EMC EM78P173N

EM78P173N
8-Bit Microcontroller
with OTP ROM
Product
Specification
DOC. VERSION 1.0
ELAN MICROELECTRONICS CORP.
April 2010
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are trademarks of ELAN Microelectronics Corporation.
Copyright © 2010 by ELAN Microelectronics Corporation
All Rights Reserved
Printed in Taiwan
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Contents
Contents
1
General Description .................................................................................................. 1
2
Features ..................................................................................................................... 1
3
Pin Assignment ......................................................................................................... 2
4
Pin Description.......................................................................................................... 3
4.1
EM78P173N-14PIN............................................................................................ 3
4.2
EM78P173N-10PIN............................................................................................ 4
5
Block Diagram ........................................................................................................... 5
6
Functional Description ............................................................................................. 6
6.1
Operational Registers......................................................................................... 6
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.1.10
6.1.11
6.1.12
6.1.13
6.2
R0 (Indirect Addressing Register) .......................................................................6
R1 (Timer Clock/Counter) ...................................................................................6
R2 (Program Counter and Stack)........................................................................6
R3 (Status Register) ............................................................................................8
R4 (RAM Select Register)...................................................................................8
R5 ~ R6 (Port 5 ~ Port 6) ....................................................................................8
Bank 0 RE (LVD Control Register)......................................................................9
Bank 0 RF (Interrupt Status Register) .................................................................9
Bank 1 R5 (TBHP: Table Point Register for Instruction TBRD) ........................10
Bank 1 R6 (TBLP: Table Point Register for Instruction TBRD) .........................10
Bank 1 RE (LVD Interrupt and Wake-up Register)............................................10
Bank 1 RF (System Control Register)...............................................................11
R10 ~ R3F .........................................................................................................14
Special Function Registers............................................................................... 15
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
A (Accumulator).................................................................................................15
CONT (Control Register)...................................................................................15
IOC5 ~ IOC6 (I/O Port Control Register) ..........................................................16
IOCB (Pull-down Control Register) ...................................................................16
IOCC (Open-drain Control Register).................................................................16
IOCD (Pull-high Control Register).....................................................................17
IOCE (WDT Control Register) ...........................................................................17
IOCF (Interrupt Mask Register).........................................................................18
6.3
TCC/WDT and Prescaler.................................................................................. 18
6.4
I/O Ports ........................................................................................................... 19
6.5
Reset and Wake-up.......................................................................................... 22
6.5.1
6.5.2
6.5.3
6.5.4
6.6
Reset .................................................................................................................22
Wake-up and Interrupt Modes Operation Summary .........................................24
Summary of Registers Initialized Values...........................................................25
Status of RST, T, and P of the Status Register..................................................27
Interrupt ............................................................................................................ 29
Product Specification (V1.0) 04.20.2010
• iii
Contents
6.7
Oscillator .......................................................................................................... 30
6.7.1
6.7.2
6.7.3
6.7.4
6.8
Code Option Register....................................................................................... 35
6.8.1
6.9
Oscillator Modes................................................................................................30
Crystal Oscillator/Ceramic Resonators (Crystal)...............................................31
External RC Oscillator Mode.............................................................................33
Internal RC Oscillator Mode ..............................................................................34
Code Option Register (Word 0).........................................................................35
Power-on Considerations ................................................................................. 38
6.10 Programmable Oscillator WDT Time-out Period .............................................. 38
6.11 External Power-on Reset Circuits..................................................................... 39
6.12 Residue-Voltage Protection .............................................................................. 39
6.13 Low Voltage Detector ....................................................................................... 41
6.13.1 Low Voltage Reset (LVR) ..................................................................................41
6.13.2 Low Voltage Detector (LVD) ..............................................................................41
6.13.2.1 Bank 0 RE (LVD Control Register).....................................................41
6.13.2.2 Bank 1 RE (LVD Interrupt and Wake-up Register).............................42
6.13.3 Programming Process.......................................................................................43
6.14 Instruction Set .................................................................................................. 44
7
Absolute Maximum Ratings ................................................................................... 47
8
Electrical Characteristics ....................................................................................... 47
9
8.1
DC Characteristics ........................................................................................... 47
8.2
AC Characteristics............................................................................................ 49
Timing Diagrams ..................................................................................................... 50
APPENDIX
A
Package Type........................................................................................................... 51
B
Package Information............................................................................................... 52
Specification Revision History
Doc. Version
iv •
Revision Description
Date
0.9
Preliminary version
2010/03/24
1.0
Initial version
2010/04/20
Product Specification (V1.0) 04.20.2010
EM78P173N
8-Bit Microcontroller with OTP ROM
1
General Description
The EM78P173N is an 8-bit microprocessor designed and developed with low-power and high-speed
CMOS technology. It has an on-chip 1K×13-bit Electrical One Time Programmable Read Only
Memory (OTP-ROM). This device provides a protection bit to prevent intrusion of user’s OTP memory
code. Three Code option words are also available to meet user’s requirements.
With its enhanced OTP-ROM features, the EM78P173N provides a convenient way of developing and
verifying user’s programs. Moreover, this OTP device offers the advantages of easy and effective
program updates, using development and programming tools. Users can avail of the ELAN Writer to
easily program their development code.
