MYSON
TECHNOLOGY
MTV312M64
(Rev 0.99)
8051 Embedded Monitor Controller
Flash Type with ISP
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
8051 core, 12MHz operating frequency with double CPU clock option
0.35uM process; 5V/3.3V power supply and I/O; 3.3V core operating
1024-byte RAM; 64K-byte program Flash-ROM support In System Programming (ISP)
Maximum 14 channels of PWM DAC
Maximum 31 I/O pins
SYNC processor for composite separation/insertion, H/V polarity/frequency check and polarity adjustment
Built-in low power reset circuit
Built-in self-test pattern generator with four free-running timings
Compliant with VESA DDC1/2B/2Bi/2B+ standard
Dual slave IIC addresses; H/W auto transfer DDC1/DDC2x data
Single master IIC interface for internal device communication
Maximum 4-channel 6-bit ADC
Watchdog timer with programmable interval
Flash-ROM program code protection selection
40-pin DIP, 42-pin SDIP or 44-pin PLCC package
GENERAL DESCRIPTIONS
The MTV312M micro-controller is an 8051 CPU core embedded device especially tailored for CRT/LCD
Monitor applications. It includes an 8051 CPU core, 1024-byte SRAM, 14 built-in PWM DACs, VESA DDC
interface, 4-channel A/D converter, and a 64K-byte internal program Flash-ROM.
BLOCK DIAGRAM
P0.0-7
P1.0-7
P2.0-3
P3.0-2
P3.4-5
8051
CORE
RST
X1
X2
RD
WR
ALE
INT1
P0.0-7
P2.0-3
RD
WR
ALE
INT1
XFR
AD0-3
ADC
AUXRAM &
DDCRAM
H/VSYNC
CONTROL
HSYNC
VSYNC
HBLANK
VBLANK
PWM DAC
P6.0-7
P5.0-6
AUX
I/O
DA0-13
DDC & IIC
INTERFACE
ISCL
ISDA
HSCL
HSDA
P4.0-2
This datasheet contains new product information. Myson Technology reserves the rights to modify the product specification without
notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
Revision 0.99
-1-
2001/07/26
MTV312M64
MYSON
TECHNOLOGY
(Rev 0.99)
PIN CONNECTION
DA2/P5.2
DA1/P5.1
DA0/P5.0
VDD3
VDD
VSS
X2
X1
ISDA/P3.4/T0
ISCL/P3.5/T1
STOUT/P4.2
P6.2/AD2/HLFHI
P1.0
P1.1
P3.2/INT0
P1.2
P1.3
P1.4
P1.5
P1.6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
MTV312M
40 Pin
PDIP
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VSYNC
HSYNC
DA3/P5.3
DA4/P5.4
DA5/P5.5
DA8/HLFHO
DA9/HALFV
HBLANK/P4.1
VBLANK/P4.0
DA7/HCLAMP
DA6/P5.6
RST
P6.6/DA12
P6.5/DA11
P6.4/DA10
HSCL/P3.0/Rxd
HSDA/P3.1/Txd
P6.0/AD0
P6.1/AD1
P1.7
DA2/P5.2
DA1/P5.1
DA0/P5.0
VDD3
NC
NC
RST
VDD
VSS
X2
X1
ISDA/P3.4/T0
ISCL/P3.5/T1
STOUT/P4.2
P6.2/AD2/HLFHI
P1.0
P1.1
P3.2/INT0
P1.2
P1.3
P1.4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
MTV312M
42 Pin
SDIP
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
VSYNC
HSYNC
DA3/P5.3
DA4/P5.4
DA5/P5.5
DA8/HLFHO
DA9/HALFV
HBLANK/P4.1
VBLANK/P4.0
DA7/HCLAMP
DA6/P5.6
P6.6/DA12
P6.5/DA11
P6.4/DA10
HSCL/P3.0/Rxd
HSDA/P3.1/Txd
P6.0/AD0
P6.1/AD1
P1.7
P1.6
P1.5
DA5/P5.5
DA4/P5.4
DA3/P5.3
HSYNC
VSYNC
DA2/P5.2
DA1/P5.1
DA0/P5.0
VDD3
NC
NC
40
41
42
43
44
1
2
3
4
5
6
RST
VDD
P6.3/AD3
VSS
X2
X1
ISDA/P3.4/T0
ISCL/P3.5/T1
STOUT/P4.2
P6.2/AD2/HLFHI
P1.0
7
8
9
10
11
12
13
14
15
16
17
MTV312M
44 Pin
PLCC
39
38
37
36
35
34
33
32
31
30
29
DA8/HLFHO
DA9/HALFV
HBLANK/P4.1
VBLANK/P4.0
DA7/HCLAMP
DA6/P5.6
P6.7/DA13
P6.6/DA12
P6.5/DA11
P6.4/DA10
HSCL/P3.0/Rxd
28
27
26
25
24
23
22
21
20
19
18
HSDA/P3.1/Txd
P6.0/AD0
P6.1/AD1
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P3.2/INT0
P1.1
Revision 0.99
-2-
2001/07/26
MTV312M64
MYSON
TECHNOLOGY
(Rev 0.99)
PIN CONFIGURATION
A “CMOS output pin” means it can sink and drive at least 4mA current. It is not recommended to use such
pin as input function.
A “open drain pin” means it can sink at least 4mA current but only drive 10~20uA to VDD. It can be used as
input or output function and needs an external pull up resistor.
A “8051 standard pin” is a pseudo open drain pin. It can sink at least 4mA current when output is at low level,
and drives at least 4mA current for 160nS when output transits from low to high, then keeps driving at 100uA
to maintain the pin at high level. It can be used as input or output function. It needs an external pull up
resistor when driving heavy load device.
4mA
10uA
120uA
8051 Standard Pin
2 OSC
period
delay
Pin
4mA
Output
Data
Input
Data
4mA
No Current
Output
Data
Pin
Input
Data
Pin
4mA
4mA
Output
Data
Open Drain Pin
CMOS Output Pin
POWER CONFIGURATION
The MTV312M can work on 5V or 3.3V power supply system.
In 5V power system, the VDD pin is connected to 5V power and the VDD3 needs an external capacitor, all
output pins can swing from 0~5V, input pins can accept 0~5V input range. And ADC conversion range is 5V.
However, X1 and X2 pins must be kept below 3.3V.
In 3.3V power system, the VDD and VDD3 are connected to 3.3V power, all output pins swing from 0~3.3V,
HSYNC, VSYNC and open drain pin can accept 0~5V input range, other pins must be kept below 3.3V. And
the ADC conversion range is 3.3V.
3.3V
5V
VDD
VDD
VDD3
VDD3
10u
MTV312M in
3.3V System
MTV312M in
5V System
Revision 0.99
-3-
2001/07/26
MTV312M64
MYSON
TECHNOLOGY
(Rev 0.99)
PIN DESCRIPTION
Name
VDD3
VDD
VSS
X2
X1
RST
DA0/P5.0
DA1/P5.1
DA2/P5.2
DA3/P5.3
DA4/P5.4
DA5/P5.5
DA6/P5.6
DA7/HCLAMP
DA8/HLFHO
DA9/HALFV
HSCL/P3.0/Rxd
HSDA/P3.1/Txd
P3.2/INT0
ISDA/P3.4/T0
ISCL/P3.5/T1
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P6.0/AD0
P6.1/AD1
P6.2/AD2/HLFHI
P6.3/AD3
P6.4/DA10
P6.5/DA11
P6.6/DA12
P6.7/DA13
VBLANK/P4.0
HBLANK/P4.1
STOUT/P4.2
HSYNC
VSYNC
Revision 0.99
PIN NO.
