer 3 count source
selection bit (TM20)
1, 4 Timer 4 count source
selection bits
(TM21, TM24)
Functions
After reset R W
(b6 at address 00C7 16)
0
0
1
1
b0
0 : f(X IN)/16 or f(X CIN)/16 (See note)
1 : f(X CIN)
0:
1 : External clock from TIM3 pin
b4
0
0
1
1
b1
0 : Timer 3 overflow signal
1 : f(X IN)/16 or f(X CIN)/16 (See note)
0 : f(X IN)/2 or f(X CIN)/2 (See note)
1 : f(X CIN)
0
R W
0
R W
2
Timer 3 count
stop bit (TM22)
0: Count start
1: Count stop
0
R W
3
Timer 4 count stop bit
(TM23)
0: Count start
1: Count stop
0
R W
5
Timer 5 count stop bit
(TM25)
0: Count start
1: Count stop
0
R W
6
Timer 6 count stop bit
(TM26)
0: Count start
1: Count stop
0
R W
7
Timer 5 count source
selection bit 1
(TM27)
0: f(XIN)/16 or f(X CIN)/16 (See note)
1: Count source selected by bit 6
of TM1
0
R W
Note: Either f(X IN) or f(X CIN) is selected by bit 7 of the CPU mode register.
Fig. 8.4.2 Timer Mode Register 2
Rev. 1.0
24
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Data bus
8
XCIN
CM7
TM15
Timer 1 latch (8)
1/4096
8
X IN
1/2
1/8
TM10
TM12
Timer 1
interrupt request
Timer 1 (8)
8
TM14
8
Timer 2 latch (8)
8
TIM2
Timer 2
interrupt request
Timer 2 (8)
TM11
TM13
8
8
FF16
T3SC
Reset
STP instruction
Timer 3 latch (8)
8
Timer 3
interrupt request
Timer 3 (8)
TIM3
TM20
TM22
8
8
TM21
07 16
Timer 4 latch (8)
8
Timer 4
interrupt request
Timer 4 (8)
TM21
TM24
TM23
8
8
TM16
Timer 5 latch (8)
Selection gate: Connected to
black side at
reset
8
Timer 5
interrupt request
Timer 5 (8)
TM1 : Timer mode register 1
TM2 : Timer mode register 2
T3SC : Timer 3 count source
switch bit (address 00C7 16)
CM : CPU mode register
TM27
TM25
8
8
Timer 6 latch (8)
8
Timer 6
interrupt request
Timer 6 (8)
TM17
TM26
8
Notes 1: HIGH pulse width of external clock inputs TIM2 and TIM3 needs 4 machine cycles or more.
2: When the external clock source is selected, timers 1, 2, and 3 are counted at a rising edge of input signal.
3: In the stop mode or the wait mode, external clock inputs TIM2 and TIM3 cannot be used.
Fig. 8.4.3 Timer Block Diagram
Rev. 1.0
25
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.5 SERIAL I/O
This microcomputer has a built-in serial I/O which can either transmit
or receive 8-bit data serially in the clock synchronous mode.
The serial I/O block diagram is shown in Figure 8.5.1. The synchronous clock I/O pin (SCLK), and data output pin (SOUT) also function
as port P4, data input pin (SIN) also functions as port P20–P22.
Bit 3 of the serial I/O mode register (address 00EB16) selects whether
the synchronous clock is supplied internally or externally (from the
SCLK pin). When an internal clock is selected, bits 1 and 0 select
whether f(XIN) or f(XCIN) is divided by 8, 16, 32, or 64. To use the SIN
pin for serial I/O, set the corresponding bit of the port P2 direction
register (address 00C516) to “0.”
The operation of the serial I/O is described below. The operation of
the serial I/O differs depending on the clock source; external clock or
internal clock.
XCIN
1/2
XIN
1/2
Data bus
Frequency divider
1/2
CM7
1/2
1/4 1/8
SM1
SM0
SM2
Synchronous
circuit
1/16
S
CM : CPU mode register
SM : Serial I/O mode register
P20 Latch
SM3
SCLK
Selection gate: Connect to
black side at
reset.
Serial I/O
interrupt request
Serial I/O counter (8)
P21 Latch
SM3
SOUT
SM5 : LSB
MSB
(See note)
SIN
Serial I/O shift register (8)
SM6
8
Note : When the data is set in the serial I/O register (address 00EA 16), the register functions as the serial I/O shift register.
Fig. 8.5.1 Serial I/O Block Diagram
Rev. 1.0
26
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Internal clock : The serial I/O counter is set to “7” during the write
cycle into the serial I/O register (address 00EA16), and the transfer
clock goes HIGH forcibly. At each falling edge of the transfer clock
after the write cycle, serial data is output from the SOUT pin. Transfer
direction can be selected by bit 5 of the serial I/O mode register. At
each rising edge of the transfer clock, data is input from the SIN pin
and data in the serial I/O register is shifted 1 bit.
After the transfer clock has counted 8 times, the serial I/O counter
becomes “0” and the transfer clock stops at HIGH. At this time the
interrupt request bit is set to “1.”
External clock : The an external clock is selected as the clock source,
the interrupt request is set to “1” after the transfer clock has been
counted 8 counts. However, transfer operation does not stop, so the
clock should be controlled externally. Use the external clock of 1 MHz
or less with a duty cycle of 50%.
The serial I/O timing is shown in Figure 8.5.2. When using an external clock for transfer, the external clock must be held at HIGH for
initializing the serial I/O counter. When switching between an internal clock and an external clock, do not switch during transfer. Also,
be sure to initialize the serial I/O counter after switching.
Notes 1: On programming, note that the serial I/O counter is set by writing to
the serial I/O register with the bit managing instructions, such as SEB
and CLB.
2: When an external clock is used as the synchronous clock, write transmit data to the serial I/O register when the transfer clock input level is
HIGH.
Synchronous clock
Transfer clock
Serial I/O register
write signal
(Note)
Serial I/O output
SOUT
D0
D1
D2
D3
D4
D5
D6
D7
Serial I/O input
SIN
Interrupt request bit is set to “1”
Note : When an internal clock is selected, the SOUT pin is at high-impedance after transfer is completed.
Fig. 8.5.2 Serial I/O Timing (for LSB first)
Rev. 1.0
27
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Serial I/O Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0
0
Serial I/O mode register (SM) [Address 00EB16]
B
Name
0, 1 Internal synchronous
clock selection bits
(SM0, SM1)
After reset R W
Functions
0
R W
b1 b0
0 0: f(XIN)/4 or f(XCIN)/4
0 1: f(XIN)/16 or f(XCIN)/16
1 0: f(XIN)/32 or f(XCIN)/32
1 1: f(XIN)/64 or f(XCIN)/64
2
Synchronous clock
selection bit (SM2)
0: External clock
1: Internal clock
0
R W
3
Port function
selection bit (SM3)
0: P20, P21
1: SCLK, SOUT
0
R W
0
R W
0
R W
6 Transfer clock input
0: Input signal from SIN pin
pin selection bit (SM6) 1: Input signal from SOUT pin
0
R W
7 Fix this bit to “0.”
0
R W
4 Fix this bit to “0.”
5
Transfer direction
selection bit (SM5)
0: LSB first
1: MSB first
Fig. 8.5.3 Serial I/O Mode Register
Rev. 1.0
28
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6 MULTI-MASTER I2C-BUS INTERFACE
Table 8.6.1 Multi-master I2C-BUS Interface Functions
The multi-master I2C-BUS interface is a serial communications circuit, conforming to the Philips I2C-BUS data transfer format. This
interface, offering both arbitration lost detection and a synchronous
functions, is useful for the multi-master serial communications.
Figure 8.6.1 shows a block diagram of the multi-master I2C-BUS interface and Table 8.6.1 shows multi-master I2C-BUS interface functions.
This multi-master I2C-BUS interface consists of the I2C address register, the I2C data shift register, the I2C clock control register, the I2C
control register, the I2C status register and other control circuits.
Item
Format
Communication mode
SCL clock frequency
Function
In conformity with Philips I2C-BUS
standard:
10-bit addressing format
7-bit addressing format
High-speed clock mode
Standard clock mode
In conformity with Philips I2C-BUS
standard:
Master transmission
Master reception
Slave transmission
Slave reception
16.1 kHz to 400 kHz (at φ = 4 MHz)
φ : System clock = f(XIN)/2
Note : We are not responsible for any third party’s infringement of patent rights
or other rights attributable to the use of the control function (bits 6 and 7
of the I2C control register at address 00F916) for connections between
the I2C-BUS interface and ports (SCL1, SCL2, SDA1, SDA2).
b7
I2C address register (S0D) b0
Interrupt
generating
circuit
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW
Interrupt
request signal
(IICIRQ)
Address comparator
Serial
data
(SDA)
Noise
elimination
circuit
Data
control
circuit
b7
b0
2
I C data shift register
b7
S0
b0
AL AAS AD0 LRB
MST TRX BB PIN
2
AL
circuit
I C status
register (S1)
Internal data bus
BB
circuit
Serial
clock
(SCL)
Noise
elimination
circuit
Clock
control
circuit
b7
ACK
b0
ACK FAST CCR4 CCR3 CCR2 CCR1 CCR0
MODE
BIT
I2C clock control register (S2)
Clock division
b7
BSEL1 BSEL0 10BIT
SAD
b0
ALS
ESO BC2 BC1 BC0
I2C control register (S1D)
System clock (φ)
Bit counter
Fig. 8.6.1 Block Diagram of Multi-master I2C-BUS Interface
Rev. 1.0
29
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.1 I2C Data Shift Register
The I2C data shift register (S0 : address 00F6 16) is an 8-bit shift
register to store receive data and write transmit data.
When transmit data is written into this register, it is transferred to the
outside from bit 7 in synchronization with the SCL clock, and each
time one-bit data is output, the data of this register are shifted one bit
to the left. When data is received, it is input to this register from bit 0
in synchronization with the SCL clock, and each time one-bit data is
input, the data of this register are shifted one bit to the left.
The I2C data shift register is in a write enable status only when the
ESO bit of the I2C control register (address 00F916) is “1.” The bit
counter is reset by a write instruction to the I2C data shift register.
When both the ESO bit and the MST bit of the I2C status register
(address 00F816) are “1,” the SCL is output by a write instruction to
the I2C data shift register. Reading data from the I2C data shift register is always enabled regardless of the ESO bit value.
Note: To write data into the I2C data shift register after setting the MST bit to
“0” (slave mode), keep an interval of 8 machine cycles or more.
I2C Data Shift Register
b7 b6 b5 b4 b3 b2 b1 b0
2
I C data shift register1(S0) [Address 00F616]
B
Name
Functions
0
to
7
D0 to D7
This is an 8-bit shift register to store
receive data and write transmit data.
After reset
R W
Indeterminate R W
Note: To write data into the I2C data shift register after setting the MST bit to
“0” (slave mode), keep an interval of 8 machine cycles or more.
Fig. 8.6.2 Data Shift Register
Rev. 1.0
30
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.2 I2C Address Register
The I2C address register (address 00F716) consists of a 7-bit slave
address and a read/write bit. In the addressing mode, the slave address written in this register is compared with the address data to be
received immediately after the START condition are detected.
(1) Bit 0: read/write bit (RBW)
Not used when comparing addresses, in the 7-bit addressing mode.
In the 10-bit addressing mode, the first address data to be received
is compared with the contents (SAD6 to SAD0 + RBW) of the I2C
address register.
The RBW bit is cleared to “0” automatically when the stop condition
is detected.
(2) Bits 1 to 7: slave address (SAD0–SAD6)
These bits store slave addresses. Regardless of the 7-bit addressing mode and the 10-bit addressing mode, the address data transmitted from the master is compared with the contents of these bits.
I2C Address Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C address register (S0D) [Address 00F716]
B
Name
Functions
<Only in 10-bit addressing (in slave) mode>
The last significant bit of address data is
compared.
0: Wait the first byte of slave address after
START condition
(read state)
1: Wait the first byte of slave address after
RESTART condition
(write state)
0
Read/write bit
(RBW)
1
to
7
Slave address
<In both modes>
(SAD0 to SAD6) The address data is compared.
After reset R W
0
R —
0
R W
Fig. 8.6.3 I2C Address Register
Rev. 1.0
31
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.3 I2C Clock Control Register
(4) Bit 7: ACK clock bit (ACK)
The I2C clock control register (address 00FA16) is used to set ACK
control, SCL mode and SCL frequency.
This bit specifies a mode of acknowledgment which is an acknowledgment response of data transmission. When this bit is set to “0,”
the no ACK clock mode is set. In this case, no ACK clock occurs
after data transmission. When the bit is set to “1,” the ACK clock
mode is set and the master generates an ACK clock upon completion of each 1-byte data transmission.The device for transmitting
address data and control data releases the SDA at the occurrence of
an ACK clock (make SDA HIGH) and receives the ACK bit generated
by the data receiving device.
(1) Bits 0 to 4: SCL frequency control bits (CCR0–CCR4)
These bits control the SCL frequency.
(2) Bit 5: SCL mode specification bit (FAST MODE)
This bit specifies the SCL mode. When this bit is set to “0,” the standard clock mode is set. When the bit is set to “1,” the high-speed
clock mode is set.
(3) Bit 6: ACK bit (ACK BIT)
This bit sets the SDA status when an ACK clock✽ is generated. When
this bit is set to “0,” the ACK return mode is set and SDA goes to
LOW at the occurrence of an ACK clock. When the bit is set to “1,”
the ACK non-return mode is set. The SDA is held in the HIGH status
at the occurrence of an ACK clock.
However, when the slave address matches the address data in the
reception of address data at ACK BIT = “0,” the SDA is automatically
made LOW (ACK is returned). If there is a mismatch between the
slave address and the address data, the SDA is automatically made
HIGH (ACK is not returned).
Note: Do not write data into the I2C clock control register during transmission.
If data is written during transmission, the I2C clock generator is reset, so
that data cannot be transmitted normally.
✽ACK clock: Clock for acknowledgement
I2C Clock Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I2 C clock control register (S2 : address 00FA 16)
B
0
to
4
Name
After reset R W
Functions
SCL frequency control Setup value Standard clock High speed
mode
clock mode
of CCR4–
bits
CCR0
(CCR0 to CCR4)
Setup disabled Setup disabled
00 to 02
03
Setup disabled
04
Setup disabled
250
05
100
400 (See note)
83.3
166
06
...
0
R W
0
R W
333
500/CCR value 1000/CCR value
1D
17.2
34.5
1E
16.6
1F
16.1
33.3
32.3
(at φ = 4 MHz, unit : kHz)
0: Standard clock mode
1: High-speed clock mode
5
SCL mode
specification bit
(FAST MODE)
6
ACK bit
(ACK BIT)
0: ACK is returned.
1: ACK is not returned.
0
R W
7
ACK clock bit
(ACK)
0: No ACK clock
1: ACK clock
0
R W
Note: At 4000kHz in the high-speed clock mode, the duty is as below .
“0” period : “1” period = 3 : 2
In the other cases, the duty is as below.
“0” period : “1” period = 1 : 1
Fig. 8.6.4 I2C Address Register
Rev. 1.0
32
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.4 I2C Control Register
(3) Bit 4: data format selection bit (ALS)
The I2C control register (address 00F916) controls the data communication format.
This bit decides whether or not to recognize slave addresses. When
this bit is set to “0,” the addressing format is selected, so that address data is recognized. When a match is found between a slave
address and address data as a result of comparison or when a general call (refer to “8.6.5 I2C Status Register,” bit 1) is received, transmission processing can be performed. When this bit is set to “1,” the
free data format is selected, so that slave addresses are not recognized.
(1) Bits 0 to 2: bit counter (BC0–BC2)
These bits decide the number of bits for the next 1-byte data to be
transmitted. An interrupt request signal occurs immediately after the
number of bits specified with these bits are transmitted.
When a START condition is received, these bits become “0002” and
the address data is always transmitted and received in 8 bits.
(2) Bit 3: I2C interface use enable bit (ESO)
This bit enables usage of the multimaster I2C BUS interface. When
this bit is set to “0,” the use disable status is provided, so the SDA
and the SCL become high-impedance. When the bit is set to “1,” use
of the interface is enabled.
When ESO = “0,” the following is performed.
• PIN = “1,” BB = “0” and AL = “0” are set (they are bits of the I2C
status register at address 00F816 ).
• Writing data to the I2C data shift register (address 00F616) is disabled.
(4) Bit 5: addressing format selection bit (10BIT SAD)
This bit selects a slave address specification format. When this bit is
set to “0,” the 7-bit addressing format is selected. In this case, only
the high-order 7 bits (slave address) of the I2C address register (address 00F716) are compared with address data. When this bit is set
to “1,” the 10-bit addressing format is selected, all the bits of the I2C
address register are compared with address data.
(5) Bits 6 and 7: connection control bits between
I 2 C-BUS interface and ports
(BSEL0, BSEL1)
These bits controls the connection between SCL and ports or SDA
and ports (refer to Figure 8.6.5).
“0”
“1” BSEL0
SCL/P11
SCL
Multi-master
I2C-BUS
interface
SDA
“0”
“1” BSEL1
SCL2/P12
“0”
“1” BSEL0
SDA1/P13
“0”
“1” BSEL1
SDA2/P14
Note: Set the corresponding direction register to “1” to use the
port as multi-master I2C-BUS interface.
Fig. 8.6.5 Connection Port Control by BSEL0 and BSEL1
Rev. 1.0
33
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
I2C Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C control register (S1D address 00F916)
B
Name
0
to
2
Bit counter
(Number of transmit/recieve
bits)
(BC0 to BC2)
b2
0
0
0
0
1
1
1
1
b0
0 :8
1 :7
0 :6
1 :5
0 :4
1 :3
0 :2
1 :1
0
R W
3
I2C-BUS interface use
enable bit (ESO)
0 :Disabled
1 :Enabled
0
R W
4
Data format selection
bit(ALS)
0 :Addressing mode
1 :Free data format
0
R W
5
Addressing format selection
bit (10BIT SAD)
0 :7-bit addressing format
1 :10-bit addressing format
0
R W
b7 b6 Connection port (See note)
0 0 :None
0 1 :SCL1, SDA1
1 0 :SCL2, SDA2
1 1 :SCL1, SDA1
SCL2, SDA2
0
R W
6, 7 Connection control bits
between I2C-BUS interface
and ports
Functions
b1
0
0
1
1
0
0
1
1
After reset R W
Note: When using ports P11-P14 as I2C-BUS interface, the output structure changes
automatically from CMOS output to N-channel open-drain output.
Fig. 8.6.6 I2C Control Register
Rev. 1.0
34
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.5 I2C Status Register
(5) Bit 4: I2C-BUS interface interrupt request bit (PIN)
The I2C status register (address 00F816) controls the I2C-BUS interface status. The low-order 4 bits are read-only bits and the highorder 4 bits can be read out and written to.
This bit generates an interrupt request signal. Each time 1-byte data
is transmitted, the state of the PIN bit changes from “1” to “0.” At the
same time, an interrupt request signal is sent to the CPU. The PIN bit
is set to “0” in synchronization with a falling edge of the last clock
(including the ACK clock) of an internal clock and an interrupt request signal occurs in synchronization with a falling edge of the PIN
bit. When the PIN bit is “0,” the SCL is kept in the “0” state and clock
generation is disabled. Figure 8.6.8 shows an interrupt request signal generating timing chart.
The PIN bit is set to “1” in any one of the following conditions.
• Executing a write instruction to the I2C data shift register (address
00F616).
• When the ESO bit is “0”
• At reset
The conditions in which the PIN bit is set to “0” are shown below:
• Immediately after completion of 1-byte data transmission (including when arbitration lost is detected)
• Immediately after completion of 1-byte data reception
• In the slave reception mode, with ALS = “0” and immediately after
completion of slave address or general call address reception
• In the slave reception mode, with ALS = “1” and immediately after
completion of address data reception
(1) Bit 0: last receive bit (LRB)
This bit stores the last bit value of received data and can also be
used for ACK receive confirmation. If ACK is returned when an ACK
clock occurs, the LRB bit is set to “0.” If ACK is not returned, this bit is
set to “1.” Except in the ACK mode, the last bit value of received data
is input. The state of this bit is changed from “1” to “0” by executing a
write instruction to the I2C data shift register (address 00F616).
(2) Bit 1: general call detecting flag (AD0)
This bit is set to “1” when a general call✽ whose address data is all
“0” is received in the slave mode. By a general call of the master
device, every slave device receives control data after the general
call. The AD0 bit is set to “0” by detecting the STOP condition or
START condition.
✽General call: The master transmits the general call address “0016”
to all slaves.
(3) Bit 2: slave address comparison flag (AAS)
This flag indicates a comparison result of address data.
■ In the slave receive mode, when the 7-bit addressing format is
selected, this bit is set to “1” in one of the following conditions.
• The address data immediately after occurrence of a START condition matches the slave address stored in the high-order 7 bits
of the I2C address register (address 00F716).
• A general call is received.
■ In the slave reception mode, when the 10-bit addressing format is
selected, this bit is set to “1” with the following condition.
• When the address data is compared with the I2C address register (8 bits consists of slave address and RBW), the first bytes
match.
■ The state of this bit is changed from “1” to “0” by executing a write
instruction to the I2C data shift register (address 00F616).
(4) Bit 3: arbitration lost✽ detecting flag (AL)
n the master transmission mode, when a device other than the microcomputer sets the SDA to “L,”, arbitration is judged to have been
lost, so that this bit is set to “1.” At the same time, the TRX bit is set to
“0,” so that immediately after transmission of the byte whose arbitration was lost is completed, the MST bit is set to “0.” When arbitration
is lost during slave address transmission, the TRX bit is set to “0” and
the reception mode is set. Consequently, it becomes possible to receive and recognize its own slave address transmitted by another
master device.
✽Arbitration lost: The status in which communication as a master is
disabled.
(6) Bit 5: bus busy flag (BB)
This bit indicates the status of use of the bus system. When this bit is
set to “0,” this bus system is not busy and a START condition can be
generated. When this bit is set to “1,” this bus system is busy and the
occurrence of a START condition is disabled by the START condition
duplication prevention function (See note).
This flag can be written by software only in the master transmission
mode. In the other modes, this bit is set to “1” by detecting a START
condition and set to “0” by detecting a STOP condition. When the
ESO bit of the I2C control register (address 00F916) is “0” and at
reset, the BB flag is kept in the “0” state.
(7) Bit 6: communication mode specification bit
(transfer direction specification bit: TRX)
This bit decides the direction of transfer for data communication. When
this bit is “0,” the reception mode is selected and the data of a transmitting device is received. When the bit is “1,” the transmission mode
is selected and address data and control data are output into the
SDA in synchronization with the clock generated on the SCL.
When the ALS bit of the I2C control register (address 00F916) is “0” in
the slave reception mode is selected, the TRX bit is set to “1” (trans___
mit) if the least significant bit (R/W bit) of the address data transmit___
ted by the master is “1.” When the ALS bit is “0” and the R/W bit is
“0,” the TRX bit is cleared to “0” (receive).
The TRX bit is cleared to “0” in one of the following conditions.
• When arbitration lost is detected.
• When a STOP condition is detected.
• When occurence of a START condition is disabled by the START
condition duplication prevention function (Note).
• With MST = “0” and when a START condition is detected.
• With MST = “0” and when ACK non-return is detected.
• At reset
Rev. 1.0
35
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(8) Bit 7: Communication mode specification bit
(master/slave specification bit: MST)
This bit is used for master/slave specification for data communication. When this bit is “0,” the slave is specified, so that a START
condition and a STOP condition generated by the master are received,
and data communication is performed in synchronization with the
clock generated by the master. When this bit is “1,” the master is
specified and a START condition and a STOP condition are generated, and also the clocks required for data communication are generated on the SCL.
The MST bit is cleared to “0” in one of the following conditions.