2
Features
„
• IRC mode:
CPU configuration
• 1K×13 bits on-chip ROM
Drift Rate
• 48×8 bits on-chip registers (SRAM,
General purpose)
Internal RC
Frequency Temperature
• 5-level stacks for subroutine nesting
• 4 programmable level voltage detector
LVD : 4.5, 4.0, 3.3, 2.2V
• 3 programmable level voltage reset
LVR : 4.0, 3.5, 2.7V
• Less than 1.5mA at 5V/4MHz
• Typically 15 µA, at 3V/32kHz
„
• Typically 1 µA, during Sleep mode
„
• 2 bidirectional I/O ports : P5, P6
• 12 I/O pins
• Wake-up port : P6
• 7 Programmable pull-down I/O pins
• 7 programmable pull-high I/O pins
DC~2 MHz/2clks @ 2.1V
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
± 7%
16 MHz
± 2%
± 3%
± 2%
± 7%
8 MHz
± 2%
± 3%
± 2%
± 7%
1 MHz
± 2%
± 3%
± 2%
± 7%
Peripheral configuration
Package type:
• 14-pin DIP 300mil : EM78P173ND14J/S
• 14-pin SOP 150mil : EM78P173NSO14J/S
• 10-pin MSOP 118mil : EM78P173NMS10J/S
DC~20MHz/2clks @ 5V
• ERC mode:
± 2%
„
• Crystal mode:
DC~4MHz/2clks @ 2.1V
± 3%
Special features
• Programmable free running watchdog timer
• Power-on voltage detector available
(1.8~1.9V)
• 2.3V~5.5V at -40~85°C (Industrial)
DC~8MHz/2clks @ 3V
± 2%
„
Operating voltage range:
Operating frequency range (base on 2 clocks):
4 MHz
Four available interrupts:
• TCC overflow interrupt
• Input-port status changed interrupt
• External interrupt
• Low voltage detect interrupt
• 2.1V~5.5V at 0~70°C (Commercial)
„
Total
„
• External interrupt with wake-up: P60
„
Process
• 8-bit real time clock/counter (TCC) with
selective signal sources, trigger edges, and
overflow interrupt
• External interrupt input pin
• 2/4 clocks per instruction cycle selected by
code option
• Power down (Sleep) mode
• High EFT immunity
I/O port configuration
• 7 programmable open-drain I/O pins
Voltage
(-40°C~85°C) (2.1V~5.5V)
Note: These are all Green products which do not
contain hazardous substances.
•1
EM78P173N
8-Bit Microcontroller with OTP ROM
3
Pin Assignment
(1)
14-Pin DIP/SOP
Figure 3-1 14-pin EM78P173N
(2)
10-Pin MSOP
Figure 3-2 10-pin EM78P173N
2•
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
4
Pin Description
4.1 EM78P173N-14PIN
Function
Input
Type
Output
Type
P50~P52
P50~P52
ST
CMOS
Bidirectional I/O pin with programmable
pull-down.
P53
P53
ST
CMOS
Bidirectional I/O pin
P60
ST
CMOS
Bidirectional I/O pin with programmable
pull-down, open-drain, pull-high and pin
change wake-up.
/INT
ST
−
P61
ST
CMOS
P62
ST
CMOS
TCC
ST
−
P63
ST
CMOS
/RESET
ST
−
P64
ST
CMOS
Bidirectional I/O pin with programmable
open-drain, pull-high and pin change
wake-up.
−
XTAL
Clock output of crystal/ resonator oscillator
−
CMOS
ST
CMOS
OSCI
XTAL
−
Clock input of crystal/resonator oscillator
ERCin
AN
−
External RC input pin
P66~P67
P66~P67
ST
CMOS
VDD
VDD
Power
−
Power
VSS
VSS
Power
−
Ground
Name
P60//INT
P61
P62/TCC
P63//RESET
P64/OSCO/RCOUT OSCO
RCOUT
P65
P65/OSCI/ERCin
Description
External interrupt pin
Bidirectional I/O pin with programmable
pull-down, open-drain, pull-high and pin
change wake-up.
Bidirectional I/O pin with programmable
pull-down, open-drain, pull-high and pin
change wake-up.
Real Time Clock/Counter clock input
Bidirectional I/O pin with programmable
pull-down and pin change wake-up.
Internal pull-high reset pin
Clock output of internal RC oscillator
Clock output of external RC oscillator
(open-drain)
Bidirectional I/O pin with programmable
open-drain, pull-high and pin change
wake-up.
Bidirectional I/O pin with programmable
open-drain, pull-high and pin change
wake-up.
Legend: ST: Schmitt Trigger input, AN: analog pin, CMOS: CMOS output,
XTAL: oscillation pin for crystal/ resonator
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
•3
EM78P173N
8-Bit Microcontroller with OTP ROM
4.2 EM78P173N-10PIN
Name
P60//INT
P61
P62/TCC
P63//RESET
Input
Type
Output
Type
P60
ST
CMOS
/INT
ST
−
P61
ST
CMOS
P62
ST
CMOS
TCC
ST
−
P63
ST
CMOS
/RESET
ST
−
P64
ST
CMOS
−
XTAL
Function
P64/OSCO/RCOUT OSCO
Description
Bidirectional I/O pin with programmable
pull-down, open-drain, pull-high and pin
change wake-up.
External interrupt pin
Bidirectional I/O pin with programmable
pull-down, open-drain, pull-high and pin
change wake-up.
Bidirectional I/O pin with programmable
pull-down, open-drain, pull-high and pin
change wake-up.
Real Time Clock/Counter clock input
Bidirectional I/O pin with programmable
pull-down and pin change wake-up.
Internal pull-high reset pin
Bidirectional I/O pin with programmable
open-drain, pull-high and pin change
wake-up.
Clock output of crystal/ resonator oscillator
Clock output of internal RC oscillator
Clock output of external RC oscillator
(open-drain)
Bidirectional I/O pin with programmable
open-drain, pull-high and pin change
wake-up.
−
CMOS
ST
CMOS
OSCI
XTAL
−
Clock input of crystal/resonator oscillator
ERCin
AN
−
External RC input pin
P66~P67
P66~P67
ST
CMOS
VDD
VDD
Power
−
Power
VSS
VSS
Power
−
Ground
RCOUT
P65
P65/OSCI/ERCin
Bidirectional I/O pin with programmable
open-drain, pull-high and pin change
wake-up.