40 42 44
4
4
4
5
8
8
6
9
10
7
10 11
8
11 12
29
7
7
3
3
3
2
2
2
1
1
1
38 40 42
37 39 41
36 38 40
30 32 34
31 33 35
35 37 39
34 36 38
25 28 29
24 27 28
15 18 19
9
12 13
10 13 14
13 16 17
14 17 18
16 19 20
17 20 21
18 21 22
19 22 23
20 23 24
21 24 25
23 26 27
22 25 26
12 15 16
9
26 29 30
27 30 31
28 31 32
33
32 34 36
33 35 37
11 14 15
39 41 43
40 42 44
Type
Description
O
O
I
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I
I
3.3V core power
5V or 3.3V Positive Power Supply
Ground
Oscillator output
Oscillator input
Active high reset
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / General purpose I/O (CMOS)
PWM DAC output / Hsync clamp pulse output (CMOS)
PWM DAC output / Hsync half freq. Output (open drain)
PWM DAC output / Vsync half freq. Output (open drain)
Slave IIC clock / General purpose I/O / Rxd (open drain)
Slave IIC data / General purpose I/O / Txd (open drain)
General purpose I/O / INT0 (8051 standard)
Master IIC data / General purpose I/O / T0 (open drain)
Master IIC clock / General purpose I/O / T1 (open drain)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O (CMOS output or 8051 standard)
General purpose I/O / ADC Input (CMOS)
General purpose I/O / ADC Input (CMOS)
General purpose I/O / ADC Input / Half Hsync input (CMOS)
General purpose I/O / ADC Input (CMOS)
General purpose I/O / PWM DAC output (CMOS)
General purpose I/O / PWM DAC output (CMOS)
General purpose I/O / PWM DAC output (CMOS)
General purpose I/O / PWM DAC output (CMOS)
Vertical blank (CMOS) / General purpose Output (CMOS)
Horizontal blank (CMOS) / General purpose Output (CMOS)
Self-test video output (CMOS) / General purpose Output (CMOS)
Horizontal SYNC or Composite SYNC Input
Vertical SYNC input
-4-
2001/07/26
MTV312M64
MYSON
TECHNOLOGY
(Rev 0.99)
FUNCTIONAL DESCRIPTIONS
1. 8051 CPU Core
The CPU core of MTV312M is compatible with the industry standard 8051, which includes 256 bytes RAM,
Special Function Registers (SFR), two timers, five interrupt sources and a serial interface. The CPU core
fetches its program code from the 64K bytes Flash in MTV312M. It uses Port0 and Port2 to access the
“external special function register” (XFR) and external auxiliary RAM (AUXRAM).
The CPU core can run at double rate when FclkE is set. Once the bit is set, the CPU runs as if a 24MHz
X’tal is applied on MTV312M, but the peripherals (IIC, DDC, H/V processor) still run at the original frequency.
Note: All registers listed in this document reside in 8051’s external RAM area (XFR). For internal RAM
memory map, please refer to 8051 spec.
2. Memory Allocation
2.1 Internal Special Function Registers (SFR)
The SFR is a group of registers that are the same as standard 8051.
2.2 Internal RAM
There are total 256 bytes internal RAM in MTV312M, the same as standard 8052.
2.3 External Special Function Registers (XFR)
The XFR is a group of registers allocated in the 8051 external RAM area F00h - FFFh. These registers are
used for special functions. Programs can use "MOVX" instruction to access these registers.
2.4 Auxiliary RAM (AUXRAM)
There are total 512 bytes auxiliary RAM allocated in the 8051 external RAM area 800h - 9FFh. Programs
can use "MOVX" instruction to access the AUXRAM.
2.5 Dual Port RAM (DDCRAM)
There are 256 bytes Dual Port RAM allocated in the 8051 external RAM area E00h - EFFh. Programs can
use "MOVX" instruction to access the RAM. The external DDC1/2 Host can access the RAM as if a 24LC02
EEPROM is connected onto the interface.
FFh
80h
7Fh
Internal RAM
SFR
Accessible by
indirect
addressing only
(Using
MOV A,@Ri
instruction)
Accessible by
direct addressing
FFFh
XFR
EFFh
Accessible by
indirect external
RAM addressing
(Using MOVX
instruction)
F00h
Internal RAM
Accessible by
indirect external
RAM addressing
(Using MOVX
instruction)
E00h
9FFh
Accessible by
direct and indirect
addressing
AUXRAM
Accessible by
indirect external
RAM addressing
(Using MOVX
instruction
00h
Revision 0.99
DDCRAM
800h
-5-
2001/07/26
MTV312M64
MYSON
TECHNOLOGY
(Rev 0.99)
3. Chip Configuration
The Chip Configuration registers define configuration of the chip and function of the pins.
Reg name
PADMOD
PADMOD
PADMOD
PADMOD
PADMOD
PADMOD
OPTION
addr
F50h(w)
F51h(w)
F52h(w)
F53h(w)
F54h(w)
F55h(w)
F56h(w)
bit7
DA13E
HIICE
P67oe
COP17
PWMF
bit6
DA12E
P56E
IIICE
P56oe
P66oe
COP16
DIV253
bit5
DA11E
P55E
HLFVE
P55oe
P65oe
COP15
FclkE
Bit4
DA10E
P54E
HLFHE
P54oe
P64oe
COP14
bit3
AD3E
P53E
HCLPE
P53oe
P63oe
COP13
ENSCL
bit2
AD2E
P52E
P42E
P52oe
P62oe
COP12
Msel
bit1
AD1E
P51E
P41E
P51oe
P61oe
COP11
MIICF1
bit0
AD0E
P50E
P40E
P50oe
P60oe
COP10
MIICF0
PADMOD (w) : Pad mode control registers. (All are "0" in Chip Reset)
DA13E = 1
→ Pin “P6.7/DA13” is DA13.
=0
→ Pin “P6.7/DA13” is P6.7.
DA12E = 1
→ Pin “P6.6/DA12” is DA12.
=0
→ Pin “P6.6/DA12” is P6.6.
DA11E = 1
→ Pin “P6.5/DA11” is DA11.
=0
→ Pin “P6.5/DA11” is P6.5.
DA10E = 1
→ Pin “P6.4/DA10” is DA10.
=0
→ Pin “P6.4/DA10” is P6.4.
AD3E = 1
→ Pin “P6.3/AD3” is AD3.
=0
→ Pin “P6.3/AD3” is P6.3.
AD2E = 1
→ Pin “P6.2/AD2” is AD2.
=0
→ Pin “P6.2/AD2” is P6.2.
AD1E = 1
→ Pin “P6.1/AD1” is AD1.
=0
→ Pin “P6.1/AD1” is P6.1.
AD0E = 1
→ Pin “P6.0/AD0” is AD0.
=0
→ Pin “P6.0/AD0” is P6.0.
P56E = 1
→ Pin “DA6/P5.6” is P5.6.
=0
→ Pin “DA6/P5.6” is DA6.
P55E = 1
→ Pin “DA5/P5.5” is P5.5.
=0
→ Pin “DA5/P5.5” is DA5.
P54E = 1
→ Pin “DA4/P5.4” is P5.4.
=0
→ Pin “DA4/P5.4” is DA4.
P53E = 1
→ Pin “DA3/P5.3” is P5.3.
=0
→ Pin “DA3/P5.3” is DA3.
P52E = 1
→ Pin “DA2/P5.2” is P5.2.
=0
→ Pin “DA2/P5.2” is DA2.
P51E = 1
→ Pin “DA1/P5.1” is P5.1.
=0
→ Pin “DA1/P5.1” is DA1.
P50E = 1
→ Pin “DA0/P5.0” is P5.0.
=0
→ Pin “DA0/P5.0” is DA0.
HIICE = 1
→ Pin “HSCL/P3.0/Rxd” is HSCL;
pin “HSDA/P3.1/Txd” is HSDA.
=0
→ Pin “HSCL/P3.0/Rxd” is P3.0/Rxd;
pin “HSDA/P3.1/Txd” is P3.1/Txd.
IIICE = 1
→ Pin “ISDA/P3.4/T0” is ISDA;
pin “ISCL/P3.5/T1” is ISCL.
=0
→ Pin “ISDA/P3.4/T0” is P3.4/T0;
pin “ISCL/P3.5/T1” is P3.5/T1.
HLFVE = 1
→ Pin “DA9/HALFV” is VSYNC half frequency output.
=0
→ Pin “DA9/HALFV” is DA9.
HLFHE = 1
→ Pin “DA8/HALFH” is HSYNC half frequency output.
=0
→ Pin “DA8/HALFH” is DA8.
Revision 0.99
-6-
2001/07/26
MYSON
TECHNOLOGY
HCLPE = 1
=0
P42E = 1
=0
P41E = 1
=0
P40E = 1
=0
P56oe = 1
=0
P55oe = 1
=0
P54oe = 1
=0
P53oe = 1
=0
P52oe = 1
=0
P51oe = 1
=0
P50oe = 1
=0
P67oe = 1
=0
P66oe = 1
=0
P65oe = 1
=0
P64oe = 1
=0
P63oe = 1
=0
P62oe = 1
=0
P61oe = 1
=0
P60oe = 1
=0
COP17 = 1
=0
COP16 = 1
=0
COP15 = 1
=0
COP14 = 1
=0
COP13 = 1
=0
COP12 = 1
=0
COP11 = 1
=0
Revision 0.99
MTV312M64
(Rev 0.99)
→ Pin “DA7/HCLAMP” is HSYNC clamp pulse output.