• Immediately after completion of 1-byte data transmission when
arbitration lost is detected
• When a STOP condition is detected.
• When occurence of a START condition is disabled by the START
condition duplication preventing function (Note).
• At reset
Note: The START condition duplication prevention function disables the START
condition generation, reset of bit counter reset, and SCL output, when
the following condition is satisfied:
a START condition is set by another master device.
I2C Status Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C status register (S1) [Address 00F816]
B
0
Name
Functions
Last receive bit (LRB)
(See note)
0 : Last bit = “0 ”
1 : Last bit = “1 ”
1
General call detecting flag
(AD0) (See note)
2
3
After reset R W
Indeterminate
R —
0 : No general call detected
1 : General call detected
(See note)
0
R —
Slave address comparison
flag (AAS) (See note)
0 : Address mismatch
1 : Address match
0
R —
Arbitration lost detecting flag
(AL) (See note)
0 : Not detected
1 : Detected
0
R —
1
R W
0 : Bus free
1 : Bus busy
0
R W
b7
0
0
1
1
0
R W
4
I2C-BUS interface interrupt
request bit (PIN)
5
Bus busy flag (BB)
6, 7 Communication mode
specification bits
(TRX, MST)
(See note)
(See note)
(See note)
0 : Interrupt request issued
1 : No interrupt request issued
b6
0 : Slave recieve mode
1 : Slave transmit mode
0 : Master recieve mode
1 : Master transmit mode
Note : These bits and flags can be read out, but cannnot be written.
Fig. 8.6.7 I2C Status Register
SCL
PIN
IICIRQ
Fig. 8.6.8 Interrupt Request Signal Generation Timing
Rev. 1.0
36
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.6 START Condition Generation Method
When the ESO bit of the I2C control register (address 00F916) is “1,”
execute a write instruction to the I2C status register (address 00F816)
to set the MST, TRX and BB bits to “1.” A START condition will then
be generated. After that, the bit counter becomes “0002” and an SCL
for 1 byte is output. The START condition generation timing and BB
bit set timing are different in the standard clock mode and the highspeed clock mode. Refer to Figure 8.6.9 for the START condition
generation timing diagram, and Table 8.6.2 for the START condition/
STOP condition generation timing table.
I2C status register
write signal
SCL
SDA
Setup
time
Hold time
Set time
for BB flag
BB flag
Fig. 8.6.9 START Condition Generation Timing Diagram
8.6.7 STOP Condition Generation Method
When the ESO bit of the I2C control register (address 00F916) is “1,”
execute a write instruction to the I2C status register (address 00F816)
for setting the MST bit and the TRX bit to “1” and the BB bit to “0”. A
STOP condition will then be generated. The STOP condition generation timing and the BB flag reset timing are different in the standard
clock mode and the high-speed clock mode. Refer to Figure 8.6.10
for the STOP condition generation timing diagram, and Table 8.6.2
for the START condition/STOP condition generation timing table.
I2C status register
write signal
SCL
SDA
BB flag
Setup
time
Hold time
Reset time
for BB flag
Fig. 8.6.10 STOP Condition Generation Timing Diagram
Table 8.6.2 START Condition/STOP Condition Generation Timing Table
Item
Standard Clock Mode
Setup time
5.0 µs (20 cycles)
(START condition)
Setup time
4.25 µs (17 cycles)
(STOP condition)
5.0 µs (20 cycles)
Hold time
Set/reset time
3.0 µs (12 cycles)
for BB flag
High-speed Clock Mode
2.5 µs (10 cycles)
1.75 µs (7 cycles)
2.5 µs (10 cycles)
1.5 µs (6 cycles)
Note: Absolute time at φ = 4 MHz. The value in parentheses denotes the
number of φ cycles.
Rev. 1.0
37
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.8 START/STOP Condition Detect Conditions
8.6.9 Address Data Communication
The START/STOP condition detect conditions are shown in
Figure 8.6.11 and Table 8.6.3. Only when the 3 conditions of Table
8.6.3 are satisfied, a START/STOP condition can be detected.
There are two address data communication formats, namely, 7-bit
addressing format and 10-bit addressing format. The respective address communication formats is described below.
Note: When a STOP condition is detected in the slave mode
(MST = 0), an interrupt request signal “IICIRQ” is generated to the
CPU.
(1) 7-bit addressing format
SCL release time
SCL
SDA
(START condition)
Setup
time
Hold time
Setup
time
Hold time
To meet the 7-bit addressing format, set the 10BIT SAD bit of the I2C
control register (address 00F916) to “0.” The first 7-bit address data
transmitted from the master is compared with the high-order 7-bit
slave address stored in the I2C address register (address 00F716).
At the time of this comparison, address comparison of the RBW bit of
the I2C address register (address 00F716) is not made. For the data
transmission format when the 7-bit addressing format is selected,
refer to Figure 8.6.12, (1) and (2).
(2) 10-bit addressing format
SDA
(STOP condition)
Fig. 8.6.11 START Condition/STOP Condition Detect Timing Diagram
Table 8.6.3 START Condition/STOP Condition Detect Conditions
Standard Clock Mode
6.5 µs (26 cycles) < SCL
release time
3.25 µs (13 cycles) < Setup time
3.25 µs (13 cycles) < Hold time
High-speed Clock Mode
1.0 µs (4 cycles) < SCL
release time
0.5 µs (2 cycles) < Setup time
0.5 µs (2 cycles) < Hold time
Note: Absolute time at φ = 4 MHz. The value in parentheses denotes the number of φ cycles.
To meet the 10-bit addressing format, set the 10BIT SAD bit of the
I2C control register (address 00F916) to “1.” An address comparison
is made between the first-byte address data transmitted from the
master and the 7-bit slave address stored in the I2C address register
(address 00F716). At the time of this comparison, an address comparison between the RBW bit of the I2C address register (address
00F716) and the R/W bit which is the last bit of the address data
transmitted from the master is made. In the 10-bit addressing mode,
the R/W bit which is the last bit of the address data not only specifies
the direction of communication for control data but also is processed
as an address data bit.
When the first-byte address data matches the slave address, the
AAS bit of the I2C status register (address 00F816) is set to “1.” After
the second-byte address data is stored into the I2C data shift register
(address 00F616), make an address comparison between the second-byte data and the slave address by software. When the address
data of the 2nd bytes matches the slave address, set the RBW bit of
the I2C address register (address 00F716) to “1” by software. This
processing can match the 7-bit slave address and R/W data, which
are received after a RESTART condition is detected, with the value
of the I2C address register (address 00F716). For the data transmission format when the 10-bit addressing format is selected, refer to
Figure 8.6.12, (3) and (4).
Rev. 1.0
38
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.6.10 Example of Master Transmission
8.6.11 Example of Slave Reception
An example of master transmission in the standard clock mode, at
the SCL frequency of 100 kHz and in the ACK return mode is shown
below.
➀ Set a slave address in the high-order 7 bits of the I 2C address
register (address 00F716) and “0” in the RBW bit.
➁ Set the ACK return mode and SCL = 100 kHz by setting “8516” in
the I2C clock control register (address 00FA16).
➂ Set “1016” in the I2C status register (address 00F816) and hold the
SCL at the HIGH.
√ Set a communication enable status by setting “4816” in the I2C
control register (address 00F916).
➄ Set the address data of the destination of transmission in the highorder 7 bits of the I2C data shift register (address 00F616) and set
“0” in the least significant bit.
≈ Set “F016” in the I2C status register (address 00F816) to generate
a START condition. At this time, an SCL for 1 byte and an ACK
clock automatically occurs.
∆ Set transmit data in the I2C data shift register (address 00F616). At
this time, an SCL and an ACK clock automatically occurs.
➇ When transmitting control data of more than 1 byte, repeat step ∆ .
➈ Set “D016” in the I2C status register (address 00F816). After this, if
ACK is not returned or transmission ends, a STOP condition will
be generated.
An example of slave reception in the high-speed clock mode, at the
SCL frequency of 400 kHz, in the ACK non-return mode, using the
addressing format, is shown below.
➀ Set a slave address in the high-order 7 bits of the I2C address
register (address 00F716) and “0” in the RBW bit.
➁ Set the no ACK clock mode and SCL = 400 kHz by setting “2516”
in the I2C clock control register (address 00FA16).
➂ Set “1016” in the I2C status register (address 00F816) and hold the
SCL at the HIGH.
√ Set a communication enable status by setting “4816” in the I2C
control register (address 00F916).
➄ When a START condition is received, an address comparison is
made.
≈ •When all transmitted address are“0” (general call):
AD0 of the I2C status register (address 00F816) is set to “1”and
an interrupt request signal occurs.
•When the transmitted addresses match the address set in ➀:
ASS of the I2C status register (address 00F816) is set to “1” and
an interrupt request signal occurs.
•In the cases other than the above:
AD0 and AAS of the I2C status register (address 00F816) are set
to “0” and no interrupt request signal occurs.
∆ Set dummy data in the I2C data shift register (address 00F616).
➇ When receiving control data of more than 1 byte, repeat step ∆ .
➈ When a STOP condition is detected, the communication ends.
Rev. 1.0
39
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
S
Slave address R/W
A
Data
A
Data
A/A
P
A
P
Data
A
7 bits
“ 0”
1 to 8 bits
1 to 8 bits
(1) A master-transmitter transmits data to a slave-receiver
S
Slave address R/W
A
Data
A
Data
7 bits
“ 1”
1 to 8 bits
1 to 8 bits
(2) A master-receiver receives data from a slave-transmitter
S
Slave address
R/W
1st 7 bits
A
Slave address
2nd byte
A
Data
A/A
P
1 to 8 bits
7 bits
“ 0”
8 bits
1 to 8 bits
(3) A master-transmitter transmits data to a slave-receiver with a 10-bit address
S
Slave address
R/W
1st 7 bits
A
Slave address
2nd byte
A
Sr
Slave address
R/W
1st 7 bits
Data
7 bits
“ 0”
8 bits
7 bits
“1” 1 to 8 bits
(4) A master-receiver receives data from a slave-transmitter with a 10-bit address
S : START condition
A : ACK bit
Sr : Restart condition
P : STOP condition
R/W : Read/Write bit
A
Data
A
P
1 to 8 bits
From master to slave
From slave to master
Fig. 8.6.12 Address Data Communication Format
8.6.12 Precautions when using multi-master
I2C-BUS interface
(2) START condition generating procedure using multi-master
(1) Read-modify-write instruction
➀Procedure example (The necessary conditions of the generating
procedure are described as the following ➁ to ➄).
The precautions when the raead-modify-write instruction such as SEB,
CLB etc. is executed for each register of the multi-master I2C-BUS
interface are described below.
•I2C data shift register (S0)
When executing the read-modify-write instruction for this register
during transfer, data may become a value not intended.
•I2C address register (S0D)
When the read-modify-write instruction is executed for this register
at detecting the STOP condition, data may become a value not
______
intended. It is because hardware changes the read/write bit (RBW)
at the above timing.
•I2C status register (S1)
Do not execute the read-modify-write instruction for this register
because all bits of this register are changed by hardware.
•I2C control register (S1D)
When the read-modify-write instruction is executed for this register
at detecting the START condition or at completing the byte transfer,
data may become a value not intended. Because hardware changes
the bit counter (BC0–BC2) at the above timing.
•I2C clock control register (S2)
The read-modify-write instruction can be executed for this register.
•
•
—
LDA
SEI
BBS 5,S1,BUSBUSY
BUSFREE:
STA S0
LDM #$F0, S1
CLI
•
•
BUSBUSY:
CLI
•
•
(Taking out of slave address value)
(Interrupt disabled)
(BB flag confirming and branch process)
(Writing of slave address value)
(Trigger of START condition generating)
(Interrupt enabled)
(Interrupt enabled)
➁Use “STA,” “STX” or “STY” of the zero page addressing instruction
for writing the slave address value to the I2C data shift register.
➂Use “LDM” instruction for setting trigger of START condition generating.
√ Write the slave address value of above ➁ and set trigger of START
condition generating of above ➂ continuously shown the above
procedure example.
➄Disable interrupts during the following three process steps:
• BB flag confirming
• Writing of slave address value
• Trigger of START condition generating
When the condition of the BB flag is bus busy, enable interrupts
immediately.
Rev. 1.0
40
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(3) RESTART condition generating procedure
(4) STOP condition generating procedure
➀Procedure example (The necessary conditions of the generating
procedure are described as the following ➁ to ≈ .)
Execute the following procedure when the PIN bit is “0.”
➀Procedure example (The necessary conditions of the generating
procedure are described as the following ➁ to √ .)
LDM
LDA
SEI
STA
LDM
CLI
•
•
#$00, S1
—
S0
#$F0, S1
•
•
(Select slave receive mode)
(Taking out of slave address value)
(Interrupt disabled)
(Writing of slave address value)
(Trigger of RESTART condition generating)
(Interrupt enabled)
•
•
➁Select the slave receive mode when the PIN bit is “0.” Do not write
“1” to the PIN bit. Neither “0” nor “1” is specified for the writing to
the BB bit.
The TRX bit becomes “0” and the SDA pin is released.
➂The SCL pin is released by writing the slave address value to the
I2C data shift register. Use “STA,” “STX” or “STY” of the zero page
addressing instruction for writing.
√ Use “LDM” instruction for setting trigger of RESTART condition generating.
➄Write the slave address value of above ➂ and set trigger of RESTART condition generating of above √ continuously shown the
above procedure example.
≈ Disable interrupts during the following two process steps:
• Writing of slave address value
• Trigger of RESTART condition generating
SEI
LDM #$C0, S1
NOP
LDM #$D0, S1
CLI
•
•
(Interrupt disabled)
(Select master transmit mode)
(Set NOP)
(Trigger of STOP condition generating)
(Interrupt enabled)
➁Write “0” to the PIN bit when master transmit mode is select.
➂Execute “NOP” instruction after setting of master transmit mode.
Also, set trigger of STOP condition generating within 10 cycles after selecting of master trasmit mode.
√ Disable interrupts during the following two process steps:
• Select of master transmit mode
• Trigger of STOP condition generating
(5) Writing to I2C status register
Do not execute an instruction to set the PIN bit to “1” from “0” and an
instruction to set the MST and TRX bits to “0” from “1” simultaneously.
It is because it may enter the state that the SCL pin is released and
the SDA pin is released after about one machine cycle. Do not execute an instruction to set the MST and TRX bits to “0” from “1” simultaneously when the PIN bit is “1.” It is because it may become the
same as above.
(6) Process of after STOP condition generating
Do not write data in the I2C data shift register S0 and the I2C status
register S1 until the bus busy flag BB becomes “0” after generating
the STOP condition in the master mode. It is because the STOP
condition waveform might not be normally generated. Reading to the
above registers do not have the problem.
Rev. 1.0
41
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.7 PWM OUTPUT FUNCTION
This microcomputer is equipped with six 8-bit PWMs (PWM0–
PWM5). PWM0–PWM5 have the same circuit structure and an 8-bit
resolution with minimum resolution bit width of 4 µs (for f(XIN) = 8
MHz) and repeat period of 1024 µs (for f(XIN) = 8 MHz).
Figure 8.7.1 shows the PWM block diagram. The PWM timing generating circuit applies individual control signals to PWM0–PWM5 using f(XIN) divided by 2 as a reference signal.
8.7.1 Data Setting
When outputting PWM0–PWM5, set 8-bit output data to the PWMi
register (i means 0 to 5; addresses 020016 to 020516).
8.7.2 Transmitting Data from Register to PWM
circuit
Data transfer from the 8-bit PWM register to the 8-bit PWM circuit is
executed at writing data to the register.
The signal output from the 8-bit PWM output pin corresponds to the
contents of this register.
8.7.3 Operating of 8-bit PWM
The following explains PWM operation.
First, set the bit 0 of PWM mode register 1 (address 020816) to “0”
(at reset, bit 0 is already set to “0” automatically), so that the PWM
count source is supplied.
PWM0–PWM5 are also used as pins P00–P05. Set the corresponding bits of the port P0 direction register to “1” (output mode). And
select each output polarity by bit 3 of PWM mode register 1 (address
020816). Then, set bits 5 to 0 of PWM mode register 2 (address
020916) to “1” (PWM output).
The PWM waveform is output from the PWM output pins by setting
these registers.
Figure 17 shows the 8-bit PWM timing. One cycle (T) is composed
of 256 (28) segments. The 8 kinds of pulses relative to the weight of
each bit (bits 0 to 7), are output inside the circuit during 1 cycle.
Refer to Figure 17 (a). The 8-bit PWM outputs waveform which is
the logical sum (OR) of pulses corresponding to the contents of bits
0 to 7 of the 8-bit PWM register. Several examples are shown in
Figure 17 (b). 256 kinds of output (HIGH area: 0/256 to 255/256) are
selected by changing the contents of the PWM register. A length of
entirely HIGH cannot be output, i.e. 256/256.
8.7.4 Output after Reset
At reset, the output of ports P00–P05 is in the high-impedance state,
and the contents of the PWM register and the PWM circuit are undefined. Note that after reset, the PWM output is undefined until setting
the PWM register.
Rev. 1.0
42
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Data bus
XIN
1/2
PM10
PWM timing
generating
circuit
PWM0 register
(Address 0200 16)
b7
b0
8
PM13
P00
D00
PWM0
8-bit PWM circuit
PM20
P01
PWM1 register (Address 0201 16)
Selection gate:
Connected to
black side at
reset.
Inside of
is as same contents with the others.
D03
PWM3
D04
PWM4
D05
PWM5
PM24
P05
PWM5 register (Address 0205 16)
PWM2
PM23
P04
PWM4 register (Address 0204 16)
D02
PM22
P03
PWM3 register (Address 0203 16)
PWM1
PM21
P02
PWM2 register (Address 0202 16)
D01
PM25
PM1 : PWM mode register 1 (address 0208 16)
PM2 : PWM mode register 2 (address 0209 16)
P0 : Port P0 register (address 00C0 16)
D0 : Port P0 direction register (address 00C1 16)
Fig. 8.7.1 PWM Block Diagram
Rev. 1.0
43
44
FF16 (255)
1816 (24)
0116 (1)
0016 (0)
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
t
2
4
6
8
12
16
20
24
32
36
50
40
44
48
60
56
60
64
72
80
90
120
130
140
150
92
96
104
100
112
108
124
120
116
128
144
140
136
132
156
152
148
(b) Example of 8-bit PWM
t = 4 µs T = 1024 µs
f(XIN) = 8 MHz
T = 256 t
(a) Pulses showing the weight of each bit
88
110
160
170
180
190
200
210
220
230
240
250 255
160
164
168
172
176
180
184
188
192
196
200
212
208
204
216
224
220
228
232
244
240
236
248
252
94 98 102 106 110 114 118 122 126 130 134 138 142 146 150 154 158 162 166 170 174 178 182 186 190 194 198 202 206 210 214 218 222 226 230 234 238 242 246 250 254
100
PWM output
80
84
78 82 86 90
76
70 74
70
68
54 58 62 66
52
42 46 50
40
30 34 38
30
28
22 26
20
10 14 18
13579
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Fig. 8.7.2 PWM Timing
Rev. 1.0
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
PWM Mode Register 1
b7 b6 b5 b4 b3 b2 b1 b0
PWM mode register 1 (PM1) [Address 020816]
B
0
Name
PWM counts source
selection bit (PM10)
Functions
0 : Count source supply
1 : Count source stop
After reset R W
0
R W
1, 2 Nothing is assigned. These bits are write disable bits. Indeterminate R —
When these bits are read out, the values are “0.”
PWM output polarity
selection bit (PM13)
3
0 : Positive polarity
1 : Negative polarity
0
R W
4 Nothing is assigned. These bits are write disable bits. Indeterminate R —
to When these bits are read out, the values are “0.”
7
Fig. 8.7.3 PWM Mode Register 1
PWM Mode Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0 0
PWM mode register 2 (PM2) [Address 0209 16]
B
Name
0 P00/PWM0 output
selection bit (PM20)
Functions
0 : P0 0 output
1 : PWM0 output
1
P01/PWM1 output
selection bit (PM21)
0 : P0 1 output
1 : PWM1 output
0
R W
2
P02/PWM2 output
selection bit (PM22)
0 : P0 2 output
1 : PWM2 output
0
R W
3
P03/PWM3 output
selection bit (PM23)
0 : P0 3 output
1 : PWM3 output
0
R W
4
P04/PWM4 output
selection bit (PM24)
0 : P0 4 output
1 : PWM4 output
0
R W
5
P05/PWM5 output
selection bit (PW25)
0: P05 output
1: PWM5 output
0
R W
0
R W
6, 7 Fix these bits to “0.”
After reset R W
0
R W
Fig. 8.7.4 PWM Mode Register 2
Rev. 1.0
45
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.8 A-D COMPARATOR
A-D comparator consists of 6-bit D-A converter and comparator. A-D
comparator block diagram is shown in Figure 8.8.1.
The reference voltage “Vref” for D-A conversion is set by bits 0 to 5 of
A-D control register 2 (address 00ED16).
The comparison result of the analog input voltage and the reference
voltage “Vref” is stored in bit 4 of A-D control register 1 (address
00EC16).
For A-D comparison, set “0” to corresponding bits of the direction
register to use ports as analog input pins. Write the data for select of
analog input pins to bits 0 to 2 of A-D control register 1 and write the
digital value corresponding to V ref to be compared to the bits 0
to 5 of A-D control register 2. The voltage comparison starts by writing to A-D control register 2, and it is completed after 16 machine
cycles (NOP instruction ✕ 8).
Data bus
A-D control register 1
Bits 0 to 2
AD1
AD2
AD3
AD4
AD5
AD6
Comparator control
A-D control
register 2
A-D control
register 1
Analog
signal
switch
Comparator
Bit 4
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Switch tree
Resistor ladder
Fig. 8.8.1 A-D Comparator Block Diagram
Rev. 1.0
46
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
A-D Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 1 (AD1) [Address 00EC16]
B
Name
Functions
0
to
2
Analog input pin selection
bits
(ADC10 to ADC12)
3
This bit is a write disable bit.
When this bit is read out, the value is “0.”
4
Storage bit of comparison
result (ADC14)
5
to
7
Nothing is assigned. This bits are write disable bits.
When these bits are read out, the values are “0.”
b2
0
0
0
0
1
1
1
1
b1
0
0
1
1
0
0
1
1
b0
0 : AD1
1 : AD2
0 : AD3
1 : AD4
0 : AD5
1 : AD6
0:
Do not set.
1:
0: Input voltage < reference voltage
1: Input voltage > reference voltage
After reset R W
0
R W
0
R —
Indeterminate
R W
0
R —
After reset
R W
0
R W
0
R —
Fig. 8.8.2 A-D Control Register 1
A-D Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 2 (AD2) [Address 00ED 16]
B
0
to
5
Name
D-A converter set bits
(ADC20 to ADC25)
Functions
b5
0
0
0
b4
0
0
0
b3
0
0
0
b2
0
0
0
b1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
b0
0 : 1/128Vcc
1 : 3/128Vcc
0 : 5/128Vcc
1 : 123/128Vcc
0 : 125/128Vcc
1 : 127/128Vcc
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are reed out, the values are “ 0.”
Fig. 8.8.3 A-D Control Register 2
Rev. 1.0
47
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.9 ROM CORRECTION FUNCTION
This can correct program data in ROM. Up to 2 addresses can be
corrected, a program for correction is stored in the ROM correction
vector in RAM as the top address. The ROM correction vectors are 2
vectors.
Vector 1 : address 030016
Vector 2 : address 032016
Set the address of the ROM data to be corrected into the ROM correction address register. When the value of the counter matches the
ROM data address in the ROM correction vector as the top address,
the main program branches to the correction program stored in the
ROM memory for correction. To return from the correction program
to the main program, the op code and operand of the JMP instruction
(total of 3 bytes) are necessary at the end of the correction program.
The ROM correction function is controlled by the ROM correction
enable register.