Legend: ST: Schmitt Trigger input, AN: analog pin, CMOS: CMOS output,
XTAL: oscillation pin for crystal/ resonator
4•
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
5
Block Diagram
Figure 5-1 EM78P173N Functional Block Diagram
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
•5
EM78P173N
8-Bit Microcontroller with OTP ROM
6
Functional Description
6.1 Operational Registers
6.1.1 R0 (Indirect Addressing Register)
R0 is not a physically implemented register. It is used as an indirect addressing pointer.
Any instruction using R0 as a pointer actually accesses data pointed by the RAM Select
Register (R4).
6.1.2 R1 (Timer Clock/Counter)
„
Incremented by an external signal edge, which is defined by TE bit (CONT-4)
through the TCC pin, or by the instruction cycle clock.
„
Writable and readable as any other registers.
„
Defined by resetting PAB (CONT-3).
„
The prescaler is assigned to TCC, if the PAB bit (CONT-3) is reset.
„
The contents of the prescaler counter will be cleared only when the TCC register is
written with a value.
6.1.3 R2 (Program Counter and Stack)
„
Depending on the device type, R2 and hardware stack are 10-bit wide. The
structure is depicted in the following figure.
PC (A9 ~ A0)
000H
008H
User Memory Space
Stack Level 1
Stack Level 2
Stack Level 3
Stack Level 4
Stack Level 5
Reset Vector
Interrupt Vector
On-chip Program
Memory
3FFH
Figure 6-1 Program Counter Organization
6•
„
When ICE300N tries to simulate the stack of EM78P173N, and when the simulated
stacks exceed 5 levels, the simulated result will be inconsistent with the
EM78P173N.
„
The configuration structure generates 1024×13 bits on-chip OTP ROM addresses
to the relative programming instruction codes. One program page is 1024 words
long.
„
R2 is set as all "0" when under Reset condition.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
„
"JMP" instruction allows direct loading of the lower 10 program counter bits. Thus,
"JMP" allows the PC to go to any location within a page.
„
"CALL" instruction loads the lower 10 bits of the PC, and then PC+1 are pushed
onto the stack. Thus, the subroutine entry address can be located anywhere within
a page.
„
"RET" ("RETLk", "RETI") instruction loads the program counter with the contents of
the top-level stack.
„
"ADD R2, A" allows a relative address to be added to the current PC, and the ninth
and tenth bits of the PC will increase progressively.
„
"MOV R2, A" allows loading of an address from the "A" register to the lower 8 bits of
the PC, and the ninth and tenth bits (A8 ~ A9) of the PC will remain unchanged.
Any instruction (except “ADD R2,A”) that is written to R2 (e.g., "MOV R2, A", "BC R2, 6"
etc.) will cause the ninth bit and above bits of the PC to remain unchanged.
„
All instructions are single instruction cycle (fclk/2 or fclk/4) except for instructions
that would change the contents of R2. Such instructions will need one more
instruction cycle.
Figure 6-2 Data Memory Configuration
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
•7
EM78P173N
8-Bit Microcontroller with OTP ROM
6.1.4 R3 (Status Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RST
GP1
GP0
T
P
Z
DC
C
Bit 7 (RST): Bit for reset type
0 : Set to 0 if the device wakes up from other reset type
1 : Set to 1 if the device wakes up from sleep mode on a pin change,
external interrupt or low voltage detector interrupt.
Bits 6 ~ 5 (GP1 ~ GP0): General-purpose read/write bits
Bit 4 (T): Time-out bit
Set to “1” with the "SLEP" and "WDTC" commands, or during power up;
and reset to “0” by WDT time-out.
Bit 3 (P): Power down bit
Set to “1” during power on or by a "WDTC" command; and reset to “0” by
a "SLEP" command.
Bit 2 (Z): Zero flag
Set to "1" if the result of an arithmetic or logic operation is zero.
Bit 1 (DC): Auxiliary carry flag
Bit 0 (C): Carry flag
6.1.5 R4 (RAM Select Register)
Bit 7: General-purpose read/write bits
Bit 6: Used to select Banks 0~1
See the Data Memory Configuration in Figure 6-2.
6.1.6 R5 ~ R6 (Port 5 ~ Port 6)
R5 and R6 are I/O registers.
Only the lower 4 bits of R5 are available.
The upper 4 bits of R5 can be R/W.
8•
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.1.7 Bank 0 RE (LVD Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
/LVD
LVDIF
-
-
-
-
-
LVDWE
Bit 7 (/LVD): Low voltage Detector state.
When the VDD pin voltage is lower than LVD voltage interrupt level
(selected by LVD1 and LVD0), this bit will be cleared.
0: Low voltage is detected
1: Low voltage is not detected or LVD function is disabled
Bit 6 (LVDIF): LVD Interrupt Flag bit.
0: No interrupt occurs
1: With interrupt request
Bits 5 ~ 1: Not used. Set to “0” at all time.
Bit 0 (LVDWE): Low Voltage Detect wake-up.
0: Disable Low Voltage Detect wake-up
1: Enable Low Voltage Detect wake-up
6.1.8 Bank 0 RF (Interrupt Status Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
-
-
-
-
-
EXIF
ICIF
TCIF
NOTE
“ 1 ” means with interrupt request
“ 0 ” means no interrupt occurs
Bits 7 ~ 3: Not used. Set to “0” at all time.
Bit 2 (EXIF): External Interrupt Flag. Set by a falling edge on the /INT pin, reset by
software.
Bit 1 (ICIF): Port 6 input status changed interrupt flag. Set when Port 6 input changes,
reset by software.
Bit 0 (TCIF): TCC Overflow Interrupt Flag. Set when TCC overflows, reset by
software.
RF can be cleared by instruction but cannot be set.
IOCF is the interrupt mask register.
NOTE
The result of reading RF is the "logic AND" of RF and IOCF.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
•9
EM78P173N
8-Bit Microcontroller with OTP ROM
6.1.9 Bank 1 R5 (TBHP: Table Point Register for Instruction TBRD)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
MLB
-
-
-
-
-
RBit9
RBit8
Bit 7 (MLB): Chooses the MSB or LSB machine code to move into the register.