→ Pin “DA7/HCLAMP” is DA7.
→ Pin “STOUT/P4.2” is P4.2.
→ Pin “STOUT/P4.2” is STOUT.
→ Pin “HBLANK/P4.1” is P4.1.
→ Pin “HBLANK/P4.1” is HBLANK.
→ Pin “VBLANK/P4.0” is P4.0.
→ Pin “VBLANK/P4.0” is VBLANK.
→ P5.6 is output pin.
→ P5.6 is input pin.
→ P5.5 is output pin.
→ P5.5 is input pin.
→ P5.4 is output pin.
→ P5.4 is input pin.
→ P5.3 is output pin.
→ P5.3 is input pin.
→ P5.2 is output pin.
→ P5.2 is input pin.
→ P5.1 is output pin.
→ P5.1 is input pin.
→ P5.0 is output pin.
→ P5.0 is input pin.
→ P6.7 is output pin.
→ P6.7 is input pin.
→ P6.6 is output pin.
→ P6.6 is input pin.
→ P6.5 is output pin.
→ P6.5 is input pin.
→ P6.4 is output pin.
→ P6.4 is input pin.
→ P6.3 is output pin.
→ P6.3 is input pin.
→ P6.2 is output pin.
→ P6.2 is input pin.
→ P6.1 is output pin.
→ P6.1 is input pin.
→ P6.0 is output pin.
→ P6.0 is input pin.
→ Pin “P1.7” is CMOS Output.
→ Pin “P1.7” is 8051 standard I/O.
→ Pin “P1.6” is CMOS Output.
→ Pin “P1.6” is 8051 standard I/O.
→ Pin “P1.5” is CMOS Output.
→ Pin “P1.5” is 8051 standard I/O.
→ Pin “P1.4” is CMOS Output.
→ Pin “P1.4” is 8051 standard I/O.
→ Pin “P1.3” is CMOS Output.
→ Pin “P1.3” is 8051 standard I/O.
→ Pin “P1.2” is CMOS Output.
→ Pin “P1.2” is 8051 standard I/O.
→ Pin “P1.1” is CMOS Output.
→ Pin “P1.1” is 8051 standard I/O.
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2001/07/26
MTV312M64
MYSON
TECHNOLOGY
COP10 = 1
=0
(Rev 0.99)
→ Pin “P1.0” is CMOS Output.
→ Pin “P1.0” is 8051 standard I/O.
OPTION (w) : Chip option configuration (All are "0" in Chip Reset).
PWMF = 1
→ Selects 94KHz PWM frequency.
=0
→ Selects 47KHz PWM frequency.
DIV253 = 1
→ PWM pulse width is 253-step resolution.
=0
→ PWM pulse width is 256-step resolution.
FclkE = 1
→ CPU is running at double rate
=0
→ CPU is running at normal rate
ENSCL = 1
→ Enable slave IIC block to hold HSCL pin low while MTV312M64 is unable to
catch-up with the external master's speed.
Msel
=1
→ Master IIC block connect to HSCL/HSDA pins.
=0
→ Master IIC block connect to ISCL/ISDA pins.
MIICF1,MIICF0 = 1,1 → Selects 400KHz Master IIC frequency.
= 1,0 → Selects 200KHz Master IIC frequency.
= 0,1 → Selects 50KHz Master IIC frequency.
= 0,0 → Selects 100KHz Master IIC frequency.
4. I/O Ports
4.1 Port1
Port1 is a group of pseudo open drain pins or CMOS output pins. It can be used as general purpose I/O.
Behavior of Port1 is the same as standard 8051.
4.2 P3.0-2, P3.4-5
If these pins are not set as IIC pins, Port3 can be used as general purpose I/O, interrupt, UART and Timer
pins. Behavior of Port3 is the same as standard 8051.
4.3 Port4, Port5 and Port6
Port5 and Port6 are used as general purpose I/O. S/W needs to set the corresponding P5(n)oe and P6(n)oe
to define whether these pins are input or output. Port4 is pure output.
Reg name
PORT5
PORT5
PORT5
PORT5
PORT5
PORT5
PORT5
PORT6
PORT6
PORT6
PORT6
PORT6
PORT6
PORT6
PORT6
PORT4
PORT4
PORT4
Revision 0.99
addr
F30h(r/w)
F31h(r/w)
F32h(r/w)
F33h(r/w)
F34h(r/w)
F35h(r/w)
F36h(r/w)
F38h(r/w)
F39h(r/w)
F3Ah(r/w)
F3Bh(r/w)
F3Ch(r/w)
F3Dh(r/w)
F3Eh(r/w)
F3Fh(r/w)
F58h(w)
F59h(w)
F5Ah(w)
bit7
bit6
bit5
-8-
bit4
bit3
bit2
bit1
bit0
P50
P51
P52
P53
P54
P55
P56
P60
P61
P62
P63
P64
P65
P66
P67
P40
P41
P42
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PORT5 (r/w) :
Port 4 data input/output value.
PORT6 (r/w) :
Port 5 data input/output value.
PORT4 (w) :
Port 6 data output value.
MTV312M64
(Rev 0.99)
5. PWM DAC
Each output pulse width of PWM DAC converter is controlled by an 8-bit register in XFR. The frequency of
PWM clock is 47KHz or 94KHz, selected by PWMF. And the total duty cycle step of these DAC outputs is
253 or 256, selected by DIV253. If DIV253=1, writing FDH/FEH/FFH to DAC register generates stable high
output. If DIV253=0, the output pulses low at least once even if the DAC register's content is FFH. Writing
00H to DAC register generates stable low output.
Reg name
DA0
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
DA9
DA10
DA11
DA12
DA13
addr
F20h(r/w)
F21h(r/w)
F22h(r/w)
F23h(r/w)
F24h(r/w)
F25h(r/w)
F26h(r/w)
F27h(r/w)
F28h(r/w)
F29h(r/w)
F2Ah(r/w)
F2Bh(r/w)
F2Ch(r/w)
F2Dh(r/w)
bit7
bit6
bit5
bit4
bit3
bit2
Pulse width of PWM DAC 0
Pulse width of PWM DAC 1
Pulse width of PWM DAC 2
Pulse width of PWM DAC 3
Pulse width of PWM DAC 4
Pulse width of PWM DAC 5
Pulse width of PWM DAC 6
Pulse width of PWM DAC 7
Pulse width of PWM DAC 8
Pulse width of PWM DAC 9
Pulse width of PWM DAC 10
Pulse width of PWM DAC 11
Pulse width of PWM DAC 12
Pulse width of PWM DAC 13
bit1
bit0
DA0-13 (r/w) : The output pulse width control for DA0-13.
* All of PWM DAC converters are centered with value 80h after power on.
6. H/V SYNC Processing
The H/V SYNC processing block performs the functions of composite signal separation/insertion. SYNC
inputs presence check, frequency counting, polarity detection and control, as well as the protection of
VBLANK output while VSYNC speeds up in high DDC communication clock rate.
Based on the digital filter, the present and frequency function block treat any pulse shorter than one OSC
period (83.33ns) as noise, between one and two OSC period (83.33ns to 166.67ns) as unknown region, and
longer than two OSC period (166.67ns) as pulse.
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Present
Check
Vpre
Polarity Check &
Freq. Count
Vfreq
Vpol
Digital Filter
Vbpl
VSYNC
XOR
CVSYNC
Vself
Present
Check
Digital Filter
Polarity Check &
Sync Seperator
Hpol
Present Check &
Freq. Count
Hpre
Hfreq
XOR
VBLANK
XOR
HBLANK
CVpre
Hbpl
Composite
Pulse Insert
XOR
HSYNC
Hself
H/V SYNC Processor Block Diagram
6.1 Composite SYNC separation/insertion
The MTV312M continuously monitors the input HSYNC. If the vertical SYNC pulse can be extracted from
the input, a CVpre flag is set and users can select the extracted "CVSYNC" for the source of polarity check,
frequency count, and VBLANK output. The CVSYNC then has 8us delay compared to the original signal.
The MTV312M can also insert pulse to HBLANK output during composite VSYNC’s active time. The width of
insert pulse is 1/8 HSYNC period and the insertion frequency can adapt to original HSYNC. The insert pulse
of HBLANK can be disabled or enabled by setting “NoHins” control bit.