ROM correction address 1 (high-order)
020A 16
ROM correction address 1 (low-order)
020B 16
ROM correction address 2 (high-order)
020C 16
ROM correction address 2 (low-order)
020D 16
Fig. 8.9.1 ROM Correction Address Registers
Notes 1: S p e c i f y t h e f i r s t a d d r e s s ( o p c o d e a d d r e s s ) o f e a c h
instruction as the ROM correction address.
2: Use the JMP instruction (total of 3 bytes) to return from
the correction program to the main program.
3: Do not set the same ROM correction address to vectors 1
and 2.
ROM Correction Enable Register
b7 b6 b5 b4 b3 b2 b1 b0
ROM correction enable register (RCR) [Address 020E
Functions
16]
B
Name
After reset
R W
0
Vector 1 enable bit (RC0)
0: Disabled
1: Enabled
0
R W
1
Vector 2 enable bit (RC1)
0: Disabled
1: Enabled
0
R W
2
to
7
Nothing is assigned. These bits are write disable bits. When
these bits are read out, the values are “0.”
0
R —
Fig. 8.9.2 ROM Correction Enable Register
Rev. 1.0
48
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10 DATA SLICER
When the data slicer function is not used, the data slicer circuit and
the timing signal generating circuit can be cut off by setting bit 0 of
the data slicer control register 1 (address 00E016) to “0.” These settings can realize the low-power dissipation.
This microcomputer includes the data slicer function for the closed
caption decoder (referred to as the CCD). This function takes out the
caption data superimposed in the vertical blanking interval of a composite video signal. A composite video signal which makes the sync
chip’s polarity negative is input to the CVIN pin.
0.1 µF
Composite
video
signal
470 Ω
1 kΩ
560 pF
1 MΩ
CV IN
1 µF
Sync pulse counter
register
(address 00E9 16)
200 pF
HSYNC
HLF
Synchronizing
signal counter
Data slicer control register 2
(address 00E1 16)
Clamping
circuit
Low-pass
filter
Sync slice
circuit
Synchronizing
separation
circuit
Data slicer control register 1
(address 00E0 16)
Timing signal
generating
circuit
Data slicer ON/OFF
VHOLD
Reference
voltage
generating
1000 pF circuit
+
Clock run-in
determination
circuit
–
Comparator
Data slice line
specification
circuit
Start bit detecting
circuit
Clock run-in defect register
(address 00E4 16)
Caption position register
(address 00E6 16)
External circuit
Note : Make the length of wiring which is
connected to V HOLD , HLF, and CV IN pin as
short as possible so that a leakage current
may not be generated when mounting a
resistor or a capacitor on each pin.
Data clock
generating circuit
Data clock position register
(address 00E5 16)
16-bit shift register
Interrupt request
generating circuit
high-order
Data slicer
interrupt
request
low-order
Caption data register 2
(address 00E316)
Caption data register 1
(address 00E216)
Caption data register 4
(address 00CF16)
Caption data register 3
(address 00CE16)
Data bus
Fig. 8.10.1 Data Slicer Block Diagram
Rev. 1.0
49
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.1 Notes When not Using Data Slicer
When bit 0 of data slicer control register 1 (address 00E016) is “0,”
terminate the pins as shown in Figure 8.10.2.
<When data slicer circuit and timing signal generating circuit is in OFF state>
Apply the same voltage as V CC to
AV CC pin.
19
Leave HLF pin open.
Open
Leave V HOLD pin open.
Pull-down CV IN pin to V SS through
a resistor of 5 k Ω or more.
Open
20
21
22
5 kΩ or more
AVCC
HLF
VHOLD
CVIN
Fig. 8.10.2 Termination of Data Slicer Input/Output Pins when Data Slicer Circuit and Timing Generating Circuit Is in OFF State
When both bits 0 and 2 of data slicer control register 1 (address
00E016) are “1,” terminate the pins as shown in Figure 8.10.3.
<When using a reference clock generated in timing signal generating circuit as OSD clock>
Apply the same voltage as V CC to AV CC pin.
19
1 kΩ
Connect the same external circuit as when
using data slicer to HLF pin.
Leave V HOLD pin open.
Pull-up CV IN to V CC through a resistor
of 5 kΩ or more.
1 µF
20
AV CC
HLF
200pF
Open
21
VHOLD
5 kΩ or more
22
CVIN
Fig. 8.10.3 Termination of Data Slicer Input/Output Pins when Timing Signal Generating Circuit Is in ON State
Rev. 1.0
50
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Figures 8.10.4 and 8.10.5 the data slicer control registers.
Data Slicer Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
0 1 1 0 0
Data slicer control register 1(DSC1) [Address 00E016]
B
Name
Functions
0
Data slicer and timing signal
generating circuit control bit (DSC10)
1 Selection bit of data slice reference
voltage generating field (DSC11)
2 Reference clock source
selection bit (DSC12)
3, 4 Fix these bits to “0.”
After reset R W
0: Stopped
1: Operating
0: F2
1: F1
0: Video signal
1: HSYNC signal
5, 6 Fix these bits to “1.”
7
Fix this bit to “0.”
0
R W
0
R W
0
R W
0
R W
0
R W
0
R W
Definition of fields 1 (F 1) and 2 (F 2)
F1: Hsep
Vsep
F2: Hsep
Vsep
Fig. 8.10.4 Data Slicer Control Register 1
Data Slicer Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
1
Data slicer control register 2 (DSC2) [Address 00E116]
B
Name
Functions
After reset
R W
0: Data is not latched yet
Indeterminate R —
and a clock-run-in is not
determined.
1: Data is latched and a
clock-run-in is determined.
0
Caption data latch
completion flag 1
(DSC20)
1
Fix this bit to “1.”
2
Test bit
Read-only
Indeterminate R —
3
Field determination
flag(DSC23)
0: F2
1: F1
Indeterminate R —
4
Vertical synchronous signal
(Vsep) generating method
selection bit (DSC24)
0: Method (1)
1: Method (2)
5
V-pulse shape
determination flag (DSC25)
0: Match
1: Mismatch
6
Fix this bit to “o.”
7
Test bit
0
0
R W
Indeterminate R —
0
Read-only
R W
R W
Indeterminate R —
Definition of fields 1 (F 1) and 2 (F 2)
F1: Hsep
Vsep
F2: Hsep
Vsep
Fig. 8.10.5 Data Slicer Control Register 2
Rev. 1.0
51
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.2 Clamping Circuit and Low-pass Filter
The clamp circuit clamps the sync chip part of the composite video
signal input from the CVIN pin. The low-pass filter attenuates the noise
of clamped composite video signal. The CVIN pin to which composite
video signal is input requires a capacitor (0.1 µF) coupling outside.
Pull down the CVIN pin with a resistor of hundreds of kiloohms to 1
MΩ. In addition, we recommend to install externally a simple lowpass filter using a resistor and a capacitor at the CV IN pin (refer to
Figure 8.10.1).
8.10.3 Sync Slice Circuit
This circuit takes out a composite sync signal from the output signal
of the low-pass filter.
8.10.4 Synchronous Signal Separation Circuit
This circuit separates a horizontal synchronous signal and a vertical
synchronous signal from the composite sync signal taken out in the
sync slice circuit.
(1)Horizontal Synchronous Signal (Hsep)
A one-shot horizontal synchronizing signal Hsep is generated at
the falling edge of the composite sync signal.
(2)Vertical Synchronous Signal (Vsep)
As a Vsep signal generating method, it is possible to select one of
the following 2 methods by using bit 4 of the data slicer control
register 2 (address 00E116).
•Method 1 The LOW level width of the composite sync signal is
measured. If this width exceeds a certain time, a Vsep
signal is generated in synchronization with the rising
of the timing signal immediately after this LOW level.
•Method 2 The LOW level width of the composite sync signal is
measured. If this width exceeds a certain time, it is
detected whether a falling of the composite sync signal exits or not in the LOW level period of the timing
signal immediately after this LOW level. If a falling
exists, a Vsep signal is generated in synchronization
with the rising of the timing signal (refer to Figure
8.10.6).
Figure 8.10.6 shows a Vsep generating timing. The timing signal shown
in the figure is generated from the reference clock which the timing
generating circuit outputs.
Reading bit 5 of data slicer control register 2 permits determinating
the shape of the V-pulse portion of the composite sync signal. As
shown in Figure 8.10.7, when the A level matches the B level, this bit
is “0.” In the case of a mismatch, the bit is “1.”
Composite s
Measure LOW period
Timing
signal
Vsep signal
A Vsep signal is generated at a rising of the timing signal
immediately after the LOW level width of the composite
sync signal exceeds a certain time.
Fig. 8.10.6 Vsep Generating Timing (method 2)
Rev. 1.0
52
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.5 Timing Signal Generating Circuit
This circuit generates a reference clock which is 832 times as large
as the horizontal synchronous signal frequency. It also generates
various timing signals on the basis of the reference clock, horizontal
synchronous signal and vertical synchronizing signal. The circuit
operates by setting bit 0 of data slicer control register 1 (address
00E016) to “1.”
The reference clock can be used as a display clock for OSD function
in addition to the data slicer. The HSYNC signal can be used as a
count source instead of the composite sync signal. However, when
the HSYNC signal is selected, the data slicer cannot be used. A count
source of the reference clock can be selected by bit 2 of data slicer
control register 1 (address 00E016).
For the pins HLF, connect a resistor and a capacitor as shown in
Figure 8.10.1. Make the length of wiring which is connected to these
pins as short as possible so that a leakage current may not be generated.
Note: It takes a few tens of milliseconds until the reference clock becomes
stable after the data slicer and the timing signal generating circuit are
started. In this period, various timing signals, Hsep signals and Vsep signals become unstable. For this reason, take stabilization time into consideration when programming.
Bit 5 of
DSC2
0
Composite
sync signal
1
1
A
B
Fig. 8.10.7 Determination of V-pulse Waveform
Rev. 1.0
53
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.6 Data Slice Line Specification Circuit
(1) Specification of data slice line
(3) Field determination
This circuit decides a line on which caption data is superimposed.
The line 21 (fixed), 1 appropriate line for a period of 1 field (total 2
line for a period of 1 field), and both fields (F1 and F2) are sliced
their data. The caption position register (address 00E616) is used
for each setting (refer to Table 8.10.1).
The counter is reset at the falling edge of Vsep and is incremented
by 1 every Hsep pulse. When the counter value matched the value
specified by bits 4 to 0 of the caption position register, this Hsep is
sliced.
The values of “0016” to “1F16” can be set in the caption position
register (at setting only 1 appropriate line). Figure 8.10.8 shows
the signals in the vertical blanking interval. Figure 8.10.9 shows
the structure of the caption position register.
The field determination flag can be read out by bit 3 of data slicer
control register 2. This flag charge at the falling edge of Vsep.
(2) Specification of line to set slice voltage
The reference voltage for slicing (slice voltage) is generated for
the clock run-in pulse in the particular line (refer to Table 8.10.1).
The field to generate slice voltage is specified by bit 1 of data
slicer control register 1. The line to generate slice voltage 1 field is
specified by bits 6, 7 of the caption position register (refer to
Table 8.10.1).
Vertical blanking interval
Video signal
Composite
video signal
1 appropriate line is set by
the caption position register Line 21
(when setting line 19)
Vsep
Hsep
Count value to be set in the caption position register (“0F 16” in this case)
Magnified
drawing
Hsep
Clock run-in
Composite video
signal
Start bit + 16-bit data
Start bit
Window for
deteminating
clock-run-in
Fig. 8.10.8 Signals in Vertical Blanking Interval
Rev. 1.0
54
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Caption Position Register
b7 b6 b5 b4 b3 b2 b1 b0
Caption Position Register (CPS) [Address 00E616]
B
0
to
4
5
Name
Functions
Caption data latch
completion flag 2
(CPS5)
6, 7 Slice line mode
specification bits
(in 1 field) (CPS6, CPS7)
After reset
0
Caption position
bits(CPS0 to CPS4)
R W
R W
0: Data is not latched yet and a Indeterminate R —
clock-run-in is not determined.
1: Data is latched and a
clock-run-in is determined.
Refer to the corresponding
Table (Table 8.10.1).
0
R W
Fig. 8.10.9 Caption Position Register
Table 8.10.1 Specification of Data Slice Line
CPS
b7
b6
0
0
0
1
1
0
1
1
Field and Line to Be Sliced Data
• Both fields of F1 and F2
• Line 21 and a line specified by bits 4 to 0 of CPS
(total 2 lines) (See note 2)
• Both fields of F1 and F2
• A line specified by bits 4 to 0 of CPS
(total 1 line) (See note 3)
• Both fields of F1 and F2
• Line 21 (total 1 line)
• Both fields of F1 and F2
• Line 21 and a line specified by bits 4 to 0 of CPS
(total 2 lines) (See note 2)
Field and Line to Generate Slice Voltage
• Field specified by bit 1 of DSC1
• Line 21 (total 1 line)
• Field specified by bit 1 of DSC1
• A line specified by bits 4 to 0 of CPS
(total 1 line) (See note 3)
• Field specified by bit 1 of DSC1
• Line 21 (total 1 line)
• Field specified by bit 1 of DSC1
• Line 21 and a line specified by bits 4 to 0 of CPS
(total 2 lines) (See note 2)
Notes 1: DSC1 is data slicer control register 1.
CPS is caption position register.
2: Set “0016” to “1016” to bits 4 to 0 of CPS.
3: Set “0016” to “1F16” to bits 4 to 0 of CPS.
Rev. 1.0
55
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.7 Reference Voltage Generating Circuit
and Comparator
The composite video signal clamped by the clamping circuit is input
to the reference voltage generating circuit and the comparator.
(1) Reference voltage generating circuit
This circuit generates a reference voltage (slice voltage) by using
the amplitude of the clock run-in pulse in line specified by the
data slice line specification circuit. Connect a capacitor between
the VHOLD pin and the VSS pin, and make the length of wiring as
short as possible so that a leakage current may not be generated.
(2) Comparator
The comparator compares the voltage of the composite video
signal with the voltage (reference voltage) generated in the reference voltage generating circuit, and converts the composite video
signal into a digital value.
8.10.8 Start Bit Detecting Circuit
This circuit detects a start bit at line decided in the data slice line
specification circuit.
The detection of a start bit is described below.
➀ A sampling clock is generated by dividing the reference clock output by the timing signal.
➁ A clock run-in pulse is detected by the sampling clock.
➂ After detection of the pulse, a start bit pattern is detected from the
comparator output.
8.10.9 Clock Run-in Determination Circuit
This circuit determinates clock run-in by counting the number of pulses
in a window of the composite video signal.
The reference clock count value in one pulse cycle is stored in bits 3
to 7 of the clock run-in detect register (address 00E416). Read out
these bits after the occurrence of a data slicer interrupt (refer to
“8.10.12 Interrupt Request Generating Circuit”).
Figure 8.10.10 shows the structure of clock run-in detect register.
Clock Run-in Detect Register
b7 b6 b5 b4 b3 b2 b1 b0
Clock run-in detect register (CRD) [Address 00E4 16]
B
0
to
2
3
to
7
Name
Functions
After reset R W
Test bits
Read-only
0
R —
Clock run-in detection bit
(CRD3 to CRD7)
Number of reference clocks to
be counted in one clock run-in
pulse period.
0
R —
Fig. 8.10.10 Clock Run-in Detect Register
Rev. 1.0
56
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.10 Data Clock Generating Circuit
This circuit generates a data clock synchronized with the start bit
detected in the start bit detecting circuit. The data clock stores caption data to the 16-bit shift register. When the 16-bit data has been
stored and the clock run-in determination circuit determines clock
run-in, the caption data latch completion flag is set. This flag is reset
at a falling of the vertical synchronous signal (Vsep).
Data Clock Position Register
b7 b6 b5 b4 b3 b2 b1 b0
0
1
0
Data clock position register (DPS) [Address 00E516]
B
Name
Functions
After reset R W
0
Fix this bit to “0.”
1
R W
1
Fix this bit to “1.”
0
R W
2
Fix this bit to “0.”
0
R W
3
Data clock position set
bits (DPS3 to DPS7)
1
R W
4
to
7
0
Fig. 8.10.11 Data Clock Position Register
Rev. 1.0
57
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.11 16-bit Shift Register
8.10.12 Interrupt Request Generating Circuit
The caption data converted into a digital value by the comparator is
stored into the 16-bit shift register in synchronization with the data
clock. The contents of the high-order 8 bits of the stored caption data
can be obtained by reading out data register 2 (address 00E316) and
data register 4 (address 00CF16). The contents of the low-order 8
bits can be obtained by reading out data register 1 (address 00E216)
and data register 3 (address 00CE16), respectively. These registers
are reset to “0” at a falling of Vsep. Read out data registers 1 and 2
after the occurrence of a data slicer interrupt (refer to “8.10.12 Interrupt Request Generating Circuit”).
The interrupt requests as shown in Table 8.10.3 are generated by
combination of the following bits; bits 6 and 7 of the caption position
register (address 00E616). Read out the contents of data registers 1
to 4 and the contents of bits 3 to 7 of the clock run-in detect register
after the occurrence of a data slicer interrupt request.
Table 8.10.2 Contents of Caption Data Latch Completion Flag and 16-bit Shift Register
Slice Line Specification Mode
CPS
Contents of Caption Data Latch Completion Flag
Contents of 16-bit Shift Register
bit 7
bit 6
Completion Flag 1
(bit 0 of DSC2)
Completion Flag 2
(bit 5 of CPS)
Caption Data
Registers 1, 2
Caption Data
Registers 3, 4
0
0
Line 21
A line specified by
bits 4 to 0 of CPS
16-bit data of line 21
16-bit data of a line specified by
bits 4 to 0 of CPS
0
1
A line specified by
bits 4 to 0 of CPS
Invalid
16-bit data of a line specified
by bits 4 to 0 of CPS
Invalid
1
0
Line 21
Invalid
16-bit data of line 21
Invalid
1
1
Line 21
A line specified by
bits 4 to 0 of CPS
16-bit data of line 21
16-bit data of a line specified by
bits 4 to 0 of CPS
CPS: Caption position register
DSC2: Data slicer control register 2
Table 8.10.3 Occurence Sources of Interrupt Request
Caption position register
b7
b6
0
0
1
0
1
1
Occurence Souces of Interrupt Request at End of Data Slice Line
After slicing line 21
After a line specified by bits 4 to 0 of CPS
After slicing line 21
After slicing line 21
Rev. 1.0
58
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.10.13 Synchronous Signal Counter
The synchronous signal counter counts the composite sync signal
taken out from a video signal in the data slicer circuit or the vertical
synchronous signal Vsep as a count source.
The count value in a certain time (T time) generated by f(XIN)/213 or
f(XIN)/213 is stored into the 5-bit latch. Accordingly, the latch value
changes in the cycle of T time. When the count value exceeds “1F16,”
“1F16” is stored into the latch.
The latch value can be obtained by reading out the sync pulse counter
register (address 00E916). A count source is selected by bit 5 of the
sync pulse counter register.
The synchronous signal counter is used when bit 0 of PWM mode
register 1 (address 020816).
Figure 8.10.12 shows the structure of the sync pulse counter and
Figure 8.10.13 shows the synchronous signal counter block diagram.
Sync Pulse Counter Register
b7 b6 b5 b4 b3 b2 b1 b0
Sync pulse counter register (HC) [Address 00E9 16]
B
Name
Functions
0
to
4
Count value (HC0 to HC4)
5
Count source (HC5)
0: HSYNC signal
1: Composite sync signal
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
After reset
R W
0
R —
0
R W
0
R —
Fig. 8.10.12 Sync Pulse Counter Register
f(XIN)/213
Composite
sync signal
Reset
HSYNC signal
b5
Selection gate : connected to black
side when reset.
5-bit counter
Counter
Latch (5 bits)
Sync pulse
counter register
Data bus
Fig. 8.10.13 Synchronous Signal Counter Block Diagram
Rev. 1.0
59
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11 OSD FUNCTIONS
Table 8.11.1 outlines the OSD functions.
This microcomputer incorporates an OSD circuit of 32 characters ✕
2 lines. And also, there are 2 display modes and they are selected by
a block unit. The display modes are selected by bits 0 and 1 of block
control register i (i = 1 and 2).
The features of each mode are described below.
Table 8.11.1 Features of Each Display Mode
Display mode
Parameter
CC mode
(Closed caption mode)
OSD mode (Border OFF)
(On-screen display mode)
32 characters ✕ 2 lines
Number of display characters
Dot structure
16 ✕ 26 dots (Character display area : 16 ✕ 20 dots)
Kinds of characters
Kinds of character sizes
16 ✕ 20 dots
254 kinds
1 kinds
8 kinds
Pre-divide ratio (See note)
✕ 2 (fixed)
✕ 2, ✕ 3
Dot size
1TC ✕ 1/2H
1TC ✕ 1/2H, 1TC ✕ 1H, 2TC ✕ 2H, 3TC ✕ 3H
Attribute
Character font coloring
Smooth italic, under line, flash
Border (black)
1 screen : 8 kinds (per character unit)
Character background coloring
1 screen : 8 kinds (per character unit)
OSD output
R, G, B
Raster coloring
Function
Possible (per character unit)
Auto solid space function
Window function
Display position
Display expansion (multiline display)
Horizontal: 128 levels, Vertical: 512 levels
Possible
Notes 1: The divide ratio of the frequency divider (the pre-divide circuit) is referred as “pre-divide ratio” hereafter.
2: The character size is specified with dot size and pre-divide ratio (refer to 8.11.2 Dot Size).
Rev. 1.0
60
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
The OSD circuit has an extended display mode. This mode allows
multiple lines (3 lines or more) to be displayed on the screen by interrupting the display each time one line is displayed and rewriting data
in the block for which display is terminated by software.
Figure 8.11.1 shows the configuration of OSD character. Figure 8.11.2
shows the block diagram of the OSD circuit. Figure 8.11.3 shows the
OSD control register. Figure 8.11.4 shows the block control register i.
CC mode
OSD mode
16 dots
'Blank area✽
26 dots
20 dots
20 dots
16 dots
'Underline area✽
'Blank area✽
✽: Displayed only in CCD mode.
Fig. 8.11.1 Configuration of OSD Character Display Area
Rev. 1.0
61
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Clock for OSD
OSC1 OSC2
Data slicer clock
HSYNC VSYNC
Display
oscillation
circuit
Control registers for OSD
OSD Control circuit
OSD control register
Horizontal position register
Block control register i
Vertical position register i
Window register i
I/O polarity control register
Raster color register
(address 00D016)
(address 00D116)
(addresses 00D216, 00D316)
(addresses 00D416, 00D516)
(addresses 00D616, 00D716)
(address 00D816)
(address 00D916)
RAM for OSD
2 bytes ✕ 32 characters ✕ 2 lines
ROM for OSD
16 dots ✕ 20 dots ✕ 254 characters
Shift register
16-bit
Output circuit
R
G
B
OUT1
OUT2
Data bus
Fig. 8.11.2 Block Diagram of OSD Circuit
Rev. 1.0
62
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
OSD Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0
OSD control register (OC) [Address 00D0 16]
B
Functions
Name
After reset R W
OSD control bit
(OC0) (See note)
Automatic solid space
control bit (OC1)
Window control bit
(OC2)
0 : All-blocks display off
1 : All-blocks display on
0 : OFF
1 : ON
0 : OFF
1 : ON
0
R W
0
R W
0
R W
CC mode clock
selection bit (OC3)
0 : Data slicer clock
1 : Clock from OSC1 pin
0
R W
4 OSD mode clock
selection bit (OC4)
0 : Data slicer clock
1 : Clock from OSC1 pin
0
R W
0
R W
0
R W
0
1
2
3
5, 6 OSC1 clock
selection bit
(OC5, OC6)
7 Fix this bit to “0.”
b6 b5
0 0: 32 kHz oscillating
0 1: Do not set.