The machine code is pointed by TBLP and TBHP register.
Bits 6 ~ 2: Not used. Set to “0” at all time.
Bits 1 ~ 0: These are the most 2 significant bits of address for program code
6.1.10
Bank 1 R6 (TBLP: Table Point Register for Instruction TBRD)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RBit7
RBit6
RBit5
RBit4
RBit3
RBit2
RBit1
RBit0
Bits 7 ~ 0: These are the least 8 significant bits of address for program code.
6.1.11 Bank 1 RE (LVD Interrupt and Wake-up Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LVDIE
LVDEN
LVD1
LVD0
-
-
-
EXWE
Bit 7 (LVDIE): Low voltage detector interrupt enable bit
0: Disable the low voltage detector interrupt
1: Enable the low voltage detector interrupt
Bit 6 (LVDEN): Low voltage detector enable bit
0: Disable Low voltage detector function
1: Enable Low voltage detector function
Bits 5 ~ 4: Low voltage detector level bits
LVDEN
LVD1, LVD0
1
11
1
10
1
01
1
00
0
××
LVD Voltage Interrupt Level
/LVD
Vdd ≤ 2.2V
0
Vdd > 2.2V
1
Vdd ≤ 3.3V
0
Vdd > 3.3V
1
Vdd ≤ 4.0V
0
Vdd > 4.0V
1
Vdd ≤ 4.5V
0
Vdd > 4.5V
1
N/A
1
NOTE
IF Vdd has crossover at LVD voltage in interrupt level as VDD varies, LVD interrupt
will occur.
10 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Bits 3 ~ 1: Not used. Set to “0” at all time.
Bit 0 (EXWE): External /INT wake-up enable bit
0: Disable External /INT pin wake-up
1: Enable External /INT pin wake-up
6.1.12 Bank 1 RF (System Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
-
TIMERSC
CPUS
IDLE
-
-
RCM1
RCM0
Bits 7, 3 ~ 2: not used, fixed to "0" at all time.
Bit 6 (TIMERSC): TCC clock source select
0 : Fs is used as Fc
1 : Fm is used as Fm/2 or Fm/4 (default)
Bit 5 (CPUS): CPU Oscillator Source Select
0 : Fs : sub frequency for WDT internal RC time base 16kHz
1 : Fm : Main oscillator (Fm) (default)
When CPUS=0, the CPU oscillator selects the sub-oscillator and the
main oscillator is stopped.
Bit 4 (IDLE): Idle Mode Enable Bit
From SLEP instruction, this bit will determine as to which mode to
choose.
0 : IDLE = ‘0’ + SLEP instruction → sleep mode (default)
1 : IDLE = ‘1’ + SLEP instruction → idle mode
Figure 6-3 CPU Operation Mode Diagram
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 11
EM78P173N
8-Bit Microcontroller with OTP ROM
Oscillator
(Normal Mode
Source)
Crystal
1M ~ 20 MHz
Oscillator
Stable Time
CPU Mode Status
(S)
Sleep/Idle → Normal
Green → Normal
2 MHz
IRC
1M, 4M, 8M,
16 MHz
1
0.5 ms ~ 2 ms
Sleep/Idle → Green
ERC
Count from
Normal/Green
< 100 µs
Sleep/Idle → Normal
< 5 µs
Green → Normal
Sleep/Idle → Green
(CLK)
2
510 CLK
510 CLK
8 CLK
8 CLK
< 100 µs
Sleep/Idle → Normal
< 2 µs
Green → Normal
Sleep/Idle → Green
8 CLK
< 100 µs
NOTE
1
■ The oscillator stable time depends on the oscillator characteristics.
2
■ After the oscillator has stabilized, the CPU will count 510/8 CLK in Normal/Green
mode and continue to work in Normal/Green mode.
Ex 1 : The 4 MHz IRC wakes-up from Sleep mode to Normal mode,
the total wake-up time is 2 µs + 8 CLK @ 4 MHz.
Ex 2 : The 4 MHz IRC wakes-up from Sleep mode to Green mode,
the total wake-up time is 100 µs + 8 CLK @ 16kHz.
Bits 1 ~ 0 (RCM1 ~ RCM0): IRC mode select bits.
12 •
RCM 1
RCM 0
Frequency (MHz)
1
1
4
1
0
16
0
1
8
0
0
1
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Bank 1 RF<1, 0> will be enabled.
Writer Trim IRC
Bank 1 RF<1, 0>
Frequency
Operating Voltage
Stable Time
Range
RCM1
RCM0
1
1
4 MHz ± 2%
2.1V ~ 5.5V
< 5 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1 MHz ± 10%
2.1V ~ 5.5V
< 24 µs
1
1
4 MHz ± 10%
2.1V ~ 5.5V
< 6 µs
1
0
16 MHz ± 2%
4.5V ~ 5.5V
< 1.25 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1 MHz ± 10%
2.1V ~ 5.5V
< 24 µs
1
1
4 MHz ± 10%
2.1V ~ 5.5V
< 6 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 2%
3.0V ~ 5.5V
< 2.5 µs
0
0
1 MHz ± 10%
2.1V ~ 5.5V
< 24 µs
1
1
4 MHz ± 10%
2.1V ~ 5.5V
< 6 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1 MHz ± 2%
2.1V ~ 5.5V
< 20 µs
4 MHz
16 MHz
8 MHz
1 MHz
NOTE
„
„
The initial values of Bank1 RF<1,0> will be kept the same as Word 1<6,5>.
If user changes the IRC frequency from A-frequency to B-frequency, the
MCU needs to wait for some time for it to work. The waiting time corresponds
to the B-frequency.
For Example:
1st step When user selects the 4 MHz at the Writer, the initial values of Bank 1 RF<1,0>
would be “11”, the same as the value of Word 1<6,5> which is “11”.
If the MCU is free-running, it will work at 4 MHz ± 2%. Refer to the table below.