6.2 H/V Frequency Counter
MTV312M can discriminate HSYNC/VSYNC frequency and save the information in XFRs. The 14-bit
Hcounter counts the time of 64xHSYNC period, then loads the result into the HCNTH/HCNTL latch. The
output value is then [(128000000/H-Freq) - 1], updated once per VSYNC/CVSYNC period when
VSYNC/CVSYNC is present or continuously updated when VSYNC/CVSYNC is non-present. The 12-bit
Vcounter counts the time between two VSYNC pulses, then loads the result into the VCNTH/VCNTL latch.
The output value is then (62500/V-Freq), updated every VSYNC/CVSYNC period. An extra overflow bit
indicates the condition of H/V counter overflow. The VFchg/HFchg interrupt is set when VCNT/HCNT value
changes or overflows. Table 6.2.1 and Table 6.2.2 show the HCNT/VCNT value under the operations of
12MHz.
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6.2.1 H-Freq Table
H-Freq(KHZ)
1
2
3
4
5
6
7
8
9
10
11
12
31.5
37.5
43.3
46.9
53.7
60.0
68.7
75.0
80.0
85.9
93.8
106.3
Output Value (14 bits)
12MHz OSC (hex / dec)
0FDEh / 4062
0D54h / 3412
0B8Bh / 2955
0AA8h / 2728
094Fh / 2383
0854h / 2132
0746h / 1862
06AAh / 1706
063Fh / 1599
05D1h / 1489
0554h / 1364
04B3h / 1203
6.2.2 V-Freq Table
V-Freq(Hz)
1
2
3
4
5
6
56
60
70
72
75
85
Output value (12bits)
12MHz OSC (hex / dec)
45Ch / 1116
411h / 1041
37Ch / 892
364h / 868
341h / 833
2DFh / 735
6.3 H/V Present Check
The Hpresent function checks the input HSYNC pulse, and the Hpre flag is set when HSYNC is over 10KHz
or cleared when HSYNC is under 10Hz. The Vpresent function checks the input VSYNC pulse, and the Vpre
flag is set when VSYNC is over 40Hz or cleared when VSYNC is under 10Hz. The HPRchg interrupt is set
when the Hpre value changes. The VPRchg interrupt is set when the Vpre/CVpre value change.
6.4 H/V Polarity Detect
The polarity functions detect the input HSYNC/VSYNC high and low pulse duty cycle. If the high pulse
duration is longer than that of the low pulse, the negative polarity is asserted; otherwise, positive polarity is
asserted. The HPLchg interrupt is set when the Hpol value changes. The VPLchg interrupt is set when the
Vpol value changes.
6.5 Output HBLANK/VBLANK Control and Polarity Adjust
The HBLANK is the mux output of HSYNC, composite Hpulse and self-test horizontal pattern. The VBLANK
is the mux output of VSYNC, CVSYNC and self-test vertical pattern. The mux selection and output polarity
are S/W controllable. The VBLANK output is cut off when VSYNC frequency is over 250Hz. The
HBLANK/VBLANK shares the output pin with P4.1/ P4.0.
6.6 Self Test Pattern Generator
For testing purposes, this generator is able to generate 4 display patterns, namely positive cross-hatch,
negative cross-hatch, full white, and full black (shown as figures below). The HBLANK output frequency of
the pattern can be chosen to 95.2KHz, 63.5KHz, 47.6KHz and 31.75KHz. The VBLANK output frequency of
the pattern is 72Hz or 60Hz. It is originally designed to support monitor manufacturer to do burn-in test, or
offer end-user a reference to check the monitor. The output STOUT of the generator shares the output pin
with P4.2.
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Display Region
Revision 0.99
Positive cross-hatch
Negative cross-hatch
Full white
Full black
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(Rev 0.99)
MTV312M Self-Test Pattern Timing
63.5KHz, 60Hz
47.6KHz, 60Hz
31.7KHz, 60Hz
Time
H dots
Time
H dots
Time
H dots
Hor. Total time (A)
15.75us
1280
21.0us
1024
31.5us
640
Hor. Active time (D)
12.05us
979.3
16.07us
783.2
24.05us
488.6
Hor. F. P. (E)
0.2us
16.25
0.28us
12
0.45us
9
SYNC pulse width (B) 1.5us
122
2us
90
3us
61
Hor. B. P. (C)
2us
162.54
2.67us
110
4us
81.27
Vert. Total time (O)
Vert. Active time (R)
Vert. F. P. (S)
SYNC pulse width (P)
Vert. B. P. (Q)
Time
16.66ms
15.65ms
0.063ms
0.063ms
0.882ms
V lines
1024
962
3.87
3.87
54.2
Time
16.66ms
15.65ms
0.063ms
0.063ms
0.882ms
V lines
768
721.5
2.9
2.9
40.5
Time
16.66ms
15.65ms
0.063ms
0.063ms
0.882ms
V lines
480
451
1.82
1.82
25.4
95.2KHz, 72Hz
Time
H dots
10.5us
1600
8.03us
1224
0.14us
21
1.0us
152
1.33us
203
Time
13.89ms
13.03ms
0.052ms
0.052ms
0.756ms
V lines
1200
1126
4.5
4.5
65
* 8 x 8 blocks of cross hatch pattern in display region.
6.7 HSYNC Clamp Pulse Output
The HCLAMP output is activated by setting “HCLPE” control bit. The leading edge position, pulse width and
polarity of HCLAMP are S/W controllable.
6.8 VSYNC Interrupt
The MTV312M checks the VSYNC input pulse and generates an interrupt at its leading edge. The VSYNC
flag is set each time when MTV312M detects a VSYNC pulse. he flag is cleared by S/W writing a "0".
6.9 H/V SYNC Processor Register
Reg name
HVSTUS
HCNTH
HCNTL
VCNTH
VCNTL
HVCTR0
HVCTR2
HVCTR3
INTFLG
INTEN
addr
bit7
bit6
bit5
bit4
bit3
bit2
F40h(r)
CVpre
Hpol
Vpol
Hpre
Vpre
F41h(r)
Hovf
HF13
HF12
HF11
HF10
F42h(r)
HF7
HF6
HF5
HF4
HF3
HF2
F43h(r)
Vovf
VF11
VF10
F44h(r)
VF7
VF6
VF5
VF4
VF3
VF2
F40h(w)
C1
C0
NoHins SelExH IVHlfH
HlfHE
F42h(w)
Selft
STF1
STF0
Rt1
F43h(w)
CLPEG CLPPO CLPW2 CLPW1 CLPW0
F48h(r/w) HPRchg VPRchg HPLchg VPLchg HFchg
VFchg
F49h(w) EHPR
EVPR
EHPL
EVPL
EHF
EVF
bit1
Hoff
HF9
HF1
VF9
VF1
HBpl
Rt0
bit0
Voff
HF8
HF0
VF8
VF0
VBpl
Vsync
EVsync
HVSTUS (r) : The status of polarity, present and static level for HSYNC and VSYNC.
CVpre = 1
→ The extracted CVSYNC is present.
=0
→ The extracted CVSYNC is not present.
Hpol
=1
→ HSYNC input is positive polarity.
=0
→ HSYNC input is negative polarity.
Vpol
=1
→ VSYNC (CVSYNC) is positive polarity.
=0
→ VSYNC (CVSYNC) is negative polarity.
Hpre = 1
→ HSYNC input is present.
=0
→ HSYNC input is not present.
Vpre
=1
→ VSYNC input is present.
=0
→ VSYNC input is not present.
Hoff* = 1
→ Off level of HSYNC input is high.
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(Rev 0.99)
=0
→ Off level of HSYNC input is low.
=1
→ Off level of VSYNC input is high.
=0
→ Off level of VSYNC input is low.
*Hoff and Voff are valid when Hpre=0 or Vpre=0.
Voff*
HCNTH (r) :
H-Freq counter's high bits.
Hovf
=1
→ H-Freq counter is overflowed, this bit is cleared by H/W when condition removed.
HF13 - HF8 : 6 high bits of H-Freq counter.
HCNTL (r) :
H-Freq counter's low byte.
VCNTH (r) :
V-Freq counter's high bits.
Vovf
=1
→ V-Freq counter is overflowed, this bit is cleared by H/W when condition removed.
VF11 - 8 :
4 high bits of V-Freq counter.
VCNTL (r) :
V-Freq counter's low byte.
HVCTR0 (w) : H/V SYNC processor control register 0.