1 0: LC oscillating,
Ceramic oscillating
1 1: Do not set.
Note: Even this bit is switched during display, the display screen
remains unchanged until a rising (falling) of the next V SYNC.
Fig. 8.11.3 OSD Control Register
Rev. 1.0
63
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Block Control register i
b7 b6 b5 b4 b3 b2 b1 b0
Block control register i (BCi) (i=1, 2) [Addresses 00D2
B
Name
0, 1 Display mode
selection bits
(BCi0, BCi1)
(See note 1)
2, 3 Dot size selection
bits (BCi2, BCi3)
b4
0
0
1
1
0
Pre-divide ratio
selection bit (BCi4)
and 00D3 16]
After reset
Functions
b1 b0
4
16
1
0: Display OFF
1: CC mode
0: OSD mode (Border OFF)
1: OSD mode (Border ON)
b3 b2 Pre-divide Ratio
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
✕2
✕3
Dot Size
R W
Indeterminate R W
Indeterminate R W
1Tc ✕ 1/2H
1Tc ✕ 1H
2Tc ✕ 2H
3Tc ✕ 3H
1Tc ✕ 1/2H Indeterminate
1Tc ✕ 1H
2Tc ✕ 2H
3Tc ✕ 3H
R W
5 OUT1/OUT2 output control 0: OUT1 output control
1: OUT2 output control
bit (BCi5) (See note 1)
Indeterminate R W
6 Vertical display start
position control bit
(BCi6)
BC16: Block 1
BC26: Block 1
Indeterminate R W
7
BC17: Window top boundary
BC27: Window bottom boundary
Indeterminate R W
Window top/bottom
boundary control bit
(BCi7)
Notes 1: Bit RA3 of OSD RAM controls OUT1 output when bit 5 is “0.”
Bit RA3 of OSD RAM controls OUT2 output when bit 5 is “1.”
2: Tc is OSD clock cycle divided in pre-divide circuit.
3: H is HSYNC.
Fig. 8.11.4 Block Control Register i
Rev. 1.0
64
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.1 Display Position
The display positions of characters are specified in units called a
“block.” There are 2 blocks, blocks 1 and 2. Up to 32 characters can
be displayed in each block (refer to “8.11.5 Memory for OSD”).
The display position of each block can be set in both horizontal and
vertical directions by software.
The display start position in the horizontal direction can be selected
for all blocks in common from 128-step display positions in units of
4TOSC (TOSC = OSD oscillation cycle).
The display start position in the vertical direction for each block can
be selected from 512-step display positions in units of 1 T H ( TH =
HSYNC cycle).
Blocks are displayed in conformance with the following rules:
• When the display position of block 1 is overlapped with that of block
2 (Figure 8.11.5 (b)), the block 1 is displayed on the front.
• When another block display position appears while one block is
displayed (Figure 8.11.5 (c)), the block with a larger set value as
the vertical display start position is displayed.
(HP)
VP1
Block 1
VP2
Block 2
(a) Example when each block is separated
(HP)
VP1 = VP2
Block 1
(Block 2 is not displayed)
(b) Example when block 2 overlaps with block 1
(HP)
VP1
VP2
Block 1
Block 2
(c) Example when block 2 overlaps in process of block 1
Note: VP1 or VP2 indicates the vertical display start position of display block 1 or 2.
Fig. 8.11.5 Display Position
Rev. 1.0
65
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
The vertical display start position is determined by counting the horizontal sync signal (HSYNC). At this time, when VSYNC and HSYNC are
positive polarity (negative polarity), it starts to count the rising edge
(falling edge) of HSYNC signal from after fixed cycle of rising edge
(falling edge) of VSYNC signal. So interval from rising edge (falling
edge) of VSYNC signal to rising edge (falling edge) of HSYNC signal
needs enough time (2 machine cycles or more) for avoiding jitter.
The polarity of HSYNC and VSYNC signals can select with the I/O polarity control register (address 00D816).
8 machine cycles
or more
VSYNC signal input
0.25 to 0.50 [µs]
( at f(XIN) = 8MHz)
VSYNC control
signal in
microcomputer
Period of counting
HSYNC signal
(See note 2)
HSYNC
signal input
8 machine cycles
or more
1
2
3
4
5
Not count
When bits 0 and 1 of the I/O polarity control register
(address 00D816) are set to “1” (negative polarity)
Notes 1 : The vertical position is determined by counting falling edge of HSYNC
signal after rising edge of VSYNC control signal in the microcomputer.
2 : Do not generate falling edge of HSYNC signal near rising edge of
VSYNC control signal in microcomputer to avoid jitter.
3 : The pulse width of VSYNC and HSYNC needs 8 machine cycles or
more.
Fig. 8.11.6 Supplement Explanation for Display Position
Rev. 1.0
66
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
The vertical display start position for each block can be set in 512
steps (where each step is 1TH (TH: HSYNC cycle)) as values “0016” to
“FF16” in vertical position register i (i = 1 and 2) (addresses 00D416
and 00D516) and values “0” or “1” in bit 6 of block control register i (i
= 1 and 2) (addresses 00D216 and 00D316). The vertical position
registers is shown in Figure 8.11.7.
Vertical Position Register i
b7 b6 b5 b4 b3 b2 b1 b0
Vertical position register i (VPi) (i = 1 and 2) [Addresses 00D416, 00D516]
B
Name
0
to
7
Vertical display start
position control bits
(VPi0 to VPi7)
(See note)
Functions
Vertical display start position =
2
TH ✕ (BCi6 ✕ 16 + n)
(n: setting value, TH: HSYNC cycle,
BCi6: bit 6 of block control register i)
After reset
R W
Inderterminate R W
Note: Set values except “0016” to VPi when BCi6 is “0.”
Fig. 8.11.7 Vertical Position Register i (i = 1 and 2)
Rev. 1.0
67
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
The horizontal display start position is common to all blocks, and can
be set in 128 steps (where 1 step is 4TOSC, TOSC being the OSD
oscillation cycle) as values “0016” to “FF16” in bits 0 to 6 of the horizontal position register (address 00D116). The horizontal position register is shown in Figure 8.11.8.
Horizontal Position Register
b7 b6 b5 b4 b3 b2 b1 b0
Horizontal position register (HP) [Address 00D1 16]
B
Name
Functions
Horizontal display start positions
128 steps (00 16 to 7F 16)
(1 step is 4T OSC)
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
After reset R W
0 Horizontal display start
to position control bits
6 (HP0 to HP6)
0
R W
7
0
R —
Note: The setting value synchronizes with the V SYNC.
Fig. 8.11.8 Horizontal Position Register
Notes 1 : 1TC (TC : OSD clock cycle divided in pre-divide circuit) gap occurs
between the horizontal display start position set by the horizontal
position register and the most left dot of the 1st block. Accordingly,
when 2 blocks have different pre-divide ratios, their horizontal display start position will not match.
2 : The horizontal start position is based on the OSD clock source cycle
selected for each block. Accordingly, when 2 blocks have different
OSD clock source cycles, their horizontal display start position will
not match.
3 : When setting “0016” to the horizontal position register, it needs approximately 62TOSC (= Tdef) interval from a rising edge (when negative polarity is selected) of HSYNC signal to the horizontal display start
position.
HSYNC
Note 1
Tdef
4TOSC ✕ N
1TC
Block 2 (Pre-divide ratio = 2, clock source = data slicer clock)
1TC
Block 3 (Pre-divide ratio = 3, clock source = data slicer clock)
Note 2
Tdef’ 4TOSC’
✕N
1TC
Block 4 (Pre-divide ratio = 3, clock source = OSC1)
N
1TC
TOSC
Tdef
: Value of horizontal position register (decimal notation)
: OSD clock cycle divided in pre-divide circuit
: OSD oscillation cycle
: 62 T OSC
Fig. 8.11.9 Notes on Horizontal Display Start Position
Rev. 1.0
68
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.2 Dot Size
The dot size can be selected by a block unit. The dot size in vertical
direction is determined by dividing HSYNC in the vertical dot size control circuit. The dot size in horizontal is determined by dividing the
following clock in the horizontal dot size control circuit : the clock
gained by dividing the OSD clock source (data slicer clock, OSC1) in
the pre-divide circuit. The clock cycle divided in the pre-divide circuit
is defined as 1TC.
The dot size of each block is specified by bits 2 to 4 of the block
control register i.
Refer to Figure 8.11.4 (the structure of the block control register).
The block diagram of dot size control circuit is shown in Figure 8.11.10.
“0”
OSC1
Clock cycle
= 1TC
Cycle ✕ 2
Synchronous
circuit
Data slicer clock
“1” BCi4
OC3 or OC4
Horizontal dot size
control circuit
Cycle ✕ 3
Pre-divide circuit
Vertical dot size
control circuit
HSYNC
OSD control circuit
Note: To use data slicer clock, set bit 0 of data slicer control register 1 to “1.”
Fig. 8.11.10 Block Diagram of Dot Size Control Circuit
1 dot
1TC
1/2H
1TC
2TC
3TC
S canning line ofF1(F2)
S canning line ofF2(F1)
1H
2H
3H
Fig. 8.11.11 Definition of Dot Sizes
Rev. 1.0
69
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.3 Clock for OSD
As a clock for display to be used for OSD, it is possible to select one
of the following 3 types.
• Data slicer clock output from the data slicer (approximately 26 MHz)
• OSC1 clock supplied from the pins OSC1 and OSC2
• Clock from the ceramic resonator or the LC oscillator from the pins
OSC1 and OSC2
This OSD clock for each block can be selected by the following bits
: bit 7 of the raster color register (address 00D916), bits 3 to 6 of the
clock source control register (addresses 00D016). A variety of character sizes can be obtained by combining dot sizes with OSD clocks.
When not using the pins OSC1 and OSC2 for the OSD clock I/O
pins, the pins can be used as sub-clock I/O pins or port P2.
Table 8.11.2 Setting for P26/OSC1/XCIN, P27/OSC2/XCOUT
Function
Register
b7 of raster color
OSD clock
I/O Pin
Sub-clock
I/O Pin
I/O
Port
0
0
1
register
OSD control
b6
1
0
1
register
b5
0
0
0
Data slicer clock
(See note)
Data slicer
circuit
“0”
CC mode block
“1”
OC3
“0”
OSD mode block
OSC1 clock
Ceramic · LC
“10”
OC4
“1”
OC6, OC5
Oscillating mode for OSD
Note : To use data slicer clock, set bit 0 of data slicer control register 1 to “1.”
Fig. 8.11.12 Block Diagram of OSD Selection Circuit
Rev. 1.0
70
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.4 Field Determination Display
To display the block with vertical dot size of 1/2H, whether an even
field or an odd field is determined through differences in a synchronizing signal waveform of interlacing system. The dot line 0 or 1 (refer to Figure 8.11.14) corresponding to the field is displayed alternately.
In the following, the field determination standard for the case where
both the horizontal sync signal and the vertical sync signal are negative-polarity inputs will be explained. A field determination is determined by detecting the time from a falling edge of the horizontal sync
signal until a falling edge of the VSYNC control signal (refer to Figure
8.11.6) in the microcomputer and then comparing this time with the
time of the previous field. When the time is longer than the comparing time, it is regarded as even field. When the time is shorter, it is
regarded as odd field
The contents of this field can be read out by the field determination
flag (bit 6 of the I/O polarity control register at address 00D816). A dot
line is specified by bit 5 of the I/O polarity control register (refer to
Figure 8.11.14).
However, the field determination flag read out from the CPU is fixed
to “0” at even field or “1” at odd field, regardless of bit 5.
I/O Polarity Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0
I/O polarity control register (PC) [Address 00D8 16]
B
Name
Functions
After reset R W
0
HSYNC input polarity
switch bit (PC0)
0 : Positive polarity input
1 : Negative polarity input
0
R W
1
VSYNC input polarity
switch bit (PC1)
0 : Positive polarity input
1 : Negative polarity input
0
R W
2
R, G, B output polarity
switch bit (PC2)
0 : Positive polarity output
1 : Negative polarity output
0
R W
3
OUT1 output polarity
switch bit (PC3)
0 : Positive polarity output
1 : Negative polarity output
0
R W
4
OUT2 output polarity
switch bit (PC4)
0 : Positive polarity output
1 : Negative polarity output
0
R W
5
Display dot line selection
bit (PC5) (See note)
0:“
0
R W
1
R —
0
R W
“
1:“
“
6
Field determination flag
(PC6)
7
Fix this bit to “0.”
” at even field
” at odd field
” at even field
” at odd field
0 : Even field
1 : Odd field
Note: Refer to the corresponding figure (8.11.14).
Fig. 8.11.13 I/O Polarity Control Register
Rev. 1.0
71
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Both H SYNC signal and V SYNC signal are negative-polarity input
HSYNC
Field
VSYNC and
V SYNC
control
signal
in microcomputer
Upper :
VSYNC signal
(n |1) field
(Odd-numbered)
Field
Display dot line
determination
selection bit
flag(Note)
Odd
T1
0.25 to 0.50[ ˚s] at
f(XIN )
8 MHz
(n) field
(Even-numbered)
Even
(n {1) field
(Odd-numbered)
Odd
When using the field determination flag, be sure to set bit 0 of the PWM mode register 1 (address 0208
2 3 4 5
6 7 8 9 10 11 12 13 14 15 16
1 2
Dot line 1
1
Dot line 0
0
Dot line 0
1
Dot line 1
1 (T3 < T2)
T3
1
0
0 (T2 > T1)
T2
Lower :
VSYNC control
signal in
microcomputer
Display dot line
3 4 5
16)
to “0.”
6 7 8 9 10 11 12 13 14 15 16
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OSD mode
When the display dot line selection bit is “0,”
the “
” font is displayed at even field, the
“
” font is displayed at odd field. Bit 6 of the
I/O polarity control register can be read as the
field determination flag : “1” is read at odd field,
“0” is read at even field.
24
25
26
CC mode
OSD ROM font configuration diagram
Note : The field determination flag changes at a rising edge of the V SYNC control signal (negative-polarity input) in
the microcomputer.
Fig. 8.11.14 Relation between Field Determination Flag and Display Font
Rev. 1.0
72
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.5 Memory for OSD
(1) OSD ROM (addresses 140016 to 3BFF16)
There are 2 types of memory for OSD : OSD ROM used to store
character dot data and OSD RAM used to specify the characters and
colors to be displayed.
<M37273M8-XXXSP, M37273E8SP>
OSD ROM : addresses 140016 to 3BFF16
OSD RAM : addresses 080016 to 087F16
<M37273MF-XXXSP, M37273EFSP>
OSD ROM : addresses 1140016 to 13BFF16
OSD RAM : addresses 080016 to 087F16
The dot pattern data for OSD characters is stored in OSD ROM. To
specify the kinds of the character font, it is necessary to write the
character code into the OSD RAM.
Data of the character font is specified shown in Figure 8.11.15.
OSD ROM address of character font data
OSD ROM
address bit
AD16 AD15 AD14 AD13 AD12 AD11 AD10
Line number/character 1 (Note)
code/font bit
Line number
Character code
Font bit
0
0
AD9
AD8
AD7
Line number
AD6
AD5
AD4
Character code
AD3
AD2
AD1
AD0
Font
bit
“0A16” to “1D16”
“0016” to “FF16” (“7F16” and “8016” cannot be used)
0 : Left area
1 : Right area
Note: Only M37273MF-XXXSP and M37273EFSP have AD16.
Line
number
b7
Left
area
b0 b7
Right
area
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
b0
Data in
OSD
ROM
000016
7FF016
7FF816
601C16
600C16
600C16
600C16
600C16
601C16
7FF816
7FF016
630016
638016
61C016
60E016
607016
603816
601C16
600C16
000016
Character font
Fig. 8.11.15 Character Font Data Storing Address
Rev. 1.0
73
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(1)Mask version (M37273M8-XXXSP, M37273E8SP)
Set “FF16” to the area (We stores the test data to this area and the different
data from “FF16” is stored for the actual products.) When using our font
editor, the test data is written automatically.
(2)EPROM version (M37273MF-XXXSP, M37273EFSP)
Set the test data to the area. When using our font editor, the test data
is written automatically.
■M37273E8SP
<“FF16”> address (test data)
<“8016”> address (test data)
14FE16 (0916), 14FF16 (5116)
16FE16 (0016), 16FF16 (5216)
18FE16 (1216), 18FF16 (5316)
1AFE16 (0016), 1AFF16 (5416)
1CFE16 (2416), 1CFF16 (5516)
1EFE16 (0016), 1EFF16 (5616)
20FE16 (8816), 20FF16 (5716)
22FE16 (0016), 22FF16 (5816)
24FE16 (9016), 24FF16 (5916)
26FE16 (4816), 26FF16 (5A16)
28FE16 (2416), 28FF16 (5B16)
2AFE16 (0016), 2AFF16 (5C16)
2CFE16 (2416), 2CFF16 (5D16)
2EFE16 (4816), 2EFF16 (5E16)
30FE16 (0016), 30FF16 (5F16)
32FE16 (4816), 32FF16 (5016)
34FE16 (9016), 34FF16 (5116)
36FE16 (0016), 36FF16 (5216)
38FE16 (0116), 38FF16 (5316)
3AFE16 (8016), 3AFF16 (5416)
150016 (9016), 150116 (A116)
170016 (0016), 170116 (A216)
190016 (4816), 190116 (A316)
1B0016 (0016), 1B0116 (A416)
1D0016 (2416), 1D0116 (A516)
1F0016 (0016), 1F0116 (A616)
210016 (1216), 210116 (A716)
230016 (0016), 230116 (A816)
250016 (0916), 250116 (A916)
270016 (0016), 270116 (AA16)
290016 (8116), 290116 (AB16)
2B0016 (1816), 2B0116 (AC16)
2D0016 (0016), 2D0116 (AD16)
2F0016 (4216), 2F0116 (AE16)
310016 (2416), 310116 (AF16)
330016 (0016), 330116 (B016)
350016 (8116), 350116 (B116)
370016 (0C16), 370116 (B216)
390016 (0616), 390116 (B316)
3B0016 (0016), 3B0116 (B416)
■M37273EFSP
<“7F16”> address (test data)
<“8016”> address (test data)
<Transparent space font data storing area>
■ M37273M8-XXXSP, M37273E8SP
addresses 100016 + (4 + 2n) ✕ 10016 + 1216 to
100016 + (4 + 2n) ✕ 10016 + 1316
(n = 0 to 19)
 addresses 141216 and 141316 


 addresses 161216 and 161316 




 addresses 381216 and 381316 
 addresses 3A1216 and 3A1316


…
<Test data storing area>
■ M37273M8-XXXSP, M37273E8SP
addresses 100016 + (4 + 2n) ✕ 10016 + FE16 to
100016 + (5 + 2n) ✕ 10016 + 0116
(n = 0 to 19)
■ M37273MF-XXXSP, M37273EFSP
addresses 1100016 + (4 + 2n) ✕ 10016 + FE16 to
1100016 + (5 + 2n) ✕ 10016 + 0116
(n = 0 to 19)
2 : The character code “0916” is used for “transparent space” when
displaying Closed Caption.
Therefore, set “0016” to the 40-byte addresses corresponding to the
character code “0916.”
■ M37273MF-XXXSP, M37273EFSP
addresses 1100016 + (4 + 2n) ✕ 10016 + 1216 to
1100016 + (4 + 2n) ✕ 10016 + 1316
(n = 0 to 19)


 addresses 1141216 and 1141316 
 addresses 1161216 and 1161316 




 addresses 1381216 and 1381316 


 addresses 13A1216 and 13A1316
…
Notes 1 : The 80-byte addresses corresponding to the character code “7F16”
and “8016” in OSD ROM are the test data storing area. Set data to
the area as follows.
114FE16 (0916), 114FF16 (5116) 1150016 (9016), 1150116 (A116)
116FE16 (0016), 116FF16 (5216) 1170016 (0016), 1170116 (A216)
118FE16 (1216), 118FF16 (5316) 1190016 (4816), 1190116 (A316)
11AFE16 (0016), 11AFF16 (5416) 11B0016 (0016), 11B0116 (A416)
11CFE16 (2416), 11CFF16 (5516) 11D0016 (2416), 11D0116 (A516)
11EFE16 (0016), 11EFF16 (5616) 11F0016 (0016), 11F0116 (A616)
120FE16 (8816), 120FF16 (5716) 1210016 (1216), 1210116 (A716)
122FE16 (0016), 122FF16 (5816) 1230016 (0016), 1230116 (A816)
124FE16 (9016), 124FF16 (5916) 1250016 (0916), 1250116 (A916)
126FE16 (4816), 126FF16 (5A16) 1270016 (0016), 1270116 (AA16)
128FE16 (2416), 128FF16 (5B16) 1290016 (8116), 1290116 (AB16)
12AFE16 (0016), 12AFF16 (5C16) 12B0016 (1816), 12B0116 (AC16)
12CFE16 (2416), 12CFF16 (5D16) 12D0016 (0016), 12D0116 (AD16)
12EFE16 (4816), 12EFF16 (5E16) 12F0016 (4216), 12F0116 (AE16)
130FE16 (0016), 130FF16 (5F16) 1310016 (2416), 1310116 (AF16)
132FE16 (4816), 132FF16 (5016) 1330016 (0016), 1330116 (B016)
134FE16 (9016), 134FF16 (5116) 1350016 (8116), 1350116 (B116)
136FE16 (0016), 136FF16 (5216) 1370016 (0C16), 1370116 (B216)
138FE16 (0116), 138FF16 (5316) 1390016 (0616), 1390116 (B316)
13AFE16 (8016), 13AFF16 (5416) 13B0016 (0016), 13B0116 (B416)
Rev. 1.0
74
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(2) OSD RAM
The RAM for OSD is allocated at addresses 080016 to 087F16, and
is divided into a display character code specification part, color code
1 specification part, and color code 2 specification part for each block.
Table 8.11.3 shows the contents of the OSD RAM.
For example, to display 1 character position (the left edge) in block
1, write the character code in address 080016, write the color code 1
at 082016.
The structure of the OSD RAM is shown in Figure 8.11.16.
Table 8.11.3 Contents of OSD RAM
Display Position (from left)
Block
1st character
2nd character
3rd character
Block 1
:
30th character
31st character
32nd character
1st character
2nd character
3rd character
:
Block 2
30th character
31st character
32nd character
Character Code Specification
080016
080116
080216
:
081D16
081E16
081F16
084016
084116
084216
:
085D16
085E16
085F16
Color Code Specification
082016
082116
082216
:
083D16
083E16
083F16
086016
086116
086216
:
087D16
087E16
087F16
Rev. 1.0
75
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Blocks 1, 2
b7
b0
b7
b0
RA6 RA5 RA4 RA3 RA2 RA1 RA0 RF7 RF6 RF5 RF4 RF3 RF2 RF1
RF0
(See note 1)
Color code 1
Character code (See note 3)
CC mode
Bit
OSD mode
Bit name
Function
Bit name
Function
Character code
Character code in
Character code
Character code in
RF0
RF1
RF2
RF3
RF4
OSD ROM
RF5
OSD ROM
RF6
RF7
RA0
RA1
RA2
RA3
RA4
Control of
0: Color signal output OFF
Control of
0: Color signal output OFF
character color R
1: Color signal output ON
character color R
1: Color signal output ON
Control of
Control of
character color G
character color G
Control of
Control of
character color B
character color B
OUT1/OUT2 control
Flash control
RA5
Underline control
RA6
Italic control
(See note 2)
OUT1/OUT2 control
(See note 2)
0: Flash OFF
Control of
0: Color signal output OFF
1: Flash ON
background color R
1: Color signal output ON
0: Underline OFF
Control of
1: Underline ON
background color G
0: Italic OFF
Control of
1: Italic ON
background color B
Notes 1: Read value of bits 7 of the color code is “0.”
2: For OUT1/OUT2 control, refer to “8.11.8 OUT1/OUT2 signal.”