Writer Trim IRC
Bank 1 RF<1, 0>
Frequency
Operating Voltage
Stable Time
Range
RCM1
RCM0
1
1
4 MHz ± 2%
2.1V ~ 5.5V
< 5 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1MHz ± 10%
2.1V ~ 5.5V
< 24 µs
4 MHz
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 13
EM78P173N
8-Bit Microcontroller with OTP ROM
2nd step If it is desired to set Bank 1 RF<1,0> = “10” while the MCU is working at
4 MHz ± 2%, the MCU needs to hold for 1.5 µs, then it will continue to work at
16 MHz ± 10%.
Writer Trim IRC
4 MHz
Bank 1 RF<1, 0>
Frequency
Operating Voltage
Stable Time
Range
RCM1
RCM0
1
1
4 MHz ± 2%
2.1V ~ 5.5V
< 5 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1 MHz ± 10%
2.1V ~ 5.5V
< 24 µs
3rd step If it is desired to set Bank 1 RF<1,0> = “00” while the MCU is working at
16 MHz ± 10%, the MCU needs to hold for 24 µs, then it will continue to work at
1 MHz ± 10%.
Bank 1 RF<1, 0>
Writer Trim IRC
4 MHz
Frequency
Operating Voltage
Stable Time
Range
RCM1
RCM0
1
1
4 MHz ± 2%
2.1V ~ 5.5V
< 5 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1 MHz ± 10%
2.1V ~ 5.5V
< 24 µs
4th step If it is desired to set Bank 1 RF<1,0> = “11” while the MCU is working at
1 MHz ± 10%, the MCU needs to hold for 5 µs, then it will continue to work at
4 MHz ± 2%.
Writer Trim IRC
4 MHz
Bank 1 RF<1, 0>
Frequency
Operating Voltage
Stable Time
Range
RCM1
RCM0
1
1
4 MHz ± 2%
2.1V ~ 5.5V
< 5 µs
1
0
16 MHz ± 10%
4.5V ~ 5.5V
< 1.5 µs
0
1
8 MHz ± 10%
3.0V ~ 5.5V
< 3 µs
0
0
1 MHz ± 10%
2.1V ~ 5.5V
< 24 µs
6.1.13 R10 ~ R3F
These are all 8-bit general-purpose registers.
14 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.2 Special Function Registers
6.2.1 A (Accumulator)
Internal data transfer operation, or instruction operand holding usually involves the
temporary storage function of the Accumulator, which is not an addressable register.
6.2.2 CONT (Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
GP
INT
TS
TE
PAB
PSR2
PSR1
PSR0
Bit 7 (GP): General purpose register.
Bit 6 (INT): Interrupt Enable flag
0 : Masked by DISI or hardware interrupt
1 : Enabled by ENI/RETI instructions
Bit 5 (TS): TCC signal source
0 : Internal instruction cycle clock, P62 is a bidirectional I/O pin
1 : Transition on the TCC pin
Bit 4 (TE): TCC Signal Edge
0 : Increment if the transition from low to high takes place on the TCC pin
1 : Increment if the transition from high to low takes place on the TCC pin
Bit 3 (PAB): Prescaler Assigned Bit
0 : TCC
1 : WDT
Bit 2 ~ Bit 0 (PSR2 ~ PSR0): TCC/WDT prescaler bits
PSR2
PSR1
PSR0
TCC Rate
WDT Rate
0
0
0
1:2
1:1
0
0
1
1:4
1:2
0
1
0
1:8
1:4
0
1
1
1:16
1:8
1
0
0
1:32
1:16
1
0
1
1:64
1:32
1
1
0
1:128
1:64
1
1
1
1:256
1:128
The CONT register is both readable and writable.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 15
EM78P173N
8-Bit Microcontroller with OTP ROM
6.2.3 IOC5 ~ IOC6 (I/O Port Control Register)
0 : defines the relative I/O pin as output
1 : puts the relative I/O pin into high impedance
Only the lower 4 bits of IOC5 are available to be defined, IOC54~57 registers are fixed
to “0”
6.2.4 IOCB (Pull-down Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
/PD63
/PD62
/PD61
/PD60
-
/PD52
/PD51
/PD50
Bit 7(/PD63): Control bit used to enable pull-down of the P63 pin.
0 : Enable internal pull-down
1 : Disable internal pull-down
Bit 6 (/PD62): Control bit used to enable pull-down of the P62 pin.
Bit 5 (/PD61): Control bit used to enable pull-down of the P61 pin.
Bit 4 (/PD60): Control bit used to enable pull-down of the P60 pin.
Bit 3: Not used. Set to “1” at all time (R/W).
Bit 2 (/PD52): Control bit used to enable pull-down of the P52 pin.
Bit 1 (/PD51): Control bit used to enable pull-down of the P51 pin.
Bit 0 (/PD50): Control bit used to enable pull-down of the P50 pin.
The IOCB Register is both readable and writable.
6.2.5 IOCC (Open-drain Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
OD67
OD66
OD65
OD64
-
OD62
OD61
OD60
Bit 7 (OD67): Control bit used to enable open-drain of the P67 pin.
0 : Disable open-drain output
1 : Enable open-drain output
Bit 6 (OD66): Control bit used to enable open-drain of the P66 pin.
Bit 5 (OD65): Control bit used to enable open-drain of the P65 pin.
Bit 4 (OD64): Control bit used to enable open-drain of the P64 pin.
Bit 3: Not used. Set to “0” at all time (R/W).
Bit 2 (OD62): Control bit used to enable open-drain of the P62 pin.
Bit 1 (OD61): Control bit used to enable open-drain of the P61 pin.
Bit 0 (OD60): Control bit used to enable open-drain of the P60 pin.
The IOCC Register is both readable and writable.
16 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.2.6 IOCD (Pull-high Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
/PH67
/PH66
/PH65
/PH64
-
/PH62
/PH61
/PH60
Bit 7 (/PH67): Control bit is used to enable pull-high of the P67 pin.