C1, C0 = 1,1 → Selects CVSYNC as the polarity, freq and VBLANK source.
= 1,0 → Selects VSYNC as the polarity, freq and VBLANK source.
= 0,0 → Disables composite function.
= 0,1 → H/W automatically switches to CVSYNC when CVpre=1 and VSpre=0.
NoHins = 1
→ HBLANK has no insert pulse in composite mode.
=0
→ HBLANK has insert pulse in composite mode.
SelExH = 1
→ Input source of HLFHO is HLFHI.
=0
→ Input source of HLFHO is HSYNC.
IVHlfH = 1
→ HLFHO is inverted.
=0
→ HLFHO is not inverted.
HlfHE = 1
→ HLFHO is half freq. of HSYNC/HLFHI.
=0
→ HLFHO is same freq. of HSYNC/HLFHI.
HBpl = 1
→ Negative polarity HBLANK output.
=0
→ Positive polarity HBLANK output.
VBpl = 1
→ Negative polarity VBLANK output.
=0
→ Positive polarity VBLANK output.
HVCTR2 (w) : Self-test pattern generator control.
Selft
=1
→ Enables generator.
=0
→ Disables generator.
STF1, STF0
= 1,1 → 95.2KHz (horizontal) / 72Hz (vertical) output selected.
= 1,0 → 63.5KHz (horizontal) / 60Hz (vertical) output selected.
= 0,1 → 47.6KHz (horizontal) / 60Hz (vertical) output selected.
= 0,0 → 31.75KHz (horizontal) / 60Hz (vertical) output selected.
Rt1,Rt0 = 0,0 → Positive cross-hatch pattern output.
= 0,1 → Negative cross-hatch pattern output.
= 1,0 → Full white pattern output.
= 1,1 → Full black pattern output.
HVCTR3 (w) : HSYNC clamp pulse control register.
CLPEG = 1
→ Clamp pulse follows HSYNC leading edge.
=0
→ Clamp pulse follows HSYNC trailing edge.
CLPPO = 1
→ Positive polarity clamp pulse output.
=0
→ Negative polarity clamp pulse output.
CLPW2 : CLPW0 : Pulse width of clamp pulse is
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MTV312M64
(Rev 0.99)
[(CLPW2:CLPW0) + 1] x 0.167 µs for 12MHz X’tal selection.
INTFLG (w) :
Interrupt flag. An interrupt event will set its individual flag, and, if the corresponding interrupt
enable bit is set, the INT1 source of 8051 core will be driven by a zero level. Software
MUST clear this register while serving the interrupt routine.
HPRchg= 1
→ No action.
=0
→ Clears HSYNC presence change flag.
VPRchg= 1
→ No action.
=0
→ Clears VSYNC presence change flag.
HPLchg= 1
→ No action.
=0
→ Clears HSYNC polarity change flag.
VPLchg = 1
→ No action.
=0
→ Clears VSYNC polarity change flag.
HFchg = 1
→ No action.
=0
→ Clears HSYNC frequency change flag.
VFchg = 1
→ No action.
=0
→ Clears VSYNC frequency change flag.
Vsync = 1
→ No action.
=0
→ Clears VSYNC interrupt flag.
INTFLG (r) :
Interrupt flag.
HPRchg= 1
→ Indicates a HSYNC presence change.
VPRchg= 1
→ Indicates a VSYNC presence change.
HPLchg= 1
→ Indicates a HSYNC polarity change.
VPLchg = 1
→ Indicates a VSYNC polarity change.
HFchg = 1
→ Indicates a HSYNC frequency change or counter overflow.
VFchg = 1
→ Indicates a VSYNC frequency change or counter overflow.
Vsync = 1
→ Indicates a VSYNC interrupt.
INTEN (w) :
Interrupt enable.
EHPR = 1
→ Enables HSYNC presence change interrupt.
EVPR = 1
→ Enables VSYNC presence change interrupt.
EHPL = 1
→ Enables HSYNC polarity change interrupt.
EVPL = 1
→ Enables VSYNC polarity change interrupt.
EHF
=1
→ Enables HSYNC frequency change / counter overflow interrupt.
EVF
=1
→ Enables VSYNC frequency change / counter overflow interrupt.
EVsync = 1
→ Enables VSYNC interrupt.
7. DDC & IIC Interface
7.1 DDC1/DDC2x Mode, DDCRAM and SlaveA block
The MTV312M enters DDC1 mode after Reset. In this mode, VSYNC is used as data clock. The HSCL pin
should remain at high. The data output to the HSDA pin is taken from a shift register in MTV312M. The shift
register automatically fetches EDID data from the lower 128 bytes of the Dual Port RAM (DDCRAM), then
sends it in 9-bit packet formats inclusive of a null bit (=1) as packet separator. S/W may enable/disable the
DDC1 function by setting/clearing the DDC1en control bit.
The MTV312M switches to DDC2x mode when it detects a high to low transition on the HSCL pin. In this
mode, the SlaveA IIC block automatically transmits/receives data to/from the IIC Master.
The
transmitted/received data is taken-from/saved-to the DDCRAM. In simple words, MTV312M can behaves as
24LC02 EEPROM. The only thing S/W needs to do is to write the EDID data to DDCRAM. The slave
address of SlaveA block can be chosen by S/W as 5-bit, 6-bit or 7-bit. For example, if S/W chooses 5-bit
slave address as 10100b, the SlaveA IIC block then responds to slave address 10100xxb. The SlaveA can
be enabled/disabled by setting/clearing the EnslvA bit. The lower/upper DDCRAM can/cannot be written by
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the IIC Master by setting/clearing the EN128w/En256w bit. Besides, if the Only128 control bit is set, the
SlaveA only accesses the lower 128 bytes of the DDCRAM.
The MTV312M returns to DDC1 mode if HSCL is kept high for 128 VSYNC clock period. However, it locks in
DDC2B mode if a valid IIC address (1010xxxb) has been detected on HSCL/HSDA bus. The DDC2 flag
reflects the current DDC status, S/W may clear it by writing a "0" to it.
7.2 SlaveB Block
The SlaveB IIC block is connected to HSDA and HSCL pins. This block can receive/transmit data using IIC
protocols. S/W may write the SLVBADR register to determine the slave addresses.
In receive mode, the block first detects IIC slave address matching the condition then issues a SlvBMI
interrupt. The data from HSDA is shifted into shift register then written to RCBBUF register when a data byte
is received. The first byte loaded is word address (slave address is dropped). This block also generates a
RCBI (receives buffer full interrupt) every time when the RCBBUF is loaded. If S/W is not able to read out
the RCBBUF in time, the next byte in shift register is not written to RCBBUF and the slave block returns
NACK to the master. This feature guarantees the data integrity of communication. The WadrB flag can tell
S/W whether the data in RCBBUF is a word address or not.
In transmit mode, the block first detects IIC slave address matching the condition, then issues a SlvBMI
interrupt. In the meantime, the data pre-stored in the TXBBUF is loaded into shift register, resulting in
TXBBUF emptying and generates a TXBI (transmit buffer empty interrupt). S/W should write the TXBBUF a
new byte for the next transfer before shift register empties. A failure of this process causes data corrupt.
The TXBI occurs every time when shift register reads out the data from TXBBUF.
The SlvBMI is cleared by writing "0" to corresponding bit in INTFLG register. The RCBI is cleared by reading
out RCBBUF. The TXBI is cleared by writing TXBBUF.
*Please refer to the attachments about "Slave IIC Block Timing".
7.3 Master Mode IIC Function Block
The master mode IIC block can be connected to the ISDA /ISCL pins or the HSDA/HSCL pins, selected by
Msel control bit. Its speed can be selected within the range of 50KHz-400KHz by S/W setting the
MIICF1/MIICF0 control bit. The software program can access the external IIC device through this interface.
A summary of master IIC access is illustrated as follows.
7.3.1. To write IIC Device
1. Write MBUF the Slave Address.
2. Set S bit to Start.
3. After the MTV312M transmits this byte, a MbufI interrupt is triggered.
4. Programs can write MBUF to transfer next byte or set P bit to stop.
* Please refer to the attachments about "Master IIC Transmit Timing".
7.3.2. To read IIC Device
1. Write MBUF the Slave Address.
2. Set S bit to Start.
3. After the MTV312M transmits this byte, a MbufI interrupt is triggered.
4. Set or reset the MAckO flag according to the IIC protocol.
5. Read out MBUF the useless byte to continue the data transfer.
6. After the MTV312M receives a new byte, the MbufI interrupt is triggered again.
7. Read MBUF also trigger the next receive operation, but set P bit before read can terminate the operation.
* Please refer to the attachments about "Master IIC Receive Timing".