3: “7F16” and “8016” cannot be used as character code.
Fig. 8.11.16 Bit structure of OSD RAM
Rev. 1.0
76
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.6 Character color
8.11.7 Character background color
The color for each character is displayed by the color code.
<7 kinds>
Specified by bits 0 (R), 1 (G), and 2 (B) of the color code
The character background color can be displayed in the character
display area only in the OSD mode. The character background color
for each character is specified by the color code.
<7 kinds>
Specified by bits 4 (R), 5 (G), and 6 (B) of the color code
Note : The character background color is displayed in the following part :
(character display area)–(character font)–(border).
Accordingly, the character background color does not mix with these
color signal.
Rev. 1.0
77
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.8 OUT1, OUT2 signals
The OUT1, OUT2 signals are used to control the luminance of the
video signal. The output waveform of the OUT1, OUT2 signals is
controlled by display mode, bit 5 of the block control register i (refer
to Figure 8.11.4) and RA3 of OSD RAM. The setting values for
controlling OUT1, OUT2 and the corresponding output waveform is
shown in Figure 8.11.17.
Note : When OUT2 signal is output, set bit 7 of OSD port control register (refer
to Figure 8.11.28) to “1.”
A
Block Control OUT1/OUT2
Register i
Display
Control
Mode OUT1/OUT2 Output
RA3 of
Control Bit (b5)
OSD RAM
0
(OUT1 output
is controlled
0
by RA3)
1
A'
Output Waveform (A-A')
OUT1 = FONT/BORDER
OUT2 = “L”
OUT1 = AREA
OUT2 = “L”
OSD
1
(OUT2 output
is controlled
by RA3)
0
0
(OUT1 output
is controlled
by RA3)
0
OUT1 = FONT/BORDER
OUT2 = “L”
1
OUT1 = FONT/BORDER
OUT2 = AREA
OUT1 = FONT
1
OUT2 = “L”
OUT1 = AREA
OUT2 = “L”
CC
1
(OUT2 output
is controlled
by RA3)
0
OUT1 = FONT
OUT2 = “L”
OUT1 = FONT
1
OUT2 = AREA
Notes 1 : FONT/BORDER.....In the OSD mode (Border ON), OUT1 outputs to the area of font and border.
In the OSD mode (Border OFF), OUT1 outputs to only the font area.
AREA..................... OUT1/OUT2 outputs to entire display area of character.
FONT..................... In the CC mode, OUT1 outputs to font area.
2 : When the automatic solid space function is OFF in the CC mode, AREA outputs according to bit 3 of color code.
When it is ON, the solid space is automatically output by a character code regardless of RA3.
Fig. 8.11.17 Setting Value for Controlling OUT1, OUT2 and Corresponding Output Waveform
Rev. 1.0
78
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.9 Attribute
The attributes (border, flash, underline, italic) are controlled to the
character font. The attributes to be controlled are different depending on each mode.
CC mode ..................... Flash, underline, italic (per character unit)
OSD mode .................. Border (per character unit)
(1) Under line
The underline is output at the 23th and 24th dots in vertical direction
only in the CC mode. The underline is controlled by RA5 of OSD
RAM. The color of underline is the same color as that of the character font.
(2) Flash
The character font and the underline are flashed only in the CC mode.
The flash is controlled by RA4 of OSD RAM. As for character font
part, the character output part is flashed, the character background
part is not flashed. The flash cycle bases on the VSYNC count.
• VSYNC cycle ✕ 48 ≈ 800 ms (at display ON)
• VSYNC cycle ✕ 16 ≈ 267 ms (at display OFF)
(3) Italic
The italic is made by slanting the font stored in OSD ROM to the right
only in the CC mode. The italic is controlled by RA6 of OSD RAM.
The display example of the italic and underline is shown in Figure
8.11.8. In this case, “R” is displayed.
Notes 1: When setting both the italic and the flash, the italic character flashes.
2: The boundary of character color is displayed in italic. However, the
boundary of character background color is not affected by the italic
(refer to Figure 8.11.19).
3: The adjacent character (one side or both side) to an italic character is
displayed in italic even when the character is not specified to display
in italic (refer to Figure 8.11.19).
Rev. 1.0
79
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Color code
Color code
Bit 6
(RA6)
Bit 5
(RA5)
Bit 6
(RA6)
Bit 5
(RA5)
0
0
1
0
(a) Ordinary
(b) Under line
Color code
Color code
Bit 6
(RA6)
Bit 5
(RA5)
Bit 6
(RA6)
Bit 5
(RA5)
0
1
0
1
(c) Italic (pre-divide ratio = 1)
(d) Italic (pre-divide ratio = 2)
Color code
flash
flash
flash
ON
Bit 6
(RA6)
Bit 5
(RA5)
Bit 6
(RA6)
1
1
1
ON
OFF
OFF
(e) Under line amd Italic and flash
Fig. 8.11.18 Example of Attribute Display (in CC Mode)
Rev. 1.0
80
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
26th chracter
(Refer to “8.11.9 Notes 2, 3”)
RA6 of
OSD RAM
1
0
0
(Refer to “8.11.9 Notes 2, 3”)
1
1
0
1
Notes 1 : The dotted line is the boundary of character color.
2 : When bit 1 of OSD control register is “0.”
Fig. 8.11.19 Example of Italic Display
Rev. 1.0
81
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
(4) Border
The border is output around of character font (all bordered) in the
OSD mode. The border ON/OFF is controlled by bit 0 and 1 of the
block control register i (refer to Figure 8.11.4).
The OUT1 signal is used for border output.
The horizontal size (x) of border is 1TC (OSD clock cycle divided in
pre-divide circuit) regardless of the character font dot size. The vertical size (y) different depending on the screen scan mode and the
vertical dot size of character font.
Notes 1 : The border dot area is the shaded area as shown in Figure 8.11.20.
2 : When the border dot overlaps on the next character font, the character font has priority (refer to Figure 8.11.22 A).
When the border dot overlaps on the next character back ground, the
border has priority (refer to Figure 8.11.22 B).
3 : The border in vertical out of character area is not displayed (refer to
Figure 8.11.22).
OSD mode
Character
font area
20 dots
16 dots
All bordered
1 dot width of border
1 dot width of border
Fig. 8.11.20 Example of Border Display
y
x
Border dot size
Vertical dot size of
character font
Horizontal size (x)
Vertical size (y)
1/2H
1H, 2H, 3H
1Tc (OSD clock cycle divided
in pre-divide circuit)
1/2H
1H
Fig. 8.11.21 Horizontal and Vertical Size of Border
Rev. 1.0
82
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Character boundary
B
Character boundary
A
Character boundary
B
Fig. 8.11.22 Border Priority
Rev. 1.0
83
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.10 Multiline Display
This microcomputer can ordinarily display 2 lines on the CRT screen
by displaying 2 blocks at different vertical positions. In addition, it can
display up to 16 lines by using OSD interrupts.
An OSD interrupt request occurs at the point at which display of each
block has been completed. In other words, when a scanning line
reaches the point of the display position (specified by the vertical
position registers) of a certain block, the character display of that
block starts, and an interrupt occurs at the point at which the scanning line exceeds the block.
Notes 1: An OSD interrupt does not occur at the end of display when the block
is not displayed. In other words, if a block is set to off display by the
display control bit of the block control register (addresses 00D216,
00D316), an OSD interrupt request does not occur (refer to Figure
8.11.23 (A)).
2: When another block display appeares while one block is displayed,
an OSD interrupt request occurs only once at the end of the another
block display (refer to Figure 8.11.23 (B)).
3: On the screen setting window, an OSD interrupt occurs even at the
end of the CC mode block (off display) out of window (refer to Figure
8.11.23 (C)).
Block 1 (on display)
“OSD interrupt request”
Block 1 (on display)
“OSD interrupt request”
Block 2 (on display)
“OSD interrupt request”
Block 2 (on display)
“OSD interrupt request”
Block 1’ (off display)
No
“OSD interrupt request”
No
“OSD interrupt request”
Block 1’ (on display)
Block 2’ (on display)
“OSD interrupt request”
“OSD interrupt request”
On display (OSD interrupt request occurs
at the end of block display)
Block 2’ (off display)
Off display (OSD interrupt request does
not occur at the end of block display)
(A)
Block 1
“OSD interrupt request”
Block 1
Block 2
No
“OSD interrupt request”
Block 2
“OSD interrupt request”
“OSD interrupt request”
Block 1’
“OSD interrupt request”
Window
In CC mode
(B)
(C)
Fig. 8.11.23 Note on Occurence of OSD Interrupt
Rev. 1.0
84
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.11 Automatic Solid Space Function
This function generates automatically the solid space (OUT1 or OUT2
blank output) of the character area in the CC mode.
The solid space is output in the following area :
• Any character area except character code “0916 ”
• Character area on the left and right sides of the above character
This function is turned on and off by bit 1 of the OSD control register
(refer to Figure 8.11.3).
Notes : The character code “0916” is used for “transparent space” when displaying Closed Caption.
Therefore, set “0016” to the 40-byte addresses corresponding to the
character code “0916.”
<Transparent space font data storing area>
■ M37273M8-XXXSP, M37273E8SP
addresses 100016 + (4 + 2n) ✕ 10016 + 1216 to
100016 + (4 + 2n) ✕ 10016 + 1316
(n = 0 to 19)
…
 addresses 141216 and 141316 


 addresses 161216 and 161316 




 addresses 381216 and 381316 
 addresses 3A1216 and 3A1316


■ M37273MF-XXXSP, M37273EFSP
addresses 1100016 + (4 + 2n) ✕ 10016 + 1216 to
1100016 + (4 + 2n) ✕ 10016 + 1316
(n = 0 to 19)
…
 addresses 1141216 and 1141316 


 addresses 1161216 and 1161316 




 addresses 1381216 and 1381316 
 addresses 13A1216 and 13A1316 


When setting the character code “0516” as the character A, “0616” as the character B.
(OSD RAM)
05 09 09 09 06 06
16
16
16
16
16
• • •
16
06 09 09 06
16
16
16
16
(Display screen)
• • •
1st
character
2nd
character
No blank output
31st
character
32nd
character
The solid space is automatically output on the left side of the 1st character and on the right side
of the 32nd character by setting the 1st and 32nd of the character code.
Fig. 8.11.24 Display Screen Example of Automatic Solid Space
Rev. 1.0
85
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.12 Window Function
This function sets the top and bottom boundary of display limit on a
screen. The window function is valid only in the CC mode. The top
boundary is set by the window registers 1 and bit 7 of block control
register 1. The bottom boundary is set by window registers 1 and bit
7 of block control register 2. This function is turned on and off by bit
2 of the OSD control register (refer to Figure 8.11.3).
The window registers 1 and 2 is shown in Figures 8.11.26 and 8.11.27.
A B C D E
OSD mode
F
CC mode
G H
K L
I
J
M N O
P Q R S T
U V W X Y
CC mode
Top
boundary
of window
Window
CC mode
OSD mode
Bottom
boundary
of window
Screen
Fig. 8.11.25 Example of Window Function
Rev. 1.0
86
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Window Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Window register 1 (WN1) [Address 00D616]
Name
B
0
to
7
Window top boundary
control bits
(WN10 to WN17)
Functions
Window top border position =
2
TH ✕ (BC17 ✕ 16 + n)
(n: setting value, TH: HSYNC cycle,
BC17: bit 7 of block control register 1)
After reset
R W
Inderterminate R W
Notes 1: Set values except “0016” to WN1 when BC17 is “0.”
2: Set values fit for the following condition: WN1 < WN2.
Fig. 8.11.26 Window Register 1
Window Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Window register 2 (WN2) [Address 00D716]
B
0
to
7
Name
Window bottom boundary
control bits
(WN20 to WN27)
Functions
Window bottom border position =
2
TH ✕ (BC27 ✕ 16 + n)
(n: setting value, TH: HSYNC cycle,
BC27: bit 7 of block control register 2)
After reset
R W
Inderterminate R W
Note: Set values fit for the following condition: WN1 < WN2.
Fig. 8.11.27 Window Register 2
Rev. 1.0
87
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.13 OSD Output Pin Control
The OSD output pins R, G, B and OUT1 can also function as ports
P52–P55. Set corresponding bit of the OSD port control register (address 00CB16) to “0” to specify these pins as OSD output pins, or set
it to “1” to specify it as a general-purpose port P5.
The OUT2 can also function as port P10. Set bit 0 of the port P1
direction register (address 00C316) to “1” (output mode). After that,
set bit 7 of the OSD port control register to “1” to specify the pin as
OSD output pin, or set it to “0” to specify as port P10.
The input polarity of the HSYNC, VSYNC and output polarity of signals
R, G, B, OUT1 and OUT2 can be specified with the I/O polarity control register (address 00D8) . Set a bit to “0” to specify positive polarity; set it to “1” to specify negative polarity (refer to Figure 8.11.13).
The structure of the OSD port control register is shown in Figure
8.11.28.
OSD Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
OSD port control register (PF ) [Address 00CB16]
B
Name
Functions
0, 1 Fix these bits to “0.”
After reset R W
0
R —
2
Port P52 output signal
selection bit (PF2)
0 : R signal output
1 : Port P52 output
0
R W
3
Port P53 output signal
selection bit (PF3)
0 : G signal output
1 : Port P53 output
0
R W
4
Port P54 output signal
selection bit (PF4)
0 : B signal output
1 : Port P54 output
0
R W
5
Port P55 output signal
selection bit (PF5)
0 : OUT1 signal output
1 : Port P53 output
0
R W
6
Nothing is assigned. This bit is write disable bit.
When this bit is read out, the value is “0.”
0
R —
7
Port P10 output signal
selection bit (PF7)
0
R W
0 : Port P10 output
1 : OUT2 signal output
Fig. 8.11.28 OSD Port Control Register
Rev. 1.0
88
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.11.14 Raster Coloring Function
An entire screen (raster) can be colored by setting the bits 4 to 0 of
the raster color register. Since each of the R, G, B, OUT1, and OUT2
pins can be switched to raster coloring output, 8 raster colors can be
obtained.
When the character color/the character background color overlaps
with the raster color, the color (R, G, B, OUT1, OUT2), specified for
the character color/the character background color, takes priority of
the raster color. This ensures that character color/character background color is not mixed with the raster color.
The raster color register is shown in Figure 8.11.29, the example of
raster coloring is shown in Figure 8.11.30.
Raster Color Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
Raster color register (RC) [Address 00D9 16]
B
Name
Functions
After reset R W
Raster color R
control bit (RC0)
Raster color G
control bit (RC1)
Raster color B
control bit (RC2)
0 : No output
1 : Output
0 : No output
1 : Output
0 : No output
1 : Output
0
R W
0
R W
0
R W
Raster color OUT1
control bit (RC3)
0 : No output
1 : Output
0
R W
4 Raster color OUT2
control bit (RC4)
0 : No output
1 : Output
0
R W
0
R W
0
R W
0
1
2
3
5, 6 Fix these bits to “0.”
7 Port function
selection bit (RC7)
0 : OSC1/X CIN, OSC2/X COUT
1 : P2 6, P27
Note: Either OSD clock source or 32 kHz oscillating clock is
selected by bits 5 and 6 of the OSD control register.
Fig. 8.11.29 Raster Color Register
Rev. 1.0
89
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
: Character color “RED” (R + OUT1 + OUT2)
: Border color “BLACK” (OUT1 + OUT2)
: Background color “MAGENTA” (R + B + OUT1 + OUT2)
: Raster color “BLUE” (B + OUT1 + OUT2)
A
A'
HSYNC
OUT1
OUT2
R
Signals
across
A-A'
G
B
Fig. 8.11.30 Example of Raster Coloring
Rev. 1.0
90
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.12 SOFTWARE RUNAWAY DETECT FUNCTION
This microcomputer has a function to decode undefined instructions
to detect a software runaway.
When an undefined op-code is input to the CPU as an instruction
code during operation, the following processing is done.
➀ The CPU generates an undefined instruction decoding signal.
➁ The device is internally reset because of occurrence of the undefined instruction decoding signal.
➂ As a result of internal reset, the same reset processing as in the
case of ordinary reset operation is done, and the program restarts
from the reset vector.
Note, however, that the software runaway detecting function cannot
be invalid.
φ
SYNC
Address
Data
PC
01,S
?
?
01,S–1
PCH
PCL
FFFE16
01,S–2
PS
ADH,
ADL
FFFF16
ADL
ADH
Reset sequence
Undefined instruction decoding signal
occurs.Internal reset signal occurs.
: Undefined instruction decode
: Invalid
PC : Program counter
S : Stack pointer
ADL, ADH : Jump destination address of reset
?
Fig.8.12.1 Sequence at Detecting Software Runaway Detection
Rev. 1.0
91
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.13. RESET CIRCUIT
When the oscillation of a quartz-crystal oscillator or a ceramic resonator is stable and the power source voltage is 5 V ± 10 %, hold the
RESET pin at LOW for 2 µs or more, then return is to HIGH. Then, as
shown in Figure 8.13.2, reset is released and the program starts form
the address formed by using the content of address FFFF 16 as the
high-order address and the content of the address FFFE16 as the
low-order address. The internal state of microcomputer at reset are
shown in Figures 8.2.3 to 8.2.6.
An example of the reset circuit is shown in Figure 8.13.1.
The reset input voltage must be kept 0.9 V or less until the power
source voltage surpasses 4.5 V.
Poweron
4 .5 V
Power source voltage 0 V
0 .9 V
Reset input voltage 0 V
Vcc
1
5
M51 953AL
RESET
4
3
0.1 µF
Vss
Microcomputer
Fig.8.13.1 Example of Reset Circuit
XIN
φ
RESET
Internal RESET
SYNC
Address
?
?
01, S
01, S-1 01, S-2
FFFE
FFFF
ADH,
ADL
Reset address from the vector table
Data
?
32768 count of XIN
clock cycle (See note 3)
?
?
?
?
ADL
ADH
Notes 1 : f(XIN) and f(φ) are in the relation : f(XIN) = 2·f (φ).
2 : A question mark (?) indicates an undefined state that
depends on the previous state.
3 : Immediately after a reset, timer 3 and timer 4 are
connected by hardware. At this time, “FF16” is set
in timer 3 and “0716” is set to timer 4. Timer 3 counts down
with f(XIN)/16, and reset state is released by the timer 4
overflow signal.
Fig.8.13.2 Reset Sequence
Rev. 1.0
92
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.14 CLOCK GENERATING CIRCUIT
(3) Low-speed Mode
This microcomputer has 2 built-in oscillation circuits. An oscillation
circuit can be formed by connecting a resonator between XIN and
XOUT (XCIN and XCOUT). Use the circuit constants in accordance with
the resonator manufacturer’s recommended values. No external resistor is needed between XIN and XOUT since a feed-back resistor
exists on-chip. However, an external feed-back resistor is needed
between XCIN and XCOUT. When using XCIN-XCOUT as sub-clock,
clear bits 5 and 6 of the OSD control register to “0.” To supply a clock
signal externally, input it to the XIN (XCIN) pin and make the XOUT
(XCOUT) pin open. When not using XCIN clock, connect the XCIN to
VSS and make the XCOUT pin open.
After reset has completed, the internal clock φ is half the frequency of
XIN. Immediately after poweron, both the XIN and XCIN clock start
oscillating. To set the internal clock φ to low-speed operation mode,
set bit 7 of the CPU mode register to “1.”
If the internal clock is generated from the sub-clock (XCIN), a low
power consumption operation can be realized by stopping only the
main clock XIN. To stop the main clock, set bit 6 (CM6) of the CPU
mode register (00FB16) to “1.” When the main clock XIN is restarted,
the program must allow enough time to for oscillation to stabilize.
Note that in low-power-consumption mode the XCIN-XCOUT drivability
can be reduced, allowing even lower power consumption. To reduce
the XCIN-XCOUT drivability, clear bit 5 (CM5) of the CPU mode register (00FB16) to “0.” At reset, this bit is set to “1” and strong drivability
is selected to help the oscillation to start. When an STP instruction is
executed, set this bit to “1” by software before executing.
Microcomputer
8.14.1 OSCILLATION CONTROL
(1) Stop Mode
The built-in clock generating circuit is shown in Figure 120. When the
STP instruction is executed, the internal clock φ stops at HIGH. At
the same time, timers 3 and 4 are connected by hardware and “FF16”
is set in timer 3 and “0716” is set in timer 4. Select f(XIN)/16 or f(XCIN)/
16 as the timer 3 count source (set both bit 0 of the timer mode
register 2 and bit 6 at address 00C716 to “0” before the execution of
the STP instruction). Moreover, set the timer 3 and timer 4 interrupt
enable bits to disabled (“0”) before execution of the STP instruction.
The oscillator restarts when external interrupt is accepted. However,
the internal clock φ keeps its HIGH level until timer 4 overflows, allowing time for oscillation stabilization when a ceramic resonator or a
quartz-crystal oscillator is used.
XCIN
XCOUT
Rf
CCIN
XOUT
Rd
CCOUT
CIN
COUT
Fig.8.14.1 Ceramic Resonator Circuit Example
Microcomputer
(2) Wait Mode
XCIN
When the WIT instruction is executed, the internal clock φ stops in
the HIGH level but the oscillator continues running. This wait state is
released at reset or when an interrupt is accepted (See note). Since
the oscillator does not stop, the next instruction can be executed at
once.
Note: In the wait mode, the following interrupts are invalid.
• VSYNC interrupt
• OSD interrupt
• All timer interrupts using external clock input from port pin as count
source
• All timer interrupts using f(XIN)/2 or f(XCIN)/2 as count source
• All timer interrupts using f(XIN)/4096 or f(XCIN)/4096 as count source
• f(XIN)/4096 interrupt
• Multi-master I2C-BUS interface interrupt
• Data slicer interrupt
• A-D conversion interrupt
XIN
XCOUT XIN
Open
External oscillation
circuit or external
pulse
Vcc
Vss
XOUT
Open
External oscillation
circuit
Vcc
Vss
Fig.8.14.2 External Clock Input Circuit Example
Rev. 1.0
93
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
XCIN
XCOUT
OSC1 clock selection
bits (See notes 1, 4)
XIN
Timer 3 count
stop bit (See notes 1, 2)
XOUT
“1”
“1”
1 /8
1 /2
Timer 4 count
stop bit (See notes 1, 2)
Timer 3
Timer 4
“0”
“0”
Internal system clock
selection bit (See notes 1, 3)
Timer 3
count source selection bit (See notes 1, 2)
Timing φ
(Internal clock)
Main clock (XIN–XOUT) stop bit (See notes 1, 3)
Internal system clock selection bit
(See notes 1, 3)
Q
S
R
S
STP instruction
WIT
instruction
Q
Q
R
S
R
Reset
STP instruction
Reset
Interrupt disable flag I
Interrupt request
Notes 1 : The value at reset is “0.”
2 : Refer to timer mode register 2.
3 : Refer to the CPU mode register.
4 : Refer to the OSD control register.
Fig.8.14.3 Clock Generating Circuit Block Diagram
Rev. 1.0
94
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
High-speed operation start
mode
Reset
STP instruction
WIT instruction
8 MHz oscillating
32 kHz oscillating
φ is stopped (“H”)
Timer operating
8 MHz oscillating
32 kHz oscillating
f(φ) = 4 MHz
Interrupt
8 MHz stopped
32 kHz stopped
φ is stopped (“H”)
Interrupt (See note 1)
External INT,
timer interrupt,
or SI/O interrupt
External INT
CM7 = 0
CM7 = 1
WIT instruction
8 MHz oscillating
32 kHz oscillating
φ is stopped (“H”)
Timer operating
(See note 3)
STP instruction
8 MHz oscillating
32 kHz oscillating
f(φ) = 16kHz
Interrupt
8 MHz stopped
32 kHz stopped
φ is stopped (“H”)
Interrupt (See note 2)
CM6 = 0
CM6 = 1
8 MHz stopped
32 kHz oscillating
φ is stopped (“H”)
Timer operating
(See note 3)
The program must
allow time for 8 MHz
oscillation to stabilize
STP instruction
WIT instruction
8 MHz stopped
32 kHz stopped
φ = stopped (“H”)
8 MHz stopped
32 kHz oscillating
f(φ) = 16 kHz
Interrupt
Interrupt (See note 2)
CPU mode register
(Address : 00FB16)
CM6 : Main clock (XIN–XOUT) stop bit
0 : Oscillating
1 : Stopped
CM7 : Internal system clock selection bit
0 : XIN-XOUT selected (high-speed mode)
1 : XCIN-XCOUT selected (low-speed mode)
The example assumes that 8 MHz is being applied to the XIN pin and 32 kHz to the XCIN pin. The φ indicates the internal clock.