0 : Enable internal pull-high
1 : Disable internal pull-high
Bit 6 (/PH66): Control bit used to enable pull-high of the P66 pin.
Bit 5 (/PH65): Control bit used to enable pull-high of the P65 pin.
Bit 4 (/PH64): Control bit used to enable pull-high of the P64 pin.
Bit 3: Not used. Set to “1” at all time (R/W).
Bit 2 (/PH62): Control bit used to enable pull-high of the P62 pin.
Bit 1 (/PH61): Control bit used to enable pull-high of the P61 pin.
Bit 0 (/PH60): Control bit used to enable pull-high of the P60 pin.
The IOCD Register is both readable and writable.
6.2.7 IOCE (WDT Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
WDTE
EIS
GP
GP
GP
GP
GP
GP
Bit 7 (WDTE): Control bit used to enable the Watchdog timer.
0 : Disable WDT
1 : Enable WDT
Bit 6 (EIS): Control bit is used to define the function of P60 (/INT) pin.
0 : P60, bidirectional I/O pin.
1 : /INT, external interrupt pin.
When EIS is "0," the path of /INT is masked. When EIS is "1," the status
of /INT pin can also be read by way of reading Port 6 (R6).
See Figure 6-6 under Section 6.4 for reference.
EIS is both readable and writable.
WDTE is both readable and writable.
Bits 5 ~ 0: General purpose register.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 17
EM78P173N
8-Bit Microcontroller with OTP ROM
6.2.8 IOCF (Interrupt Mask Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
-
-
-
-
-
EXIE
ICIE
TCIE
Bits 7 ~ 3: Not used. Set to “1” at all time.
Individual interrupt is enabled by setting its associated control bit in the
IOCF to "1".
Global interrupt is enabled by the ENI instruction and is disabled by the
DISI instruction. Refer to Figure 6-10.
Bit 2 (EXIE): EXIF interrupt enable bit
0 : disable EXIF interrupt
1 : enable EXIF interrupt
Bit 1 (ICIE): ICIF interrupt enable bit
0 : disable ICIF interrupt
1 : enable ICIF interrupt
Bit 0 (TCIE): TCIF interrupt enable bit
0 : disable TCIF interrupt
1 : enable TCIF interrupt
The IOCF register is both readable and writable.
6.3 TCC/WDT and Prescaler
An 8-bit counter is available as prescaler for the TCC or WDT. The prescaler is
available for the TCC only or the WDT only, one at a time and the PAB bit of the CONT
register is used to determine the prescaler assignment. The PSR0 ~ PSR2 bits
determine the ratio. The prescaler is cleared each time an instruction is written to TCC
under TCC mode. The WDT and prescaler, when assigned to WDT mode, are cleared
by the “WDTC” or “SLEP” instructions. Figure 6-4 depicts the TCC / WDT circuit
diagram.
„
18 •
R1 (TCC) is an 8-bit timer/counter. The TCC clock source can be internal or
external clock input (edge selectable from TCC pin). If the TCC signal source is
from an internal clock, the TCC will be incremented by 1 at every instruction cycle
(without prescaler). Referring to Figure 6-4, CLK=Fm/2 or CLK=Fm/4, depends on
the Code Option bit CLK. CLK=Fm/2 is used if CLK bit is "0", and CLK=Fm/4 is
used if CLK bit is "1". If the TCC signal source is from an external clock input, TCC
is incremented by 1 at every falling edge or rising edge of the TCC pin.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
„
The watchdog timer is a free running on-chip RC oscillator. The WDT will keep
running even when the oscillator driver has been turned off (i.e. in sleep mode).
During normal operation or sleep mode, a WDT time-out (if enabled) will cause the
device to reset. The WDT can be enabled or disabled any time during normal
mode by software programming. Refer to WDTE bit of the IOCE register. Without
prescaler, the WDT time-out period is approximately 18 ms 1 (default).
Fm/2 or Fm/4
Fs
TIMERSC (BANK1-RF)
1
0
Data Bus
MUX
TCC Pin
1
0
1
MUX
MUX
0
TCC (R1)
TE (CONT)
0
WDT
1
TCC overflow
interrupt
PAB
TS
8-Bit Counter
MUX
8 to 1 MUX
PAB
1
WDTE
(IOCE)
0
MUX
PAB
WDT Time Out
Figure 6-4 TCC and WDT Block Diagram
6.4 I/O Ports
The I/O registers, both Port 5 and Port 6, are bidirectional tri-state I/O ports. Port 6 can
be pulled-high internally by software except P63. In addition, Port 6 can also have
open-drain output by software except P63. Input status changed interrupt (or wake-up)
function is available from Port 6. P50 ~ P52 and P60 ~ P63 pins can be pulled-down by
software. Each I/O pin can be defined as "input" or "output" pin by the I/O control
register (IOC5 ~ IOC6). The I/O registers and I/O control registers are both readable
and writable. The I/O interface circuits for Port 5 and Port 6 are shown in Figure 6-5,
Figure 6-6 and Figure 6-7 respectively.
1
Vdd = 5V, WDT time-out period = 16.8ms ± 30% at 25°C
Vdd = 3V, WDT time-out period = 18ms ± 30% at 25°C
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 19
EM78P173N
8-Bit Microcontroller with OTP ROM
PCRD
Port
Q
P
R
_
Q
C
L
Q
P
R
_
Q
C
L
D
CLK
PCWR
IOD
D
CLK
PDWR
PDRD
0
M
U
X
1
Note: Pull-down is not shown in the figure.
Figure 6-5 I/O Port and I/O Control Register Circuit for Port 5, 6
PCRD
Q P
R D
_ C LK
Q C
L
Q P
R D
_ C LK
Q C
L
P o rt
B it 6 o f
IO C E
D P
R Q
C LK _
C Q
L
0
1
PCW R
IO D
PDW R
M
U
X
PDRD
T10
P
D R Q
C LK _
C Q
L
Note: Pull-high (down) and open-drain are not shown in the figure.