Reg name
IICCTR
IICSTUS
INTFLG
INTFLG
Revision 0.99
addr
bit7
F00h (r/w) DDC2
F01h (r) WadrB
F03h (r)
TXBI
F03h (w)
bit6
RCBI
bit5
bit4
SlvRWB SAckIn
SlvBMI STOPI
SlvBMI STOPI
- 16 -
bit3
SLVS
ReStaI
ReStaI
bit2
MAckO
WSlvAI
WSlvAI
bit1
P
bit0
S
MAckIn
MbufI
MbufI
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INTEN
F04h (w)
MBUF
F05h (r/w)
DDCCTR
F06h (w)
SLVAADR F07h (w)
RCBBUF
F08h (r)
TXBBUF
F08h (w)
SLVBADR F09h (w)
MTV312M64
(Rev 0.99)
ETXBI
ERCBI ESlvBMI ESTOPI EReStaI EWSlvAI
EMbufI
Master IIC receive/transmit data buffer
DDC1en En128W En256W Only128
SlvAbs1 SlvAbs0
ENSlvA
Slave A IIC address
Slave B IIC receive buffer
Slave B IIC transmit buffer
ENSlvB
Slave B IIC address
IICCTR (r/w) : IIC interface control register.
MAckO = 1
→ In master receive mode, NACK is returned by MTV312M.
=0
→ In master receive mode, ACK is returned by MTV312M.
S, P
= ↑, 0 → Start condition when Master IIC is not during transfer.
= X, ↑ → Stop condition when Master IIC is not during transfer.
= 1, X → Resume transfer after a read/write MBUF operation.
IICSTUS (r) : IIC interface status register.
WadrB = 1
→ The data in RCBBUF is word address.
SlvRWB = 1
→ Current transfer is slave transmit
=0
→ Current transfer is slave receive
SAckIn = 1
→ The external IIC host respond NACK.
SLVS = 1
→ The slave block has detected a START, cleared when STOP detected.
MAckIn = 1
→ Master IIC bus error, no ACK received from the slave IIC device.
=0
→ ACK received from the slave IIC device.
INTFLG (w) :
Interrupt flag. A interrupt event will set its individual flag, and, if the corresponding interrupt
enable bit is set, the 8051 INT1 source will be driven by a zero level. Software MUST clear
this register while serving the interrupt routine.
SlvBMI = 1
→ No action.
=0
→ Clears SlvBMI flag.
STOPI = 1
→ No action.
=0
→ Clears STOPI flag.
ReStaI = 1
→ No action.
=0
→ Clears ReStaI flag.
WSlvAI = 1
→ No action.
=0
→ Clears WSlvAI flag.
MbufI = 1
→ No action.
=0
→ Clears Master IIC bus interrupt flag (MbufI).
INTFLG (r) :
TXBI
RCBI
Interrupt flag.
=1
→ Indicates the TXBBUF need a new data byte, cleared by writing TXBBUF.
=1
→ Indicates the RCBBUF has received a new data byte, cleared by reading
RCBBUF.
SlvBMI = 1
→ Indicates the slave IIC address B match condition.
STOPI = 1
→ Indicates the slave IIC has detected a STOP condition.
ReStaI = 1
→ Indicates the slave IIC has detected a repeat START condition.
WSlvAI = 1
→ Indicates the slave A IIC has detected a STOP condition of write mode.
MbufI = 1
→ Indicates a byte is sent/received to/from the master IIC bus.
INTEN (w) :
Interrupt enable.
ETXBI = 1
→ Enables TXBBUF interrupt.
ERCBI = 1
→ Enables RCBBUF interrupt.
ESlvBMI = 1
→ Enables slave address B match interrupt.
ESTOPI = 1
→ Enables IIC bus STOP interrupt.
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TECHNOLOGY
EReStaI = 1
EWSlvAI = 1
EMbufI = 1
MTV312M64
(Rev 0.99)
→ Enables IIC bus repeat START interrupt.
→ Enables slave A IIC bus STOP of write mode interrupt.
→ Enables Master IIC bus interrupt.
Mbuf (w) :
Master IIC data shift register, after START and before STOP condition, write this register
resumes MTV312M's transmission to the IIC bus.
Mbuf (r) :
Master IIC data shift register, after START and before STOP condition, read this register
resumes MTV312M's reception from the IIC bus.
DDCCTR (w) : DDC interface control register.
DDC1en = 1
→ Enables DDC1 data transfer in DDC1 mode.
=0
→ Disables DDC1 data transfer in DDC1 mode.
En128W = 1
→ The lower 128 bytes (00-7F) of DDCRAM can be written by IIC master.
=0
→ The lower 128 bytes (00-7F) of DDCRAM cannot be written by IIC master.
En256W = 1
→ The higher 128 bytes (80-FF) of DDCRAM can be written by IIC master.
=0
→ The higher 128 bytes (80-FF) of DDCRAM cannot be written by IIC master.
Only128 = 1
→ The SlaveA always accesses EDID data from the lower 128 bytes of DDCRAM.
=0
→ The SlaveA accesses EDID data from the whole 256 bytes DDCRAM.
SlvAbs1,SlvAbs0 : Slave IIC block A's slave address length.
= 1,0 → 5-bit slave address.
= 0,1 → 6-bit slave address.
= 0,0 → 7-bit slave address.
SLVAADR (w) : Slave IIC block A's enable and address.
ENslvA = 1
→ Enables slave IIC block A.
=0
→ Disables slave IIC block A.
bit6-0 :
Slave IIC address A to which the slave block should respond.
RCBBUF (r) :
Slave IIC block B receives data buffer.
TXBBUF (w) : Slave IIC block B transmits data buffer.
SLVBADR (w) : Slave IIC block B's enable and address.
ENslvB = 1
→ Enables slave IIC block B.
=0
→ Disables slave IIC block B.
bit6-0 :
Slave IIC address B to which the slave block should respond.
8. Low Power Reset (LVR) & Watchdog Timer
When the voltage level of power supply is below 3.8V(+/-0.2V) / 2.5V(+/-0.15V) in 5V / 3.3V applications for
a specific period of time, the LVR generates a chip reset signal. After the power supply is above 3.8V(+/0.2V) / 2.5V(+/-0.15V) in 5V / 3.3V applications, LVR maintains in reset state for 144 X'tal cycle to guarantee
the chip exit reset condition with a stable X'tal oscillation.
The Watchdog Timer automatically generates a device reset when it is overflowed. The interval of overflow
is 0.25 sec x N, where N is a number from 1 to 8, and can be programmed via register WDT(2:0). The timer
function is disabled after power on reset, users can activate this function by setting WEN, and clear the timer
by setting WCLR.
9. A/D converter
The MTV312M is equipped with four VDD range 6-bit A/D converters. So if the VDD = 5V/3.3V, and then the
Revision 0.99
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TECHNOLOGY
MTV312M64
(Rev 0.99)
ADC conversion range is 5V/3.3V, S/W can select the current convert channel by setting the SADC1/SADC0
bit. The refresh rate for the ADC is OSC freq./1536.
The ADC compares the input pin voltage with internal VDD*N/64 voltage (where N = 0 - 63). The ADC output
value is N when pin voltage is greater than VDD*N/64 and smaller than VDD*(N+1)/64.
Reg name
addr
bit7
bit6
bit5
bit4
bit3
bit2
bit1
ADC
F10h (w) ENADC
SADC3 SADC2 SADC1
ADC
F10h (r)
ADC convert result
WDT
F18h (w)
WEN
WCLR
WDT2
WDT1
WDT (w) :
Watchdog Timer control register.
WEN
=1
→ Enables Watchdog Timer.
WCLR
=1
→ Clears Watchdog Timer.
WDT2: WDT0 = 0
→ Overflow interval = 8 x 0.25 sec.
=1
→ Overflow interval = 1 x 0.25 sec.
=2
→ Overflow interval = 2 x 0.25 sec.
=3
→ Overflow interval = 3 x 0.25 sec.
=4
→ Overflow interval = 4 x 0.25 sec.
=5
→ Overflow interval = 5 x 0.25 sec.
=6
→ Overflow interval = 6 x 0.25 sec.
=7
→ Overflow interval = 7 x 0.25 sec.
ADC (w) :
ADC control.