Notes 1: When the STP state is ended, a delay of approximately 8 ms is automatically generated by timer 3 and timer 4.
2: The delay after the STP state ends is approximately 2s.
3: When the internal clock φ divided by 8 is used as the timer count source, the frequency of the count source is 2 kHz.
Fig.8.14.4 State Transitions of System Clock
Rev. 1.0
95
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.15 DISPLAY OSCILLATION CIRCUIT
8.17 ADDRESSING MODE
The OSD oscillation circuit has a built-in clock oscillation circuits, so
that a clock for OSD can be obtained simply by connecting an LC, a
ceramic resonator, or a quartz-crystal oscillator across the pins OSC1
and OSC2. Which of the sub-clock or the OSD oscillation circuit is
selected by setting bits 5 and 6 of the OSD control register (address
00D016).
The memory access is reinforced with 17 kinds of addressing modes.
Refer to SERIES 740 <Software> User’s Manual for details.
8.18 MACHINE INSTRUCTIONS
There are 71 machine instructions. Refer to SERIES 740 <Soft- ware>
User’s Manual for details.
9. PROGRAMMING NOTES
OSC1
• The divide ratio of the timer is 1/(n+1).
• Even though the BBC and BBS instructions are executed immediately after the interrupt request bits are modified (by the program), those instructions are only valid for the contents before
the modification. At least one instruction cycle is needed (such as
an NOP) between the modification of the interrupt request bits
and the execution of the BBC and BBS instructions.
• After the ADC and SBC instructions are executed (in the decimal
mode), one instruction cycle (such as an NOP) is needed before
the SEC, CLC, or CLD instruction is executed.
• An NOP instruction is needed immediately after the execution of
a PLP instruction.
• In order to avoid noise and latch-up, connect a bypass capacitor
(≈ 0.1µF) directly between the VCC pin–VSS pin, AVCC pin–VSS
pin, and the VCC pin–CNVSS pin, using a thick wire.
OSC2
L
C1
C2
Fig.8.15.1 Display Oscillation Circuit
8.16 AUTO-CLEAR CIRCUIT
When a power source is supplied, the auto-clear function will operate by connecting the following circuit to the RESET pin.
Circuit example 1
Vcc
RESET
Vss
Circuit example 2
RESET
Vcc
Vss
Note : Make the level change from “L” to “H” at the point at
which the power source voltage exceeds the specified
voltage.
Fig.8.16.1 Auto-clear Circuit Example
Rev. 1.0
96
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
10. ABSOLUTE MAXIMUM RATINGS
Symbol
VCC, AVCC
VI
VI
VO
VO
IOH
IOL1
IOL2
IOL3
IOL4
Pd
Topr
Tstg
Parametear
Power source voltage VCC, AVCC
Input voltage
CNVSS
Input voltage
P00–P07, P10–P17,______
P20–P27, P30,
P31, P50, P51, XIN, RESET, CVIN
Output voltage P06, P07, P10–P17, P20–P27,
P30, P31, P52–P57, P60–P67, XOUT
Output voltage P00–P05
Circuit current P10–P17, P20–P27, P30, P31
P52–P57, P60–P67
Circuit current P06, P07, P10, P15–P17, P20–P23,
P26, P27, P52–P57, P60–P67
Circuit current P11–P14
Circuit current P00–P05
Circuit current P24, P25, P30, P31
Power dissipation
Operating temperature
Storage temperature
Conditions
Ratings
–0.3 to 6
–0.3 to 6
Unit
V
V
–0.3–VCC + 0.3
V
–0.3–VCC + 0.3
V
–0.3 to 13
V
0 to 1 (See note 1)
mA
0 to 2 (See note 2)
mA
0 to 6 (See note 2)
0 to 1 (See note 2)
0 to 10 (See note 3)
550
–10 to 70
–40 to 125
mA
mA
mA
mW
All voltages are based
on VSS.
Output transistors are
cut off.
Ta = 25 °C
°C
°C
11. RECOMMENDED OPERATING CONDITIONS (Ta = –10 °C to 70 °C, VCC = 5 V ± 10 %, unless otherwise noted)
Symbol
VCC, AVCC
VSS
VIH1
VIH2
VIL1
VIL2
VIL3
IOH
IOL1
IOL2
IOL3
IOL4
f(XIN)
f(XCIN)
fOSC
fhs1
fhs2
fhs3
fhs4
VI
Parametear
Power source voltage (See note 4)
Power source voltage
HIGH Input voltage
P00–P07, P10–P17, P20–P27, P30, P31, P50, P51,
______
RESET, XIN
HIGH Input voltage
SCL1, SCL2, SDA1, SDA2 (When using I2C-BUS)
LOW Input voltage
P00–P07, P10–P17, P20–P27, P30, P31
LOW Input voltage
SCL1, SCL2, SDA1, SDA2 (When using I2C-BUS)
______
LOW Input voltage (See note 6)
P50, P51, RESET, XIN, OSC1, TIM2,
TIM3, INT1, INT2, INT3, SIN, SCLK
HIGH average output current (See note1) P10–P17, P20–P27, P30, P31,
P52–P57, P60–P67
LOW average output current (See note 2) P06, P07, P10, P15–P17, P20–P23,
P26, P27, P52–P57, P60–P67
LOW average output current (See note 2) P11–P14
LOW average output current (See note 2) P00–P05
LOW average output current (See note 3) P24, P25, P30, P31
Oscillation frequency (for CPU operation) (See note 5) XIN
Oscillation frequency (for sub-clock operation)
XCIN
Oscillation frequency (for OSD)
OSC1
Input frequency
TIM2, TIM3, INT1, INT2, INT3
Input frequency
SCLK
Input frequency
SCL1, SCL2
Input frequency
Horizontal sync. signal of video signal
Input amplitude video signal
CVIN
Min.
4.5
0
Limits
Typ.
5.0
0
Max.
5.5
0
Unit
V
V
0.8 VCC
VCC
V
0.7 VCC
0
0
VCC
0.4 VCC
0.3 VCC
V
V
V
0
0.2 VCC
V
7.9
29
26.5
8.0
32
27.0
15.262
1.5
15.734
2.0
1
mA
2
mA
6
1
10
8.1
35
27.0
100
1
400
16.206
2.5
mA
mA
mA
MHz
kHz
MHz
kHz
MHz
kHz
kHz
V
Rev. 1.0
97
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
12. ELECTRIC CHARACTERISTICS (VCC = 5 V ± 10 %, VSS = 0 V, f(XIN) = 8 MHz, Ta = –10 °C to 70 °C, unless otherwise noted)
Symbol
Parametear
Test conditions
VCC = 5.5V,
f(XIN) = 8MHz
System operation
ICC
Power source current
Wait mode
Stop mode
VOH
HIGH output voltage
VOL
LOW output voltage
VT+ –VT–
IIZH
IIZL
IOZH
RBS
LOW output voltage
P10–P17, P20–P27,
P30, P31, P52–P57, P60–P67
P00–P07, P10,
P15–P17, P20–P23,
P26, P27, P52–P57, P60–P67
P24, P25, P30, P31
LOW output voltage
P11–P14
Hysteresis
(See note 6)
____________
RESET, P50, P51, INT1, INT2,
INT3, TIM2, TIM3, SIN, SCLK, SCL1,
SCL2, SDA1, SDA2
HIGH input leak current
P06, P07, ____________
P10–P17, P20–P27,
P30, P31, RESET, P50, P51,
HIGH input leak current
P00–P07, P10–P1
7, P20–P27, P30,
____________
P31, P50, P51, RESET
HIGH output leak current
P00–P05
I2C-BUS • BUS switch connection resistor
(between SCL1 and SCL2, SDA1 and SDA2)
Min.
OSD OFF
Data slicer OFF
OSD ON
Data slicer ON
VCC = 5.5V, f(XIN) = 0,
f(XCIN) = 32kHz,
OSD OFF, Data slicer OFF,
Low-power dissipation mode set
(CM5 = “0”, CM6 = “1”)
VCC = 5.5 V, f(XIN) = 8 MHz
VCC = 5.5 V, f(XIN) = 0,
f(XCIN) = 32 kHz,
Low-power dissipation mode set
(CM5 = “0”, CM6 = “1”)
VCC = 5.5V, f(XIN) = 0,
f(XCIN) = 0
VCC = 4.5 V
IOH = –0.5 mA
VCC = 4.5 V
IOL = 0.5 mA
Limits
Typ.
Max.
15
30
30
45
60
200
Unit
Test
circuit
mA
µA
1
2
25
4
100
1
10
2.4
mA
µA
V
2
V
2
0.4
0.6
1.3
V
3
VCC = 5.5 V
VI = 5.5 V
5
µA
4
VCC = 5.5 V
VI = 0 V
5
µA
4
VCC = 5.5 V
VI = 12 V
VCC = 4.5 V
10
µA
5
130
Ω
6
0.4
VCC = 4.5 V
IOL = 10.0 mA
VCC = 4.5 V
VCC = 5.0 V
3.0
IOL = 3 mA
IOL = 6 mA
0.5
Notes 1: The total current that flows out of the IC must be 20 mA or less.
2: The total input current to IC (IOL1 + IOL2 + IOL3) must be 30 mA or less.
3: The total average input current for ports P30, P31, P24 and P25 and AVCC–VSS to IC must be 20 mA or less.
4: Connect 0.1 µF or more capacitor externally between the power source pins VCC–VSS and AVCC–VSS so as to reduce power source noise.
Also connect 0.1 µF or more capacitor externally between the pins VCC–CNVSS.
5: Use a quartz-crystal oscillator or a ceramic resonator for the CPU oscillation circuit. When using the data slicer, use 8 MHz.
6: P06, P07, P15, P23, P24 have the hysteresis when these pins are used as interrupt input pins or timer input pins. P1 1–P14 have the hysteresis when these
pins are used as multi-master I2C-BUS interface ports. P20–P22 have the hysteresis when these pins are used as serial I/O pins.
7: Pin names in each parameter is described as below.
(1) Dedicated pins: dedicated pin names.
(2) Duble-/triple-function ports
• When the same limits: I/O port name.
• When the limits of functins except ports are different from I/O port limits: function pin name.
Rev. 1.0
98
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
+ Power source voltage
1
2
4.5 V
A
I cc
XIN
Vcc
V cc
8.00 MHz
OSC1
XOUT
Each output pin
OSC2
VOH
Vss
V
Vss
Pin VCC is made the operation state and is
measured the current, with a ceramic
resonator.
3
IOH
or
or
VO L
IOL
After setting each output pin to HIGH level when measuring VOH
and to LOW level when measuring VOL, each pin is measured.
5.0 V
4
5.5 V
Vcc
Vcc
IIZH
or
IIZL
Each input pin
Each input pin
A
Vss
Vss
5.5 V
5
6
4.5V
12 V
Vcc
Vcc
IOZH
Each output pin
IBS
SCL1 or SDA1
A
A
RB S
SCL2 or SDA2
VBS
Vss
Vss
After setting each output pin OFF state, each
pin is measured
RBS = VBS/IBS
Fig.12.1 Measure Circuits
Rev. 1.0
99
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
13. A-D CONVERTER CHARACTERISTICS
(VCC = 5 V ± 10 %, VSS = 0 V, f(XIN) = 8 MHz, Ta = –10 °C to 70 °C, unless otherwise noted)
Symbol
Parameter
Test conditions
Resolution
Non-linearity error
Differencial non-linearity error
Zero transition error
Full-scale transition error
—
—
—
V0T
VFST
Min.
Limits
Typ.
Max.
6
±1
±0.9
2
–2
IOL (SUM) = 0 mA
Unit
bits
LSB
LSB
LSB
LSB
14. MULTI-MASTER I2C-BUS BUS LINE CHARACTERISTICS
Symbol
tBUF
Standard clock mode High-speed clock mode
Unit
Min.
Max.
Min.
Max.
4.7
1.3
µs
4.0
0.6
µs
4.7
1.3
µs
1000
20+0.1Cb
300
ns
0
0
0.9
µs
4.0
0.6
µs
300
20+0.1Cb
300
ns
250
100
ns
4.7
0.6
µs
4.0
0.6
µs
Parameter
Bus free time
Hold time for START condition
LOW period of SCL clock
Rising time of both SCL and SDA signals
Data hold time
HIGH period of SCL clock
Falling time of both SCL and SDA signals
Data set-up time
Set-up time for repeated START condition
Set-up time for STOP condition
tHD; STA
tLOW
tR
tHD; DAT
tHIGH
tF
tSU; DAT
tSU; STA
tSU; STO
Note: Cb = total capacitance of 1 bus line
SDA
tHD;STA
tBUF
tLOW
P
tR
tSU;STO
tF
Sr
S
P
SCL
tHD;STA
tHD;DAT
tHIGH
tSU;DAT
tSU;STA
S : Start condition
Sr : Restart condition
P : Stop condition
Fig.14.1 Definition Diagram of Timing on Multi-master I2C-BUS
Rev. 1.0
100
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
15. PROM PROGRAMMING METHOD
The built-in PROM of the One Time PROM version (blank) and the
built-in EPROM version can be read or programmed with a generalpurpose PROM programmer using a special programming adapter.
Product
M37273E8SP
M37273EFSP
Name of Programming Adapter
PCA7426G02
PCA7426G02
The PROM of the One Time PROM version (blank) is not tested or
screened in the assembly process nor any following processes. To
ensure proper operation after programming, the procedure shown in
Figure 15.1 is recommended to verify programming.
Programming with
PROM programmer
Screening (Caution)
(150°C for 40 hours)
Verification with
PROM programmer
Functional check in target device
Caution : The screening temperature is far higher
than the storage temperature. Never
expose to 150°C exceeding 100 hours.
Fig. 15.1 Programming and Testing of One Time PROM Version
Rev. 1.0
101
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
16. DATA REQUIRED FOR MASK ORDERS
The following are necessary when ordering a mask ROM production:
• Mask ROM Order Confirmation Form
• Mark Specification Form
• Data to be written to ROM, in EPROM form (three identical copies)
or FDK
When using EPROM:
<M37273M8-XXXSP, M37273E8SP>
28-pin DIP Type 27512
<M37273MF-XXXSP, M37273EFSP>
32-pin DIP Type 27C101
Rev. 1.0
102
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
17. MASK CONFIRMATION FORM
Mask ROM number
GZZ–SH55–39B < 91A0 >
740 FAMILY MASK ROM CONFIRMATION FORM
SINGLE-CHIP MICROCOMPUTER M37273M8-XXXSP
MITSUBISHI ELECTRIC
Receipt
Date:
Section head Supervisor
signature
signature
Note : Please fill in all items marked ✽.
Customer
Date
issued
Date :
Submitted by Supervisor
)
Issuance
signature
✽
TEL
(
Company
name
✽1. Confirmation
Three EPROMs are required for each pattern if this order is performed by EPROMs.
One floppy disk is required for each pattern if this order is performed by a floppy disk.
Ordering by EPROMs
If at least two of the three sets of EPROMs submitted contain identical data, we will produce masks based on this data.
We shall assume the responsibility for errors only if the mask ROM data on the products we produce differs from this
data. Thus, extreme care must be taken to verify the data in the submitted EPROMs.
Checksum code for entire EPROM
(hexadecimal notation)
EPROM type (indicate the type used)
27512
EPROM address
000016 Product nameASCII code:
'M37273M8-'
000F1612345678901234567
12345678901234567
12345678901234567
140016
OSDROM
3BFF1612345678901234567
12345678901234567
12345678901234567
12345678901234567
800016
Data ROM
(32K)
FFFF16
(1)
Set “FF16” in the shaded area.
1/3
Rev. 1.0
103
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
GZZ–SH55–39B < 91A0 >
740 FAMILY MASK ROM CONFIRMATION FORM
SINGLE-CHIP MICROCOMPUTER M37273M8-XXXSP
MITSUBISHI ELECTRIC
(2)
Write the ASCII codes that indicate the product name of “M37273M8–” to addresses 000016 to 000F16.
Addresses 000016 to 000F16 store the product name.
Address
ASCII codes ‘M37273M8-’ are listed on the right.
The addresses and data are in hexadecimal notation.
Note: If the name of the product contained in the EPROMs does
not match the name on the mask ROM confirmation form,
the ROM processing is disabled. Please make sure the
data is written correctly.
Address
000016
000116
‘M’ = 4D16
‘3’ = 3316
000816
000916
‘–’ = 2D16
FF16
000216
000316
‘7’ = 3716
‘2’ = 3216
000A16
000B16
FF16
FF16
000416
000516
‘7’ = 3716
‘3’ = 3316
000C16
000D16
FF16
FF16
000616
000716
‘M’ = 4D16
‘8’ = 3816
000E16
000F16
FF16
FF16
Ordering by floppy disk
We will produce masks based on the mask files generated by the mask file generating utility. We shall assume the
responsibility for errors only if the mask ROM data on the products we produce differs from this mask file. Thus, extreme
care must be taken to verify the mask file in the submitted floppy disk.
The submitted floppy disk must be 3.5-inch 2HD type and DOS/V format. And the number of the mask files must be 1 in
one floppy disk.
File code
(hexadecimal notation)
Mask file name
.MSK (equal or less than eight characters)
✽2. Mark specification
Mark specification must be submitted using the correct form for the type of package being ordered. Fill the appropriate
mark specification form (52P4B for M37273M8-XXXSP) and attach to the mask ROM confirmation form.
✽3. Comments
2/3
Rev. 1.0
104
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
GZZ–SH55–39B < 91A0 >
740 FAMILY MASK ROM CONFIRMATION FORM
SINGLE-CHIP MICROCOMPUTER M37273M8-XXXSP
MITSUBISHI ELECTRIC
Font data must be stored in the proper OSD ROM address according to the following table.
OSD ROM address of character font data
AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
OSD ROM address bit
Line number / Character code /
Font bit
0
0
Line number
Character code
Font
bit
Line number = 0A 16 to 1D 16
Character code = 00 16 to FF 16 (Do not set 7F 16 and 80 16.)
Font bit = 0 :Left font
1 :Right font
Example)The font data “60” (shaded area
) of the character code “AA
0 0 1 0 0 1 0 1 0 1 0 1 0 1 0 0
2
16”
is stored in address
=2554 16.
Left font
Right font
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Line number 0A16
0B16
0C16
0D16
0E16
0F16
1016
1116
1216
1316
1416
1516
1616
1716
1816
1916
1A16
1B16
1C16
1D16
Character code “AA 16”
Notes 1: The 80-byte addresses corresponding to the character code “7F 16” and “80 16” in OSD ROM are the test
data storning area. Set “FF 16” to the area (We stores the test data to this area and the different data
from “FF 16” is stored for the actual products.)
The test data storing area :
addresses 1000 16 + (4 + 2n) ✕ 10016 + FE 16 to 1000 16 + (5 + 2n) ✕ 10016 + 0116 (n = 0 to 19)
addresses 14FE 16 to 1501 16
addresses 16FE 16 to 1701 16
•
•
•
addresses 38FE 16 to 3901 16
addresses 3AFE 16 to 3B01 16
2 : The character code “09 16” is used for “transparent space” when displaying Closed Caption.
Therefore, set “00 16” to the 40-byte addresses corresponding to the character code “09 16.”
The transparent space font data storing area :
addresses 1000 16 + (4 + 2n) ✕ 10016 + 12 16 to 1000 16 + (4 + 2n) ✕ 10016 + 1316 (n = 0 to 19)
addresses 1412 16 and 1413 16
addresses 1612 16 and 1613 16
•
•
•
addresses 3812 16 and 3813 16
addresses 3A12 16 and 3A13 16
3/3
Rev. 1.0
105
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
GZZ–SH55–40B < 91A0 >
Mask ROM number
740 FAMILY MASK ROM CONFIRMATION FORM
SINGLE-CHIP MICROCOMPUTER M37273MF-XXXSP
MITSUBISHI ELECTRIC
Receipt
Date:
Section head Supervisor
signature
signature
Note : Please fill in all items marked ✽.
(
Customer
Date
issued
Date :
)
Issuance
signature
✽
Submitted by Supervisor
TEL
Company
name
✽1. Confirmation
Three EPROMs are required for each pattern if this order is performed by EPROMs.
One floppy disk is required for each pattern if this order is performed by a floppy disk.
Ordering by EPROMs
If at least two of the three sets of EPROMs submitted contain identical data, we will produce masks based on this data.
We shall assume the responsibility for errors only if the mask ROM data on the products we produce differs from this
data. Thus, extreme care must be taken to verify the data in the submitted EPROMs.
Checksum code for entire EPROM
(hexadecimal notation)
EPROM type (indicate the type used)
27C101
EPROM address
000016 Product nameASCII code:
'M37273MF-'
000F161234567890123456
1234567890123456
1234567890123456
100016
Data ROM
FFFF161234567890123456
1234567890123456
(60K)
1234567890123456
1140016
OSDROM
13BFF161234567890123456
1234567890123456
1234567890123456
1FFFF161234567890123456
(1)
Set “FF16” in the shaded area.
1/3
Rev. 1.0
106
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
GZZ–SH55–40B < 91A0 >
740 FAMILY MASK ROM CONFIRMATION FORM
SINGLE-CHIP MICROCOMPUTER M37273MF-XXXSP
MITSUBISHI ELECTRIC
(2)
Write the ASCII codes that indicate the product name of “M37273MF–” to addresses 000016 to 000F16.
Addresses 000016 to 000F16 store the product name.
ASCII codes ‘M37273MF-’ are listed on the right.
The addresses and data are in hexadecimal notation.
Address
000016
000116
000216
Note: If the name of the product contained in the EPROMs does
not match the name on the mask ROM confirmation form,
the ROM processing is disabled. Please make sure the
data is written correctly.
‘M’ = 4D16
Address
000816
‘–’ = 2D16
‘3’ = 3316
‘7’ = 3716
000916
000A16
FF16
FF16
000316
000416
‘2’ = 3216
‘7’ = 3716
000B16
000C16
FF16
FF16
000516
000616
‘3’ = 3316
‘M’ = 4D16
000D16
000E16
FF16
FF16
000716
‘F’ = 4616
000F16
FF16
Ordering by floppy disk
We will produce masks based on the mask files generated by the mask file generating utility. We shall assume the
responsibility for errors only if the mask ROM data on the products we produce differs from this mask file. Thus, extreme
care must be taken to verify the mask file in the submitted floppy disk.
The submitted floppy disk must be 3.5-inch 2HD type and DOS/V format. And the number of the mask files must be 1 in
one floppy disk.
File code
(hexadecimal notation)
Mask file name
.MSK (equal or less than eight characters)
✽2. Mark specification
Mark specification must be submitted using the correct form for the type of package being ordered. Fill the appropriate
mark specification form (52P4B for M37273MF-XXXSP) and attach to the mask ROM confirmation form.
✽3. Comments
2/3
Rev. 1.0
107
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
GZZ–SH55–40B < 91A0 >
740 FAMILY MASK ROM CONFIRMATION FORM
SINGLE-CHIP MICROCOMPUTER M37273MF-XXXSP
MITSUBISHI ELECTRIC
Font data must be stored in the proper OSD ROM address according to the following table.