Figure 6-6 I/O Port and I/O Control Register Circuit for P60 (/INT)
20 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
PORT
0
1
Q
_
Q
P
R D
CLK
C
L
PCWR
Q
_
Q
P
D
R
CLK
C
L
PDWR
IOD
M
U
X
TIN
PDRD
P
R
CLK
C
L
D
Q
_
Q
Note: Pull-high (down) and open-drain are not shown in the figure.
Figure 6-7 I/O Port and I/O Control Register Circuit for P61~P67
ICIE
D
P
R
Q
Interrupt
CLK
C
L
_
Q
ICIF
ENI Instruction
P
D R
P60
P61
P62
P63
Q
CLK
_
C Q
L
P64
P65
P66
P67
Q
P
R D
CLK
_
Q C
L
DISI Instruction
/SLEP
Interrupt
(Wake-up from
SLEEP)
Next Instruction
(Wake-up from
SLEEP)
Figure 6-8 Block Diagram of I/O Port 6 with Input Change Interrupt/Wake-up
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 21
EM78P173N
8-Bit Microcontroller with OTP ROM
Table 6-1 Usage of Port 6 Input Change Wake-up/Interrupt Function
Usage of Port 6 Input Status Change Wake-up/Interrupt
(I) Wake-up from Port 6 Input Status Change
(II) Port 6 Input Status Change Interrupt
(a) Before Sleep
1. Read I/O Port 6 (MOV R6,R6)
1. Disable WDT
2. Execute “ENI”
2. Read I/O Port 6 (MOV R6,R6)
3. Enable interrupt (Set IOCF.1)
3. Execute "ENI" or "DISI"
4. IF Port 6 change (interrupt)
→ Interrupt Vector (008H)
4. Enable interrupt (Set IOCF.1)
5. Execute "SLEP" instruction
(b) After Wake-up
1. IF "ENI" → Interrupt Vector (008H)
2. IF "DISI" → Next instruction
6.5 Reset and Wake-up
6.5.1 Reset
A Reset is initiated by one of the following events:
1) Power-on reset
2) /RESET pin input "low"
3) WDT time-out (if enabled).
4) Low Voltage Reset
The device is kept under reset condition for a period of approximately 18 ms or
150 µs (Events 1 and 4 are approximately 18 ms and Events 2, 3 are approximately
150 µs) after a reset is detected.
„
The oscillator is running, or will be started.
„
The Program Counter (R2) is set to all "0."
„
All I/O port pins are configured as input mode (high-impedance state)
„
The Watchdog timer and prescaler are cleared.
„
When power is switched on, the upper 3 bits of R3 are cleared.
„
The bits of the CONT register are set to all "1" except for Bit 6 (INT flag).
„
The bits of the IOCB register are set to all "1."
„
The IOCC register is cleared.
„
The bits of the IOCD register are set to all "1."
„
Bit 7 of the IOCE register is set to "1," and Bit 6 is cleared.
„
Bits 0 ~ 2 of RF and Bits 0 ~ 2 of IOCF registers are cleared.
Sleep (power down) mode is asserted by executing the “SLEP” instruction. While
entering Sleep mode, WDT (if enabled) is cleared but keeps on running. After a
wake-up in IRC mode (IRC 4 MHz / 5V), wake-up time is 1.5 µs, XT mode (4 MHz / 5V)
wake-up time is 1.5 ms.
22 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
The controller can be awakened by:
1) External reset input on /RESET pin
2) WDT time-out (if enabled)
3) Port 6 Input Status changed (if enabled)
4) External (P60, /INT) pin changes (if EXWE is enabled)
5) Low voltage detector (if LVDWE is enabled)
The first two cases will cause the EM78P173N to reset. The T and P flags of R3 are
used to determine the source of the reset (wake-up). The last case is considered the
continuation of program execution and the global interrupt ("ENI" or "DISI" being
executed) determines whether or not the controller branches to the interrupt vector
following a wake-up. If ENI is executed before SLEP, the instruction will begin to
execute from Address 008H after wake-up. If DISI is executed before SLEP, the
operation will restart from the succeeding instruction right next to SLEP after a wake-up.
After a wake-up in IRC mode (IRC 4MHz / 5V), the wake-up time is 1.5 µs, XT mode
(4 MHz / 5V) wake-up time is 1.5 ms.
One or more of Cases 2 and 5 can be enabled before going into Sleep mode. That is,
[a] if WDT is enabled before SLEP, Port 6 Input Status Change Interrupt must be
disabled. Hence, the EM78P173N can be awakened only by Case 1 or Case 2.
Refer to Section 6.6, Interrupt for further details.
[b] if Port 6 Input Status Change Interrupt is enabled before SLEP, WDT must be
disabled. However, the EM78P173N can be awakened only by Case 3.
[c] if External (P60, INT) pin change is used to wake-up the EM78P173N and the
EXWE bit of the Bank 1-RE register is enabled before SLEP, the WDT must be
disabled. Hence, the EM78P173N can be waken-up only by Case 4.
[d] if Low voltage detector is used to wake up the EM78P173N and the LVDWE bit of
the Bank 0-RE register is enabled before SLEP, the WDT must be disabled by
software. Hence, the EM78P173N can be awakened only by Case 5.
If Port 6 Input Status Change Interrupt is used to wake-up the EM78P173N (Case [a]
above), the following instructions must be executed before SLEP:
MOV A, @xxxx1110b
CONTW
WDTC
MOV A, @0xxxxxxxb
IOW RE
MOV R6, R6
MOV A, @00000x1xb
IOW RF
ENI (or DISI)
SLEP
; Select the WDT prescaler, it must be
; set over 1:1
; Clear WDT and prescaler
; Disable WDT
; Read Port 6
; Enable Port 6 input change interrupt
; Enable (or disable) global interrupt
; Sleep
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 23
EM78P173N
8-Bit Microcontroller with OTP ROM
NOTE
1. After waking up from sleep mode, WDT is automatically enabled. The WDT
enable/disable operation after waking up from sleep mode should be appropriately
defined in the software.