ENADC
=1
SADC0
=1
SADC1
=1
SADC2
=1
SADC3
=1
ADC (r) :
bit0
SADC0
WDT0
→ Enables ADC.
→ Selects ADC0 pin input.
→ Selects ADC1 pin input.
→ Selects ADC2 pin input.
→ Selects ADC3 pin input.
ADC convert result.
10. In System Programming function (ISP)
The Flash memory can be programmed by a specific WRITER in parallel mode, or by IIC Host in serial mode
while the system is working. The features of ISP are outlined as below:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Single 3.3V power supply for Program/Erase/Verify.
Block Erase: 512 Byte, 10mS time
Whole Flash erase (Blank): 10mS
Byte/Word programming Cycle time: 60uS per byte
Read access time: 40ns
Only one two-pin IIC bus (shared with DDC2) is needed for ISP in user/factory mode.
IIC Bus clock rates up to 140KHz.
Whole 64K-byte Flash programming within 6 Sec.
CRC check provides 100% coverage for all single/double bit errors.
After Power On/Reset, The MTV312M runs the original Program Code. Once the S/W detects an ISP
request (by key or IIC), S/W can accept the request following the steps below:
1.
2.
3.
4.
5.
Clear watchdog to prevent reset during ISP period.
Disable all interrupt to prevent CPU wake-up.
Write IIC address of ISP slave to ISPSLV for communication.
Write 93h to ISP enable register (ISPEN) to enable ISP.
Enter 8051 idle mode.
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MTV312M64
(Rev 0.99)
When ISP is enabled, the MTV312M disables Watchdog reset and switches the Flash interface to ISP host
in 15-22.5uS. So S/W MUST enter idle mode immediately after enabling ISP. In the 8051 idle mode, PWM
DACs and I/O pins keep running at their former status. There are 4 types of IIC bus transfer protocols in ISP
mode.
Command Write
S-tttttt10k-cccccxxxk-AAAAAAAAk-P
Command Read
S-tttttt11k-cccccXXXK-AAAAAAAAK-aaaaaaaaK-RRRRRRRRK-rrrrrrrrK-P
Data Write
S-tttttt00k-aaaaaaaak-ddddddddk-ddddddddk- ... -P
Data Read
S-tttttt00k-aaaaaaaak-(P)S-tttttt01k-ddddddddK-ddddddddK- ... -P
where
S = start or re-start
P = stop
K = ack by host (0 or 1)
k = ack by slave
tttttt = ISP slave address
ccccc = command
x = don’t care
X = not defined
AAAAAAAA = address[15:8]
aaaaaaaa = address[7:0]
RRRRRRRR = CRC_register[15:8]
rrrrrrrr = CRC_register[7:0]
dddddddd = data
ccccc = 10100 → Program
ccccc = 00110 → Page Erase 512 bytes (Erase)
ccccc = 01101 → Erase entire Flash (Blank)
ccccc = 11010 → Clear CRC_register (Clr_CRC)
ccccc = 01001 → Reset MTV312M (Reset_CPU)
10.1 ISP Command Write
The 2nd byte of “Command Write” can define the operating mode of MTV312M in its “Data Write” stage,
clear CRC register, or reset MTV312M. The 3rd byte of Command Write defines the page address. A
Command Write may consist of 1,2 or 3 bytes.
10.2 ISP Command Read
The 2nd byte echoes the current command in ISP slave. The 3rd and 4th bytes reflect the current Flash
address. The 5th and 6th bytes report the CRC result. A Command Read may consist of 2,3,4,5 or 6 bytes.
10.3 ISP Data Write
The 2nd byte defines the low address of Flash. After receiving the 3rd byte, the MTV312M executes a
Program/Erase/Blank command depending on the preceding “Command Write”. The low address of Flash
increases every time when ISP slave acknowledges the data byte. The Blank/Erase command needs one
data byte (content is “don’t care”). The execution time is 10mS. During the 10mS period, the ISP slave does
not accept any command/data and returns non-ack to any IIC bus activity. The Program command may
have 1-256 data bytes. The program cycle time is 60us. If the ISP slave is not able to complete the program
cycle in time, it returns non-ack to the following data byte. In the meantime, the low address does not
increase and the CRC does not count the non-acked data byte. A Data Write may consist of 1,2 or more
bytes.
Data Write (Blank/Erase)
S-tttttt00k-aaaaaaaak-ddddddddk-P ... S-ttttttxxk|----Min. 10mS----|
Data Write (Program)
S-tttttt00k-aaaaaaaak-ddddddddk-ddddddddk- ...
|Min. 60uS|
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MTV312M64
(Rev 0.99)
10.4 ISP Data Read
The 1st and 2nd bytes are the same as “Data Write” to define the low address of Flash. Between 2nd and 3rd
bytes, the ISP host may issue Stop-Start or only Re-Start. From the 4th byte, the ISP slave sends the data
byte of Flash to ISP Host. The low address automatically increases every time when data byte is transferred.
10.5 Cyclic Redundancy Check (CRC)
To shorten the verify time, the ISP slave provides a simple way to check whether data error occurs during
the program data transfer. After the ISP Host sends a lot of data byte to ISP slave, Host can use Command
Read to check result of CRC register instead of reading every byte in Flash. The CRC register counts every
data byte which ISP slave acknowledges during “Data Write” period. However, the low address byte and the
data byte of Erase/Blank are not counted. The Clear CRC command will write all “1” to the 16-bit CRC
register. For CRC generation, the 16-bit CRC register is seeded with all “1” pattern (by device reset or Clear
CRC command). The data byte shifted into the CRC register is Msb first. The actual implementation is
described as follows:
CRCin = CRC[15]^DATAin;
CRC[15:0] = {CRC[14]^CRCin, CRC[13:2], CRC[1]^CRCin, CRC[0], CRCin};
Where ^ = XOR
example:
data_byte
F6H
28H
C3H
CRC_register_remainder
FFFFH
FF36H
34F2H
7031H
10.6 Reset Device
After the Flash been program completed and verified OK, the ISP Host can use “Command Write” with
Reset_CPU command to wake up MTV312M.