OSD ROM address of character font data
OSD ROM address bit
AD16AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
Line number /
Character code / Font bit
1
0
Line number
0
Character code
Font
bit
Line number = 0A 16 to 1D16
Character code = 00 16 to FF 16 (Do not set 7F 16 and 80 16.)
Font bit = 0 :Left font
1 :Right font
Example)The font data “60” (shaded area
) of the character code “AA
1 001 0 0 1 0 1 0 1 0 1 0 1 0 0
2
16”
is stored in address
=12554 16.
Left font
Right font
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Line number 0A16
0B16
0C16
0D16
0E16
0F16
1016
1116
1216
1316
1416
1516
1616
1716
1816
1916
1A16
1B16
1C16
1D16
Character code “AA 16”
Notes 1: The 80-byte addresses corresponding to the character code “7F 16” and “80 16” in OSD ROM are the test
data storning area. Set “FF 16” to the area (We stores the test data to this area and the different data
from “FF 16” is stored for the actual products.)
The test data storing area :
addresses 11000 16+(4+2n)✕10016+FE16 to11000 16+(5+2n)✕100 16+0116(n=0 to 19)
addresses 114FE 16 to 11501 16
addresses 116FE 16 to 11701 16
•
•
•
addresses 138FE 16 to 13901 16
addresses 13AFE 16 to 13B01 16
2 : The character code “09 16” is used for “transparent space” when displaying Closed Caption.
Therefore, set “00 16” to the 40-byte addresses corresponding to the character code “09 16.”
The transparent space font data storing area :
addresses 11000 16+(4+2n)✕10016+1216 to 11000 16+(4+2n)✕100 16+1316 (n=0 to 19)
addresses 11412 16 and 11413 16
addresses 11612 16 and 11613 16
•
•
•
addresses 13812 16 and 13813 16
addresses 13A12 16 and 13A13 16
3/3
Rev. 1.0
108
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
18. MARK SPECIFICATION FORM
Rev. 1.0
109
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
19. ONE TIME PROM VERSION M37273E8SP, M37273EFSP MARKING
M37273E8SP
M37273EFSP
XXXXXXX
XXXXXXX is mitsubishi lot number
Rev. 1.0
110
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
20. APPENDIX
Pin Configuration (TOP VIEW)
P50/HSYNC
1
52
P52/R
P51/VSYNC
2
51
P53/G
3
50
4
49
P54/B
P55/OUT1
P56
P02/PWM2
5
48
P63
6
47
P57
7
P03/PWM3
P60
8
45
P20/SCLK
P64
P21/SOUT
44
P65
P04/PWM4
10
43
P05/PWM5
P06/INT2/AD4
11
P22/SIN
P66
P61
P07/INT1
13
P62
15
P23/TIM3
P24/TIM2
P25
AVCC
16
HLF
VHOLD
20
21
32
9
12
14
17
18
19
M37273M8-XXXSP,M37273MF-XXXSP
M37273E8SP,M37273EFSP
P00/PWM0
P01/PWM1
46
42
41
40
P10/OUT2
P67
39
P11/SCL1
38
P12/SCL2
P13/SDA1
P14/SDA2
37
36
35
34
33
P15/AD1/INT3
P16/AD2
P17/AD3
P30/AD5
P31/AD6
CVIN
22
31
CNVSS
XIN
XOUT
23
30
24
29
25
28
RESET
P26/OSC1/XCIN
P27/OSC2/XCOUT
VSS
26
27
VCC
Outline 52P4B
Rev. 1.0
111
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Memory Map
¡M37273M8-XXXSP, M37273E8SP
000016
RAM
(1152 bytes)
00BF16
00C016
00FF16
010016
01FF16
020016
020F16
10000 16
Zero page
SFR1 area
SFR2 area
Not used
030016
032016
ROM correction function
Vector1: address 0300 16
Vector2: address 0320 16
05BF16
Not used
OSD RAM
(128 bytes)
iSee note j
Not used
080016
087F16
Not used
OSD ROM
(10K bytes)
140016
3BFF16
Not used
800016
ROM
(32K bytes)
FF0016
FFDE16
FFFF16
Interrupt vector area
Special page
1FFFF 16
Note: Refer to Table 8.11.3 OSD RAM.
Rev. 1.0
112
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
¡M37273MF-XXXSP, M37273EFSP
000016
RAM
(1472 bytes)
00BF 16
00C0 16
00FF16
010016
01FF16
020016
1000016
Zero page
SFR1 area
SFR2 area
020F16
Not used
Not used
030016
032016
ROM correction function
Vector 1: address 0300 16
Vector 2: address 0320 16
06FF16
Not used
OSD RAM
(128 bytes)
iSee note j
080016
087F16
Not used
OSD ROM
(10K bytes)
100016
11400 16
13BFF16
ROM
(60K bytes)
Not used
FF0016
FFDE16
FFFF16
Interrupt vector area
Special page
1FFFF 16
Note: Refer to Table 8.11.3 OSD RAM.
Rev. 1.0
113
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Memory Map of Special Function Register
(SFR)
■ SFR1 Area (addresses C016 to DF16)
<Bit allocation>
<State immediately after reset>
:
Name
0 : “0” immediately after reset
Function bit
:
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix this bit to “0”
(do not write “1”)
1 : Fix this bit to “1”
(do not write “0”)
Address
C016
C116
C216
C316
C416
C516
C616
C716
C816
C916
CA16
CB16
CC16
CD16
CE16
CF16
D016
D116
D216
D316
D416
D516
D616
D716
D816
D916
DA16
DB16
DC16
DD16
DE16
DF16
Register
Bit allocation
b7
State immediately after reset
b0 b7
Port P0 (P0)
Port P0 direction register (D0)
Port P1 (P1)
Port P1 direction register (D1)
Port P2 (P2)
Port P2 direction register (D2)
P31 P30
Port P3 (P3)
T3SC
Port P3 direction register (D3)
0
P31CP30C P31D P30D
Port P5 (P5)
OSD port control register (PF)
Port P6 (P6)
PF7
PF5 PF4 PF3 PF2
0
0
Caption data register 3 (CD3)
CDL27 CDL26 CDL25 CDL24 CDL23CDL22 CDL21 CDL20
Caption data register 4 (CD4)
CDH27CDH26CDH25CDH24CDH23CDH22CDH21CDH20
OSD control register (OC)
0
OC6 OC5 OC4 OC3 OC2 OC1 OC0
HP 6 HP 5 HP 4 HP 3 HP 2 HP 1 HP 0
Horizontal position register (HP)
Block control register 1 (BC1)
BC17 BC16 BC15 BC14 BC13BC12 BC11 BC10
Block control register 2 (BC2)
BC27 BC26 BC25 BC24 BC23BC22 BC21 BC20
Vertical position register 1 (VP1)
VP17 VP16 VP15 VP14 VP13 VP12 VP11 VP10
Vertical position register 2 (VP2)
VP27 VP26 VP25 VP24 VP23 VP22 VP21 VP20
Window register 1 (WN1)
WN17 WN16 WN15 WN14 WN13WN12 WN11 WN10
Window register 2 (WN2)
WN27 WN26 WN25 WN24 WN23WN22 WN21 WN20
I/O polarity control register (PC)
Raster color register (RC)
Interrupt input polarity control register (RE)
0
RC7
P C6 P C5 P C4 P C3 P C2 P C1 P C0
0
0
RC4 RC3 RC2 RC1 RC0
INT3 INT2 INT1
0016
0016
0016 (See note 1)
0
0
b0
?
0016
?
0016
?
0016
0 0 0 ? ?
0016
?
?
?
0016
0016
?
?
?
0016
0016
?
?
?
?
?
?
4016
0016
?
?
0016
0016
0016
0016 (See note 2)
Notes 1: This is only M37273MF-XXXSP and M37273E8SP.
2: As for M37273M8-XXXSP and M37273E8SP, the reset value is ? (indeterminate).
Rev. 1.0
114
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
■ SFR1 Area (addresses E016 to FF16)
<Bit allocation>
<State immediately after reset>
:
Name
:
0 : “0” immediately after reset
Function bit
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix this bit to “0”
(do not write “1”)
1 : Fix this bit to “1”
(do not write “0”)
Address
E016
E116
E216
E316
E416
E516
E616
E716
E816
E916
EA16
EB16
EC16
ED16
EE16
EF16
F016
F116
F216
F316
F416
F516
F616
F716
F816
F916
FA16
FB16
FC16
FD16
FE16
FF16
Register
Data slicer control register 1 (DSC1)
Bit allocation
b7
0
Data slicer control register 2 (DSC2)
1
0
1
0
0
State immediately after reset
b0 b7
DSC12DSC11DSC10
1
DSC25 DSC24 DSC23
DSC20
Caption data register 1 (CD1)
CDL17 CDL16 CDL15 CDL14 CDL13 CDL12 CDL11 CDL10
Caption data register 2 (CD2)
CDH17CDH16CDH15CDH14CDH13CDH12CDH11CDH10
Clock run-in detect register (CRD)
Data clock position register (DPS)
CRD7 CRD6 CRD5 CRD4 CRD3
Caption position register (CPS)
CPS7 CPS6 CPS5 CPS4 CPS3 CPS2 CPS1 CPS0
DPS7 DPS6 DPS5 DPS4 DPS3
0
1
?
0
?
0
0
?
0
0
0
0
0
0
0
Data slicer test register 2
Data slicer test register 1
Synchronous signal counter register (HC)
Serial I/O register (SIO)
Serial I/O mode register (SM)
0
HC5 HC4 HC3 HC2 HC1 HC0
SM6 SM5
A-D control register 1 (AD1)
0
SM3 SM2 SM1 SM0
ADC14
A-D control register 2 (AD2)
ADC12 ADC11 ADC10
ADC25 ADC24 ADC23 ADC22ADC21 ADC20
Timer 5 (T5)
Timer 6 (T6)
Timer 1 (T1)
Timer 2 (T2)
Timer 3 (T3)
Timer 4 (T4)
Timer mode register 1 (TM1)
TM17 TM16 TM15 TM14 TM13 TM12 TM11 TM10
Timer mode register 2 (TM2)
TM27 TM26 TM25 TM24 TM23 TM22 TM21 TM20
I2C data shift register (S0)
I2C address register (S0D)
I2C status register (S1)
I2C control register (S1D)
D7
D6
D5
D4
D3
D2
D1
D0
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW
MST TRX BB
PIN
AL AAS AD0 LRB
BSEL1 BSEL0 10BIT ALS ESO BC2 BC1 BC0
SAD
ACK ACK FAST CCR4 CCR3 CCR2 CCR1 CCR0
BIT MODE
I2C clock control register (S2)
CM7 CM6 CM5 1
1 CM2 0 0
CPU mode register (CPUM)
V
S
C
R
O
S
D
R
T
M
4R TM3R TM2R TM1R
I
N
3
R
Interrupt request register 1 (IREQ1)
Interrupt request register 2 (IREQ2)
Interrupt control register 1 (ICON1)
Interrupt control register 2 (ICON2)
0
TM56RIICR IN
C2KR0 CKR S1R DSR IN1R
IN3E VSCEOSDE TM4E TM3E TM2E TM1E
TM56CTM56E
IICE IN2E CKE S1E DSE IN1E
0016
0 ?
0016
0016
0016
0916
0 0
0016
0016
0016
?
0016
? 0
0016
0716
FF16
FF16
0716
FF16
0716
0016
0016
?
0016
1 0
0016
0016
3C16
0016
0016
0016
0016
b0
?
0
?
0
0
0
0
0
0
0
0
?
Rev. 1.0
115
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
■ SFR2 Area (addresses 20016 to 20F16)
<Bit allocation>
<State immediately after reset>
:
Name
:
0 : “0” immediately after reset
Function bit
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix this bit to “0”
(do not write “1”)
1 : Fix this bit to “1”
(do not write “0”)
Address
20016
20116
20216
20316
20416
20516
20616
20716
20816
20916
20A16
20B16
20C16
20D16
20E16
20F16
Register
Bit allocation
b7
State immediately after reset
b0 b7
PWM0 register (PWM0)
PWM1 register (PWM1)
PWM2 register (PWM2)
PWM3 register (PWM3)
PWM4 register (PWM4)
PWM5 register (PWM5)
0016
0016
PWM mode register 1 (PM1)
PWM mode register 2 (PM2)
ROM correction address 1 (high-order)
PM13
0
0
PM10
PM25 PM24 PM23 PM22 PM21 PM20
ROM correction address 1 (low-order)
ROM correction address 2 (high-order)
ROM correction address 2 (low-order)
ROM correction enable register (RCR)
b0
?
?
?
?
?
?
?
?
RC1 RC0
?
?
?
? 0
0016
0016
0016
0016
0016
0016
?
?
?
0
Rev. 1.0
116
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Internal State of Processor Status Register and
Program Counter at Reset
<State immediately after reset>
<Bit allocation>
:
Name
0 : “0” immediately after reset
Function bit
:
1 : “1” immediately after reset
: No function bit
? : Indeterminate immediately
after reset
0 : Fix to this bit to “0”
(do not write to “1”)
1 : Fix to this bit to “1”
(do not write to “0”)
Register
Bit allocation
State immediately after reset
b0 b7
b7
Processor status register (PS)
Program counter (PCH)
Program counter (PCL)
N
V
T
B
D
I
Z
C
b0
? ? ? ? ? 1 ? ?
Contents of address FFFF16
Contents of address FFFE16
Rev. 1.0
117
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Structure of Register
The figure of each register structure describes its functions, contents
at reset, and attributes as follows:
<Example>
Bit position
Bit attributes(Note 2)
Values immediately after reset release (Note 1)
CPU Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
1 1
CPU mode register (CPUM) (CM) [Address 00FB16]
B
Name
P
r
o
c
e
s
s
or mode bits
0, 1
(CM0, CM1)
2
Stack page selection
bit (See note) (CM2)
Functions
b1 b0
0
0
1
1
A f t er r e R W
R W
0
0: Single-chip mode
1:
0:
Not available
1:
0: 0 page
1: 1 page
1
RW
3, 4 Fix these bits to “1.”
1
RW
5 Nothing is assigned. This bit is write disable bit.
When this bit is read out, the value is “1.”
b7 b6
6, 7 Clock switch bits
(CM6, CM7)
0 0: f(XIN) = 8 MHz
0 1: f(XIN) = 12 MHz
1 0: f(XIN) = 16 MHz
1 1: Do not set
1
R W
0
RW
: Bit in which nothing is assigned
Notes 1: Values immediately after reset release
0 ••••••••••••••••••“0” after reset release
1 ••••••••••••••••••“1” after reset release
Indeterminate•••Indeterminate after reset
release
2: Bit attributes••••••The attributes of control register bits are classified into 3 types : read-only, write-only
and read and write. In the figure, these attributes are represented as follows :
R••••••Read
W••••••Write
W ••••••Write enabled
R ••••••Read enabled
– ••••••Read disabled
– ••••••Write disabled
✽ ••••••“0” can be set by software, but “1”
cannot be set.
Rev. 1.0
118
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00C116, 00C316, 00C516
Port Pi Direction Register
b7 b6 b5 b4 b3 b2 b1 b0
Port Pi direction register (PiD) (i=0,1,2) [Addresses 00C1 16, 00C316, 00C516]
B
0
Name
Functions
After reset R W
0 : Port Pi0 input mode
1 : Port Pi0 output mode
0
R W
1
0 : Port Pi1 input mode
1 : Port Pi1 output mode
0
R W
2
0 : Port Pi2 input mode
1 : Port Pi2 output mode
0
R W
3
0 : Port Pi3 input mode
1 : Port Pi3 output mode
0
R W
4
0 : Port Pi4 input mode
1 : Port Pi4 output mode
0
R W
5
0 : Port Pi5 input mode
1 : Port Pi5 output mode
0
R W
6
0 : Port Pi6 input mode
1 : Port Pi6 output mode
0
R W
7
0 : Port Pi7 input mode
1 : Port Pi7 output mode
0
R W
Port Pi direction register
Address 00C716
Port P3 Direction Register
b7 b6 b5 b4 b3 b2 b1 b0
Port P3 direction register (P3D) [Address 00C7 16]
B
0
Name
Port P3 direction register
1
Functions
After reset R W
0 : Port P30 input mode
1 : Port P30 output mode
0
R W
0 : Port P31 input mode
1 : Port P31 output mode
0
R W
2
Port P30 output structure
selection bit (P30C)
0 : CMOS output
1 : N-channel open-drain output
0
R W
3
Port P31 output structure
selection bit (P30C)
0 : CMOS output
1 : N-channel open-drain output
0
R W
0
R —
0
R W
4, 5, Nothing is assigned. These bits are write disable bits.
7 When these bits are read out, the values are “0.”
6
Timer 3 count source
selection bit (T3SC)
Refer to Timer section.
Rev. 1.0
119
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00CB16
OSD Port Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
OSD port control register (PF ) [Address 00CB16]
B
Name
Functions
0, 1 Fix these bits to “0.”
After reset R W
0
R —
2
Port P52 output signal
selection bit (PF2)
0 : R signal output
1 : Port P52 output
0
R W
3
Port P53 output signal
selection bit (PF3)
0 : G signal output
1 : Port P53 output
0
R W
4
Port P54 output signal
selection bit (PF4)
0 : B signal output
1 : Port P54 output
0
R W
5
Port P55 output signal
selection bit (PF5)
0 : OUT1 signal output
1 : Port P53 output
0
R W
6
Nothing is assigned. This bit is write disable bit.
When this bit is read out, the value is “0.”
0
R —
7
Port P10 output signal
selection bit (PF7)
0
R W
0 : Port P10 output
1 : OUT2 signal output
Address 00D016
OSD Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0
OSD control register (OC) [Address 00D0 16]
B
Functions
Name
OSD control bit
(OC0) (See note)
Automatic solid space
control bit (OC1)
Window control bit
(OC2)
0 : All-blocks display off
1 : All-blocks display on
0 : OFF
1 : ON
0 : OFF
1 : ON
CC mode clock
selection bit (OC3)
4 OSD mode clock
selection bit (OC4)
0
1
2
3
5, 6 OSC1 clock
selection bit
(OC5, OC6)
7 Fix this bit to “0.”
After reset R W
0
R W
0
R W
0
R W
0 : Data slicer clock
1 : Clock from OSC1 pin
0
R W
0 : Data slicer clock
1 : Clock from OSC1 pin
0
R W
0
R W
0
R W
b6 b5
0 0: 32 kHz oscillating
0 1: Do not set.
1 0: LC oscillating,
Ceramic oscillating
1 1: Do not set.
Note: Even this bit is switched during display, the display screen
remains unchanged until a rising (falling) of the next V SYNC.
Rev. 1.0
120
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00D116
Horizontal Position Register
b7 b6 b5 b4 b3 b2 b1 b0
Horizontal position register (HP) [Address 00D1 16]
B
Name
Functions
0 Horizontal display start Horizontal display start positions
128 steps (00 16 to 7F 16)
to position control bits
6 (HP0 to HP6)
(1 step is 4T OSC)
7 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
After reset R W
0
R W
0
R —
Note: The setting value synchronizes with the V SYNC.
Address 00D216, 00D316
Block Control register i
b7 b6 b5 b4 b3 b2 b1 b0
Block control register i (BCi) (i=1, 2) [Addresses 00D2
B
Name
0, 1 Display mode
selection bits
(BCi0, BCi1)
(See note 1)
2, 3 Dot size selection
bits (BCi2, BCi3)
b4
0
0
1
1
0
Pre-divide ratio
selection bit (BCi4)
and 00D3 16]
After reset
Functions
b1 b0
4
16
1
0: Display OFF
1: CC mode
0: OSD mode (Border OFF)
1: OSD mode (Border ON)
b3
b2 Pre-divide Ratio
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
✕2
✕3
Dot Size
1Tc
1Tc
2Tc
3Tc
1Tc
1Tc
2Tc
3Tc
R W
Indeterminate R W
Indeterminate R W
✕ 1/2H
✕ 1H
✕ 2H
✕ 3H
✕ 1/2H Indeterminate
✕ 1H
✕ 2H
✕ 3H
R W
5
OUT1/OUT2 output control 0: OUT1 output control
1: OUT2 output control
bit (BCi5) (See note 1)
6
Vertical display start
position control bit
(BCi6)
BC16: Block 1
BC26: Block 1
Indeterminate R W
7
Window top/bottom
boundary control bit
(BCi7)
BC17: Window top boundary
BC27: Window bottom boundary
Indeterminate R W
Indeterminate R W
Notes 1: Bit RA3 of OSD RAM controls OUT1 output when bit 5 is “0.”
Bit RA3 of OSD RAM controls OUT2 output when bit 5 is “1.”
2: Tc is OSD clock cycle divided in pre-divide circuit.
3: H is HSYNC.
Rev. 1.0
121
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00D416, 00D516
Vertical Position Register i
b7 b6 b5 b4 b3 b2 b1 b0
Vertical position register i (VPi) (i = 1 and 2) [Addresses 00D416, 00D516]
B
Name
0
to
7
Vertical display start
position control bits
(VPi0 to VPi7)
(See note)
Functions
Vertical display start position =
2
TH ✕ (BCi6 ✕ 16 + n)
(n: setting value, TH: HSYNC cycle,
BCi6: bit 6 of block control register i)
After reset
R W
Inderterminate R W
Note: Set values except “0016” to VPi when BCi6 is “0.”
Address 00D616
Window Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Window register 1 (WN1) [Address 00D616]
B
0
to
7
Name
Window top boundary
control bits
(WN10 to WN17)
Functions
Window top border position =
2
TH ✕ (BC17 ✕ 16 + n)
(n: setting value, TH: HSYNC cycle,
BC17: bit 7 of block control register 1)
After reset
R W
Inderterminate R W
Notes 1: Set values except “0016” to WN1 when BC17 is “0.”
2: Set values fit for the following condition: WN1 < WN2.
Address 00D716
Window Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Window register 2 (WN2) [Address 00D716]
B
0
to
7
Name
Window bottom boundary
control bits
(WN20 to WN27)
Functions
Window bottom border position =
2
TH ✕ (BC27 ✕ 16 + n)
(n: setting value, TH: HSYNC cycle,
BC27: bit 7 of block control register 2)
After reset
R W
Inderterminate R W
Note: Set values fit for the following condition: WN1 < WN2.
Rev. 1.0
122
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00D816
I/O Polarity Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0
I/O polarity control register (PC) [Address 00D8 16]
B
Name
Functions
After reset R W
0
HSYNC input polarity
switch bit (PC0)
0 : Positive polarity input
1 : Negative polarity input
0
R W
1
VSYNC input polarity
switch bit (PC1)
0 : Positive polarity input
1 : Negative polarity input
0
R W
2
R, G, B output polarity
switch bit (PC2)
0 : Positive polarity output
1 : Negative polarity output
0
R W
3
OUT1 output polarity
switch bit (PC3)
0 : Positive polarity output
1 : Negative polarity output
0
R W
4
OUT2 output polarity
switch bit (PC4)
0 : Positive polarity output
1 : Negative polarity output
0
R W
5
Display dot line selection
bit (PC5) (See note)
0:“
0
R W
1
R —
0
R W
“
1:“
“
6
Field determination flag
(PC6)
7
Fix this bit to “0.”
” at even field
” at odd field
” at even field
” at odd field
0 : Even field
1 : Odd field
Note: Refer to the corresponding figure (8.11.14).
Address 00D916
Raster Color Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
Raster color register (RC) [Address 00D9 16]
B
Name
Functions
0
R W
0
R W
0
R W
0 : No output
1 : Output
0
R W
0 : No output
1 : Output
0
R W
0
R W
0
R W
Raster color R
control bit (RC0)
Raster color G
control bit (RC1)
Raster color B
control bit (RC2)
0 : No output
1 : Output
0 : No output
1 : Output
0 : No output
1 : Output
Raster color OUT1
control bit (RC3)
4 Raster color OUT2
control bit (RC4)
0
1
2
3
5, 6 Fix these bits to “0.”
7 Port function
selection bit (RC7)
After reset R W
0 : OSC1/X CIN, OSC2/X COUT
1 : P2 6, P27
Note: Either OSD clock source or 32 kHz oscillating clock is
selected by bits 5 and 6 of the OSD control register.
Rev. 1.0
123
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00DC16
Interrupt Input Polarity Register
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt input polarity register (RE) [Address 00DC 16]
B
Name
Functions
After reset
R W
0
INT1 polarity switch bit
(INT1)
0 : Positive polarity
1 : Negative polarity
0
R W
4
INT2 polarity switch bit
(INT2)
0 : Positive polarity
1 : Negative polarity
0
R W
5
INT3 polarity switch bit
(INT3)
0 : Positive polarity
1 : Negative polarity
0
R W
0
R —
4
to
7
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
Address 00E016
Data Slicer Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
0 1 1 0 0
Data slicer control register 1(DSC1) [Address 00E016]
B
Name
0
Data slicer and timing signal
generating circuit control bit (DSC10)
1 Selection bit of data slice reference
voltage generating field (DSC11)
2 Reference clock source
selection bit (DSC12)
3, 4 Fix these bits to “0.”
5, 6 Fix these bits to “1.”
7
Fix this bit to “0.”
Functions
0: Stopped
1: Operating
0: F2
1: F1
0: Video signal
1: HSYNC signal
After reset R W
0
R W
0
R W
0
R W
0
R W
0
R W
0
R W
Definition of fields 1 (F 1) and 2 (F 2)
F1: Hsep
Vsep
F2: Hsep
Vsep
Rev. 1.0
124
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00E116
Data Slicer Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
1
Data slicer control register 2 (DSC2) [Address 00E116]
B
Name
Functions
After reset
R W
0: Data is not latched yet
Indeterminate R —
and a clock-run-in is not
determined.
1: Data is latched and a
clock-run-in is determined.
0
Caption data latch
completion flag 1
(DSC20)
1
Fix this bit to “1.”
2
Test bit
Read-only
Indeterminate R —
3
Field determination
flag(DSC23)
0: F2
1: F1
Indeterminate R —
4
Vertical synchronous signal
(Vsep) generating method
selection bit (DSC24)
0: Method (1)
1: Method (2)
5
V-pulse shape
determination flag (DSC25)
0: Match
1: Mismatch
6
Fix this bit to “o.”
7
Test bit
0
R W
0
R W
Indeterminate R —
0
Read-only
R W
Indeterminate R —
Definition of fields 1 (F 1) and 2 (F 2)
F1: Hsep
Vsep
F2: Hsep
Vsep
Address 00E416
Clock Run-in Detect Register
b7 b6 b5 b4 b3 b2 b1 b0
Clock run-in detect register (CRD) [Address 00E4 16]
B
0
to
2
3
to
7
Name
Functions
After reset R W
Test bits
Read-only
0
R —
Clock run-in detection bit
(CRD3 to CRD7)
Number of reference clocks to
be counted in one clock run-in
pulse period.
0
R —
Rev. 1.0
125
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00E516
Data Clock Position Register
b7 b6 b5 b4 b3 b2 b1 b0
0
1
0
Data clock position register (DPS) [Address 00E516]
Name
B
Functions
After reset R W
0
Fix this bit to “0.”
1
R W
1
Fix this bit to “1.”
0
R W
2
Fix this bit to “0.”
0
R W
3
Data clock position set
bits (DPS3 to DPS7)
1
R W
4
to
7
0
Address 00E616
Caption Position Register
b7 b6 b5 b4 b3 b2 b1 b0
Caption Position Register (CPS) [Address 00E616]
Name
B
0
to
4
5
Functions
After reset
0
Caption position
bits(CPS0 to CPS4)
Caption data latch
completion flag 2
(CPS5)
6, 7 Slice line mode
specification bits
(in 1 field) (CPS6, CPS7)
R W
R W
0: Data is not latched yet and a Indeterminate R —
clock-run-in is not determined.
1: Data is latched and a
clock-run-in is determined.
Refer to the corresponding
Table (Table 8.10.1).
0
R W
Address 00E916
Sync Pulse Counter Register
b7 b6 b5 b4 b3 b2 b1 b0
Sync pulse counter register (HC) [Address 00E9 16]
B
Name
0
to
4
Count value (HC0 to HC4)
5
Count source (HC5)
Functions
0: HSYNC signal
1: Composite sync signal
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
After reset
R W
0
R —
0
R W
0
R —
Rev. 1.0
126
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00EB16
Serial I/O Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0
0
Serial I/O mode register (SM) [Address 00EB16]
B
Name
0, 1 Internal synchronous
clock selection bits
(SM0, SM1)
After reset R W
Functions
0
R W
b1 b0
0 0: f(XIN)/4 or f(XCIN)/4
0 1: f(XIN)/16 or f(XCIN)/16
1 0: f(XIN)/32 or f(XCIN)/32
1 1: f(XIN)/64 or f(XCIN)/64
2
Synchronous clock
selection bit (SM2)
0: External clock
1: Internal clock
0
R W
3
Port function
selection bit (SM3)
0: P20, P21
1: SCLK, SOUT
0
R W
0
R W
0
R W
6 Transfer clock input
0: Input signal from SIN pin
pin selection bit (SM6) 1: Input signal from SOUT pin
0
R W
7 Fix this bit to “0.”
0
R W
4 Fix this bit to “0.”
Transfer direction
selection bit (SM5)
5
0: LSB first
1: MSB first
Address 00EC16
A-D Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 1 (AD1) [Address 00EC16]
B
Name
Functions
0
to
2
Analog input pin selection
bits
(ADC10 to ADC12)
3
This bit is a write disable bit.
When this bit is read out, the value is “0.”
4
Storage bit of comparison
result (ADC14)
5
to
7
Nothing is assigned. This bits are write disable bits.
When these bits are read out, the values are “0.”
b2
0
0
0
0
1
1
1
1
b1
0
0
1
1
0
0
1
1
b0
0 : AD1
1 : AD2
0 : AD3
1 : AD4
0 : AD5
1 : AD6
0:
Do not set.
1:
0: Input voltage < reference voltage
1: Input voltage > reference voltage
After reset R W
0
R W
0
R —
Indeterminate
R W
0
R —
Rev. 1.0
127
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00ED16
A-D Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
A-D control register 2 (AD2) [Address 00ED 16]
B
0
to
5
Name
D-A converter set bits
(ADC20 to ADC25)
Functions
b5
0
0
0
b4
0
0
0
b3
0
0
0
b2
0
0
0
b1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
b0
0 : 1/128Vcc
1 : 3/128Vcc
0 : 5/128Vcc
After reset
R W
0
R W
0
R —
1 : 123/128Vcc
0 : 125/128Vcc
1 : 127/128Vcc
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are reed out, the values are “ 0.”
Address 00F416
Timer Mode Register 1
b7 b6 b5b4 b3 b2 b1 b0
Timer mode register 1 (TM1) [Address 00F4 16]
B
Name
0 Timer 1 count source
selection bit 1 (TM10)
After reset R W
Functions
0: f(XIN)/16 or f(X CIN)/16 (See note)
0
R W
1: Count source selected by bit 5 of TM1
1 Timer 2 count source
selection bit 1 (TM11)
0: Count source selected by bit 4 of TM1
1: External clock from TIM2 pin
0
R W
2 Timer 1 count
stop bit (TM12)
0: Count start
1: Count stop
0
R W
3 Timer 2 count stop
bit (TM13)
0: Count start
1: Count stop
0
R W
4 Timer 2 count source
selection bit 2
(TM14)
0: f(XIN)/16 or f(X CIN)/16 (See note)
1: Timer 1 overflow
0
R W
5 Timer 1 count source
selection bit 2 (TM15)
0: f(XIN)/4096 or f(X CIN)/4096 (See note)
1: External clock from TIM2 pin
0
R W
6 Timer 5 count source
selection bit 2 (TM16)
0: Timer 2 overflow
1: Timer 4 overflow
0
R W
7 Timer 6 internal count
source selection bit
(TM17)
0: f(XIN)/16 or f(X CIN)/16 (See note)
1: Timer 5 overflow
0
R W
Note: Either f(X IN) or f(X CIN) is selected by bit 7 of the CPU mode register.
Rev. 1.0
128
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00F516
Timer Mode Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Timer mode register 2 (TM2) [Address 00F5 16]
B
Name
0 Timer 3 count source
selection bit (TM20)
1, 4 Timer 4 count source
selection bits
(TM21, TM24)
After reset R W
Functions
(b6 at address 00C7 16)
0
0
1
1
b0
0 : f(X IN)/16 or f(X CIN)/16 (See note)
1 : f(X CIN)
0:
1 : External clock from TIM3 pin
b4
0
0
1
1
b1
0 : Timer 3 overflow signal
1 : f(X IN)/16 or f(X CIN)/16 (See note)
0 : f(X IN)/2 or f(X CIN)/2 (See note)
1 : f(X CIN)
0
R W
0
R W
2
Timer 3 count
stop bit (TM22)
0: Count start
1: Count stop
0
R W
3
Timer 4 count stop bit
(TM23)
0: Count start
1: Count stop
0
R W
5
Timer 5 count stop bit
(TM25)
0: Count start
1: Count stop
0
R W
6
Timer 6 count stop bit
(TM26)
0: Count start
1: Count stop
0
R W
7
Timer 5 count source
selection bit 1
(TM27)
0: f(XIN)/16 or f(X CIN)/16 (See note)
1: Count source selected by bit 6
of TM1
0
R W
Note: Either f(X IN) or f(X CIN) is selected by bit 7 of the CPU mode register.
Address 00F616
I2C Data Shift Register
b7 b6 b5 b4 b3 b2 b1 b0
2
I C data shift register1(S0) [Address 00F616]
B
Name
Functions
0
to
7
D0 to D7
This is an 8-bit shift register to store
receive data and write transmit data.
After reset
R W
Indeterminate R W
Note: To write data into the I2C data shift register after setting the MST bit to
“0” (slave mode), keep an interval of 8 machine cycles or more.
Rev. 1.0
129
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00F716
I2C Address Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C address register (S0D) [Address 00F716]
B
Name
Functions
After reset R W
<Only in 10-bit addressing (in slave) mode>
The last significant bit of address data is
compared.
0: Wait the first byte of slave address after
START condition
(read state)
1: Wait the first byte of slave address after
RESTART condition
(write state)
0
Read/write bit
(RBW)
1
to
7
Slave address
<In both modes>
(SAD0 to SAD6) The address data is compared.
0
R —
0
R W
Address 00F816
I2C Status Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C status register (S1) [Address 00F816]
B
0
Name
Functions
Last receive bit (LRB)
(See note)
0 : Last bit = “0 ”
1 : Last bit = “1 ”
1
General call detecting flag
(AD0) (See note)
2
3
After reset R W
Indeterminate
R —
0 : No general call detected
1 : General call detected
(See note)
0
R —
Slave address comparison
flag (AAS) (See note)
0 : Address mismatch
1 : Address match
0
R —
Arbitration lost detecting flag
(AL) (See note)
0 : Not detected
1 : Detected
0
R —
1
R W
0 : Bus free
1 : Bus busy
0
R W
b7
0
0
1
1
0
R W
4
I2C-BUS interface interrupt
request bit (PIN)
5
Bus busy flag (BB)
6, 7 Communication mode
specification bits
(TRX, MST)
(See note)
(See note)
(See note)
0 : Interrupt request issued
1 : No interrupt request issued
b6
0 : Slave recieve mode
1 : Slave transmit mode
0 : Master recieve mode
1 : Master transmit mode
Note : These bits and flags can be read out, but cannnot be written.
Rev. 1.0
130
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00F916
I2C Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I2C control register (S1D address 00F916)
B
Name
0
to
2
Bit counter
(Number of transmit/recieve
bits)
(BC0 to BC2)
b2
0
0
0
0
1
1
1
1
b0
0 :8
1 :7
0 :6
1 :5
0 :4
1 :3
0 :2
1 :1
Functions
0
R W
3
I2C-BUS interface use
enable bit (ESO)
0 :Disabled
1 :Enabled
0
R W
4
Data format selection
bit(ALS)
0 :Addressing mode
1 :Free data format
0
R W
5
Addressing format selection
bit (10BIT SAD)
0 :7-bit addressing format
1 :10-bit addressing format
0
R W
b7 b6 Connection port (See note)
0 0 :None
0 1 :SCL1, SDA1
1 0 :SCL2, SDA2
1 1 :SCL1, SDA1
SCL2, SDA2
0
R W
6, 7 Connection control bits
between I2C-BUS interface
and ports
b1
0
0
1
1
0
0
1
1
After reset R W
Note: When using ports P11-P14 as I2C-BUS interface, the output structure changes
automatically from CMOS output to N-channel open-drain output.
Address 00FA16
I2C Clock Control Register
b7 b6 b5 b4 b3 b2 b1 b0
I2 C clock control register (S2 : address 00FA 16)
B
0
to
4
Name
After reset R W
Functions
SCL frequency control Setup value Standard clock High speed
of CCR4–
mode
clock mode
bits
CCR0
(CCR0 to CCR4)
Setup disabled Setup disabled
00 to 02
03
Setup disabled
04
Setup disabled
250
05
100
400 (See note)
83.3
166
06
...
0
R W
0
R W
333
500/CCR value 1000/CCR value
1D
17.2
34.5
1E
16.6
1F
16.1
33.3
32.3
(at φ = 4 MHz, unit : kHz)
0: Standard clock mode
1: High-speed clock mode
5
SCL mode
specification bit
(FAST MODE)
6
ACK bit
(ACK BIT)
0: ACK is returned.
1: ACK is not returned.
0
R W
7
ACK clock bit
(ACK)
0: No ACK clock
1: ACK clock
0
R W
Note: At 4000kHz in the high-speed clock mode, the duty is as below .
“0” period : “1” period = 3 : 2
In the other cases, the duty is as below.
“0” period : “1” period = 1 : 1
Rev. 1.0
131
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00FB16
CPU Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0
1 1
CPU mode register (CM) [Address 00FB16]
B
Name
0, 1 Processor mode bits
(CM0, CM1)
Stack page selection
bit (CM2) (See note)
2
Functions
After reset R W
0
R W
1
RW
1
R W
0: LOW drive
1: HIGH drive
1
R W
0: Oscillating
1: Stopped
0
RW
0: XIN–XOUT selected
(high-speed mode)
1: XCIN–XCOUT selected
(high-speed mode)
0
RW
b1 b0
0
0
1
1
0: Single-chip mode
1:
0:
Not available
1:
0: 0 page
1: 1 page
3, 4 Fix these bits to “1.”
5 XCOUT drivability
selection bit (CM5)
6 Main Clock (XIN–XOUT)
stop bit
(CM6)
7 Internal system clock
selection bit
(CM7)
Note: This bit is set to “1” after the reset release.
Address 00FC16
Interrupt Request Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt request register 1 (IREQ1) [Address 00FC16]
B
0
1
2
3
4
5
6
7
Name
Functions
0 : No interrupt request issued
Timer 1 interrupt
request bit (TM1R) 1 : Interrupt request issued
Timer 2 interrupt
0 : No interrupt request issued
request bit (TM2R) 1 : Interrupt request issued
0 : No interrupt request issued
Timer 3 interrupt
request bit (TM3R) 1 : Interrupt request issued
Timer 4 interrupt
0 : No interrupt request issued
request bit (TM4R) 1 : Interrupt request issued
OSD interrupt request 0 : No interrupt request issued
1 : Interrupt request issued
bit (OSDR)
0 : No interrupt request issued
VSYNC interrupt
request bit (VSCR) 1 : Interrupt request issued
INT3 external interrupt 0 : No interrupt request issued
request bit (VSCR) 1 : Interrupt request issued
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
After reset R W
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R —
✽: “0” can be set by software, but “1” cannot be set.
Rev. 1.0
132
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00FD16
Interrupt Request Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0
Interrupt request register 2 (IREQ2) [Address 00FD16]
B
Name
0
INT1 external interrupt
request bit (INIR)
Data slicer interrupt
request bit (DSR)
1
2
Serial I/O interrupt
request bit (S1R)
3 f(XIN)/4096 interrupt
request bit (CKR)
4 INT2 external interrupt
request bit (IN2R)
5 Multi-master I2C-BUS
interrupt request bit (IICR)
6 Timer 5 • 6 interrupt
request bit (TM56R)
7
After reset R W
Functions
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0
R ✽
0 : No interrupt request issued
1 : Interrupt request issued
0
R ✽
0
R W
Fix this bit to “0.”
✽: “0” can be set by software, but “1” cannot be set.
Address 00FE16
Interrupt Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt control register 1 (ICON1) [Address 00FE16]
B
Name
0 Timer 1 interrupt
enable bit (TM1E)
1 Timer 2 interrupt
enable bit (TM2E)
2 Timer 3 interrupt
enable bit (TM3E)
3 Timer 4 interrupt
enable bit (TM4E)
4 OSD interrupt enable bit
(OSDE)
5 VSYNC interrupt enable
bit (VSCE)
6 INT3 external interrupt
enable bit (IN3E)
Functions
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
7 Nothing is assigned. This bit is a write disable
bit. When this bit is read out, the value is “0.”
After reset R W
0
R W
0
R W
0
R W
0
R W
0
R W
0
R W
0
R W
0
R —
Rev. 1.0
133
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 00FF16
Interrupt Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt control register 2 (ICON2) [Address 00FF16]
After reset R W
B
Name
Functions
0
INT1 external interrupt
enable bit (IN1E)
Data slicer interrupt
enable bit (DSE)
Serial I/O interrupt
enable bit (S1E)
f(XIN)/4096 interrupt
enable bit (CKE)
INT2 external interrupt
enable bit (IN2E)
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0
R W
0
R W
0
R W
0
R W
0
R W
5 Multi-master I2C-BUS
interface interrupt enable
bit (IICE)
6 Timer 5 • 6 interrupt
enable bit (TM56E)
0 : Interrupt disabled
1 : Interrupt enabled
0
R W
0 : Interrupt disabled
1 : Interrupt enabled
0
R W
7 Timer 5 • 6 interrupt
switch bit (TM56C)
0 : Timer 5
1 : Timer 6
0
R W
1
2
3
4
Address 020816
PWM Mode Register 1
b7 b6 b5 b4 b3 b2 b1 b0
PWM mode register 1 (PM1) [Address 020816]
B
0
Name
PWM counts source
selection bit (PM10)
Functions
0 : Count source supply
1 : Count source stop
After reset R W
0
R W
1, 2 Nothing is assigned. These bits are write disable bits. Indeterminate R —
When these bits are read out, the values are “0.”
3
PWM output polarity
selection bit (PM13)
0 : Positive polarity
1 : Negative polarity
0
R W
4 Nothing is assigned. These bits are write disable bits. Indeterminate R —
to When these bits are read out, the values are “0.”
7
Rev. 1.0
134
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Address 020916
PWM Mode Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0 0
PWM mode register 2 (PM2) [Address 0209 16]
B
Name
0 P00/PWM0 output
selection bit (PM20)
Functions
0 : P0 0 output
1 : PWM0 output
After reset R W
0
R W
1
P01/PWM1 output
selection bit (PM21)
0 : P0 1 output
1 : PWM1 output
0
R W
2
P02/PWM2 output
selection bit (PM22)
0 : P0 2 output
1 : PWM2 output
0
R W
3
P03/PWM3 output
selection bit (PM23)
0 : P0 3 output
1 : PWM3 output
0
R W
4
P04/PWM4 output
selection bit (PM24)
0 : P0 4 output
1 : PWM4 output
0
R W
5
P05/PWM5 output
selection bit (PW25)
0: P05 output
1: PWM5 output
0
R W
0
R W
6, 7 Fix these bits to “0.”
Address 020E16
ROM Correction Enable Register
b7 b6 b5 b4 b3 b2 b1 b0
ROM correction enable register (RCR) [Address 020E
B
Name
Functions
0
Vector 1 enable bit (RC0)
1
Vector 2 enable bit (RC1)
2
to
7
Nothing is assigned. These bits are write disable bits. When
these bits are read out, the values are “0.”
16]
After reset
R W
0: Disabled
1: Enabled
0
R W
0: Disabled
1: Enabled
0
R W
0
R —
Rev. 1.0
135
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
22. PACKAGE OUTLINE
52P4B
Plastic 52pin 600mil SDIP
EIAJ Package Code
SDIP52-P-600-1.78
Weight(g)
5.1
Lead Material
Alloy 42/Cu Alloy
27
1
26
E
52
e1
c
JEDEC Code
–
Symbol
L
A1
A
A2
D
e
SEATING PLANE
b1
b
b2
A
A1
A2
b
b1
b2
c
D
E
e
e1
L
Dimension in Millimeters
Min
Nom
Max
–
–
5.5
0.51
–
–
–
3.8
–
0.4
0.5
0.6
0.9
1.0
1.3
0.65
0.75
1.05
0.22
0.27
0.34
45.65
45.85
46.05
12.85
13.0
13.15
–
1.778
–
–
15.24
–
3.0
–
–
0°
–
15°
Rev. 1.0
136
MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
HEAD OFFICE: 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Keep safety first in your circuit designs!
•
Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to
personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of non-flammable
material or (iii) prevention against any malfunction or mishap.
•
These materials are intended as a reference to assist our customers in the selection of the Mitsubishi semiconductor product best suited to the customer’s application; they do not convey any license under any intellectual property
rights, or any other rights, belonging to Mitsubishi Electric Corporation or a third party.
Mitsubishi Electric Corporation assumes no responsibility for any damage, or infringement of any third-party’s rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or circuit application examples
contained in these materials.
All information contained in these materials, including product data, diagrams, charts, programs and algorithms represents information on products at the time of publication of these materials, and are subject to change by
Mitsubishi Electric Corporation without notice due to product improvements or other reasons. It is therefore recommended that customers contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product
distributor for the latest product information before purchasing a product listed herein.
The information described here may contain technical inaccuracies or typographical errors. Mitsubishi Electric Corporation assumes no responsibility for any damage, liability, or other loss rising from these inaccuracies or errors.
Please also pay attention to information published by Mitsubishi Electric Corporation by various means, including the Mitsubishi Semiconductor home page (http://www.mitsubishichips.com).
When using any or all of the information contained in these materials, including product data, diagrams, charts, programs, and algorithms, please be sure to evaluate all information as a total system before making a final decision
on the applicability of the information and products. Mitsubishi Electric Corporation assumes no responsibility for any damage, liability or other loss resulting from the information contained herein.
Mitsubishi Electric Corporation semiconductors are not designed or manufactured for use in a device or system that is used under circumstances in which human life is potentially at stake. Please contact Mitsubishi Electric
Corporation or an authorized Mitsubishi Semiconductor product distributor when considering the use of a product contained herein for any specific purposes, such as apparatus or systems for transportation, vehicular, medical,
aerospace, nuclear, or undersea repeater use.
The prior written approval of Mitsubishi Electric Corporation is necessary to reprint or reproduce in whole or in part these materials.
If these products or technologies are subject to the Japanese export control restrictions, they must be exported under a license from the Japanese government and cannot be imported into a country other than the approved
destination.
Any diversion or reexport contrary to the export control laws and regulations of Japan and/or the country of destination is prohibited.
Please contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product distributor for further details on these materials or the products contained therein.
Notes regarding these materials
•
•
•
•
•
•
•
© 1999 MITSUBISHI ELECTRIC CORP.
New publication, effective Sep. 1999.
Specifications subject to change without notice.
REVISION HISTORY
Rev.
No.
1.0
M37273M8-XXXSP, M37273MF-XXXSP
M37273E8SP, M37273EFSP (Rev. 1.0) DATA SHEET
Revision Description
First Edition of PDF File
Rev.
date
9909
(1/1)