Reg name
ISPSLV
ISPEN
Revision 0.99
addr
F0Bh(w)
F0Ch(w)
bit7
bit6
bit5
bit4
bit3
bit2
ISP Slave address
Write 93h to enable ISP Mode
- 21 -
bit1
bit0
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(Rev 0.99)
Memory Map of XFR
Reg name
addr
IICCTR
F00h (r/w)
IICSTUS
F01h (r)
INTFLG
F03h (r)
INTFLG
F03h (w)
INTEN
F04h (w)
MBUF
F05h (r/w)
DDCCTR
F06h (w)
SLVAADR F07h (w)
RCBBUF
F08h (r)
TXBBUF
F08h (w)
SLVBADR F09h (w)
ISPSLV
F0Bh(w)
ISPEN
F0Ch(w)
ADC
F10h (w)
ADC
F10h (r)
WDT
F18h (w)
DA0
F20h(r/w)
DA1
F21h(r/w)
DA2
F22h(r/w)
DA3
F23h(r/w)
DA4
F24h(r/w)
DA5
F25h(r/w)
DA6
F26h(r/w)
DA7
F27h(r/w)
DA8
F28h(r/w)
DA9
F29h(r/w)
DA10
F2Ah(r/w)
DA11
F2Bh(r/w)
DA12
F2Ch(r/w)
DA13
F2Dh(r/w)
PORT5
F30h(r/w)
PORT5
F31h(r/w)
PORT5
F32h(r/w)
PORT5
F33h(r/w)
PORT5
F34h(r/w)
PORT5
F35h(r/w)
PORT5
F36h(r/w)
PORT6
F38h(r/w)
PORT6
F39h(r/w)
PORT6
F3Ah(r/w)
PORT6
F3Bh(r/w)
PORT6
F3Ch(r/w)
PORT6
F3Dh(r/w)
PORT6
F3Eh(r/w)
PORT6
F3Fh(r/w)
HVSTUS
F40h(r)
HCNTH
F41h(r)
HCNTL
F42h(r)
VCNTH
F43h(r)
Revision 0.99
bit7
DDC2
WadrB
TXBI
ETXBI
DDC1en
ENSlvA
ENSlvB
ENADC
WEN
CVpre
Hovf
HF7
Vovf
bit6
bit5
bit4
bit3
bit2
MAckO
bit1
P
bit0
S
MAckIn
MbufI
MbufI
EMbufI
SlvRWB SAckIn
SLVS
SlvBMI STOPI ReStaI WSlvAI
SlvBMI STOPI ReStaI WSlvAI
ERCBI ESlvBMI ESTOPI EReStaI EWSlvAI
Master IIC receives/transmits data buffer
En128W En256W Only128
SlvAbs1 SlvAbs0
Slave A IIC address
Slave B IIC receives buffer
Slave B IIC transmits buffer
Slave B IIC address
ISP Slave address
Write 93h to enable ISP Mode
SADC3 SADC2 SADC1 SADC0
ADC convert Result
WCLR
WDT2
WDT1
WDT0
Pulse width of PWM DAC 0
Pulse width of PWM DAC 1
Pulse width of PWM DAC 2
Pulse width of PWM DAC 3
Pulse width of PWM DAC 4
Pulse width of PWM DAC 5
Pulse width of PWM DAC 6
Pulse width of PWM DAC 7
Pulse width of PWM DAC 8
Pulse width of PWM DAC 9
Pulse width of PWM DAC 10
Pulse width of PWM DAC 11
Pulse width of PWM DAC 12
Pulse width of PWM DAC 13
P50
P51
P52
P53
P54
P55
P56
P60
P61
P62
P63
P64
P65
P66
P67
Hpol
Vpol
Hpre
Vpre
Hoff
Voff
HF13
HF12
HF11
HF10
HF9
HF8
HF6
HF5
HF4
HF3
HF2
HF1
HF0
VF11
VF10
VF9
VF8
RCBI
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VCNTL
HVCTR0
HVCTR2
HVCTR3
INTFLG
INTEN
PADMOD
PADMOD
PADMOD
PADMOD
PADMOD
PADMOD
OPTION
PORT4
PORT4
PORT4
Revision 0.99
F44h(r)
VF7
VF6
F40h(w)
C1
C0
F42h(w)
F43h(w)
CLPEG
F48h(r/w) HPRchg VPRchg
F49h(w) EHPR
EVPR
F50h(w) DA13E DA12E
F51h(w)
P56E
F52h(w)
HIICE
IIICE
F53h(w)
P56oe
F54h(w) P67oe
P66oe
F55h(w) COP17 COP16
F56h(w) PWMF DIV253
F58h(w)
F59h(w)
F5Ah(w)
MTV312M64
VF5
VF4
VF3
VF2
NoHins
HlfHE
IVHlfH
Selft
STF1
STF0
Rt1
CLPPO CLPW2 CLPW1 CLPW0
HPLchg VPLchg HFchg
VFchg
EHPL
EVPL
EHF
EVF
DA11E DA10E
AD3E
AD2E
P55E
P54E
P53E
P52E
HLFVE HLFHE HCLPE
P42E
P55oe
P54oe
P53oe
P52oe
P65oe
P64oe
P63oe
P62oe
COP15 COP14 COP13 COP12
FclkE
ENSCL
Msel
- 23 -
(Rev 0.99)
VF1
HBpl
Rt0
AD1E
P51E
P41E
P51oe
P61oe
COP11
MIICF1
VF0
VBpl
Vsync
EVsync
AD0E
P50E
P40E
P50oe
P60oe
COP10
MIICF0
P40
P41
P42
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(Rev 0.99)
ELECTRICAL PARAMETERS
1. Absolute Maximum Ratings
at: Ta= 0 to 70 oC, VSS=0V
Name
Maximum Supply Voltage
Maximum Input Voltage
(HSYNC, VSYNC & open-drain pins)
Maximum Input Voltage (other pins)
Maximum Output Voltage
Maximum Operating Temperature
Maximum Storage Temperature
Symbol
VDD
Range
-0.3 to +6.0
Unit
V
Vin1
-0.3 to 5V+0.3
V
Vin2
Vout
Topg
-0.3 to VDD+0.3
-0.3 to VDD+0.3
0 to +70
V
V
oC
Tstg
-25 to +125
oC
2. Allowable Operating Conditions
at: Ta= 0 to 70 oC, VSS=0V
Name
Symbol
Supply Voltage
VDD
Input "H" Voltage
Input "L" Voltage
Operating Freq.
Vih1
Vil1
Fopg
Condition
5V applications
3.3V applications
Min.
4.5
3.0
0.7 x VDD
-0.3
-
Max.
5.5
3.6
VDD +0.3
0.25 x VDD
15
Unit
V
V
V
V
MHz
3. DC Characteristics
at: Ta=0 to 70 oC, VDD=5.0V/3.3V, VSS=0V
Name
Symbol
Voh1
Output "H" Voltage, open drain pin
Voh2
Voh3
Output "H" Voltage, 8051 I/O port pin
Voh4
Voh5
Output "H" Voltage, CMOS output
Voh6
Output "L" Voltage
Vol
Power Supply Current
Idd
RST Pull-Down Resistor
Pin Capacitance
Rrst
Cio
Revision 0.99
Condition
VDD=5V, Ioh=0uA
VDD=3.3V, Ioh=0uA
VDD=5V, Ioh=-50uA
VDD=3.3V, Ioh=-50uA
VDD=5V, Ioh=-4mA
VDD=3.3V, Ioh=-4mA
Iol=5mA
Active
Idle
Power-Down
VDD=5V
- 24 -
Min.
4
2.65
4
2.65
4
2.65
Typ.
18
1.3
50
150
Max.
0.45
24
4.0
80
250
15
Unit
V
V
V
V
V
V
V
mA
mA
uA
Kohm
pF
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MYSON
TECHNOLOGY
(Rev 0.99)
4. AC Characteristics
at: Ta=0 to 70 oC, VDD=5.0V/3.3V, VSS=0V
Name
Symbol
Crystal Frequency
fXtal
PWM DAC Frequency
fDA
HS input pulse Width
tHIPW
VS input pulse Width
tVIPW
HSYNC to Hblank output jitter
tHHBJ
H+V to Vblank output delay
tVVBD
VS pulse width in H+V signal
tVCPW
Condition
fXtal=12MHz
fXtal=12MHz
fXtal=12MHz
Min.
Typ.
12
46.875
0.3
3
Max.
94.86
7.5
5
fXtal=12MHz
FXtal=12MHz
8
20
Unit
MHz
KHz
uS
uS
nS
uS
uS
Test Mode Condition
In normal application, users should avoid the MTV312M entering its test mode or writer mode, outlined as
follows, adding pull-up resistor to DA8 and DA9 pins is recommended.
Test Mode A: RESET=1 & DA9=1 & DA8=0 & STO=0
Test Mode B: RESET's falling edge & DA9=1 & DA8=0 & STO=1
Writer Mode: RESET=1 & DA9=0 & DA8=1
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TECHNOLOGY
(Rev 0.99)
PACKAGE DIMENSION
1. 40-pin PDIP 600 mil
52.197mm +/-0.127
1.981mm
+/-0.254
1.270mm +/-0.254
0.457mm +/-0.127
2.540mm
15.494mm +/-0.254
13.868mm +/-0.102
0.254mm
+/-0.102
1.778mm
+/-0.127
3.81mm
+/-0.127
0.254mm
(min.)
3.302mm
+/-0.254
5o~70
6o +/-3o
16.256mm +/-0.508
2. 42 pin SDIP Unit: mm
Symbol
A
A1
B1
D
E1
F
eB
θ
Dimension in mm
Min
Nom
Max
3.937 4.064
4.2
1.78
1.842
1.88
0.914 1.270 1.118
36.78 36.83 36.88
13.945 13.970 13.995
15.19 15.240 15.29
15.24 16.510 17.78
0°
7.5°
15°
15.494mm +/0.254
13.868mm +/0.102
0.254m
m
+/-0.102
o
5 ~7
0
6
o
+/o
16.256mm +/0.508
3
Revision 0.99
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TECHNOLOGY
(Rev 0.99)
3. 44 pin PLCC Unit:
PIN #1 HOLE
0.045*450
0.180 MAX.
0.020 MIN.
0.013~0.021 TYP.
0.690 +/-0.005
0.610 +/-0.02
0.653 +/-0.003
0.500
70TYP.
0.010
0.050 TYP.
0.026~0.032 TYP.
0.070
0.070
0.653 +/-0.003
0.690 +/-0.005
Ordering Information
Standard Configurations:
Prefix
Part Type
MTV
312M
Package Type
N: PDIP
S: SDIP
V: PLCC
ROM Size (K)
Package Type
N
S
V
ROM Size (K)
64
64
64
64
Part Numbers:
Prefix
MTV
MTV
MTV
Revision 0.99
Part Type
312M
312M
312M
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2001/07/26