2. To avoid a reset from occurring when the Port 6 Input Status Changed Interrupt
enters into interrupt vector or is used to wake-up the MCU, the WDT prescaler must
be set above the 1:1 ratio.
6.5.2 Wake-up and Interrupt Modes Operation Summary
The controller can be awakened from sleep mode and idle mode. The wake-up signals
are listed as follows.
Wake-up
Signal
Condition
Signal
Sleep Mode
DISI
ENI
Idle Mode
DISI
ENI
Green Mode
DISI
ENI
Normal Mode
DISI
ENI
EXWE = 0
EXIE = 0
Wake-up is invalid
Wake-up is invalid
Interrupt is invalid
Interrupt is invalid
EXWE = 0
EXIE = 1
External
INT
EXWE = 1
EXIE = 0
EXWE = 1
EXIE = 1
Port 6
ICIE = 0
Pin
Change
ICIE = 1
Wake-up is invalid
Wake up
+
Next Instruction
Wake up Wake up
+
+
Next
Interrupt
Instruction Vector
Wake up
+
Next Instruction
Wake up Wake up
+
+
Next
Interrupt
Instruction Vector
TCIE = 0
TCC
Overflow
Low
Voltage
Detector
24 •
Wake-up is invalid
Wake-up is invalid
TCIE = 1
LVDWE = 0
LVDIE = 0
Interrupt
Next
+
Wake-up is invalid
Instruction Interrupt
Vector
Wake up
+
Interrupt is invalid
Next Instruction
Wake up Wake up
Interrupt
+
+
Next
+
Next
Interrupt Instruction Interrupt
Instruction Vector
Vector
Wake up
+
Interrupt is invalid
Next Instruction
Wake up Wake up Wake up Wake up
+
+
+
+
Next
Interrupt
Next
Interrupt
Instruction Vector Instruction Vector
Wake-up is invalid
Interrupt is invalid
Interrupt
Next
+
Instruction Interrupt
Vector
Interrupt is invalid
Interrupt
Next
+
Instruction Interrupt
Vector
Interrupt is invalid
Wake up Wake up
+
+
Next
Interrupt
Instruction Vector
Interrupt is invalid
Wake up Wake up
Interrupt
Interrupt
+
+
Next
+
Next
+
Next
Interrupt Instruction Interrupt Instruction Interrupt
Instruction Vector
Vector
Vector
Wake-up is invalid
Interrupt is invalid
Interrupt is invalid
Interrupt
Interrupt
Next
+
Next
+
Wake-up is invalid
Instruction Interrupt Instruction Interrupt
Vector
Vector
Wake up
Wake up
LVDWE = 1
+
+
Interrupt is invalid
Interrupt is invalid
LVDIE = 0
Next Instruction
Next Instruction
Wake up Wake up Wake up Wake up
Interrupt
Interrupt
LVDWE = 1
+
+
+
+
Next
+
Next
+
Next
Interrupt
Next
Interrupt Instruction Interrupt Instruction Interrupt
LVDIE = 1
Instruction Vector Instruction Vector
Vector
Vector
LVDWE = 0
Wake-up is invalid
LVDIE = 1
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.5.3 Summary of Registers Initialized Values
Address
N/A
N/A
0×05
0×06
N/A
0×00
0×01
0×02
Name
IOC5
IOC6
P5
P6
CONT
R0 (IAR)
R1 (TCC)
R2 (PC)
Reset Type
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit Name
×
×
×
×
C53
C52
C51
C50
Power-on
0
0
0
0
1
1
1
1
/RESET and WDT
0
0
0
0
1
1
1
1
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
C67
C66
C65
C64
C63
C62
C61
C60
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
×
×
×
×
P53
P52
P51
P50
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
P
P
P
P
P
P
P
P
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
P67
P66
P65
P64
P63
P62
P61
P60
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
P
P
P
P
P
P
P
P
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
GP
INT
TS
TE
PAB
Power-on
1
0
1
1
1
1
1
1
/RESET and WDT
1
0
1
1
1
1
1
1
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
U
U
U
U
U
U
U
U
/RESET and WDT
P
P
P
P
P
P
P
P
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Pin Change
Jump to Address 0x08 or continue to execute next
instruction.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
PSR2 PSR1 PSR0
• 25
EM78P173N
8-Bit Microcontroller with OTP ROM
Address
0×03
0×04
Name
R3 (SR)
R4 (RSR)
Bank 0
0×0E
RE
(LVDCR)
0×0F
Bank 0
RF (ISR)
Bank 1
0×05
R5
(TBHP)
Bank 1
0×06
R6
(TBLP)
Reset Type
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit Name
RST
GP1
GP0
T
P
Z
DC
C
Power-on
0
0
0
1
1
U
U
U
/RESET and WDT
0
0
0
*
*
P
P
P
Wake-up from Pin Change
1
P
P
*
*
P
P
P
Bit Name
GP
Bank 0
-
-
-
-
-
-
Power-on
0
0
U
U
U
U
U
U
/RESET and WDT
0
0
P
P
P
P
P
P
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
/LVD
LVDIF
×
×
×
×
×
LVDWE
Power-on
1
0
0
0
0
0
0
0
/RESET and WDT
1
0
0
0
0
0
0
0
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
×
×
×
×
×
EXIF
ICIF
TCIF
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Pin Change
0
0
0
0
0
P
P
P
Bit Name
MLB
×
×
×
×
×
RBit 9
RBit 8
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
RBit7
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Pin Change
P
P
P
P
P
P
P
P
×
×
×
EXWE
Bit Name
Bank 1
0×0E
RE
(LVD ICR)
Bank 1
0×0F
26 •
RF
(SC and
COCR)
RBit 6 RBit 5 RBit 4 RBit 3 RBit 2 RBit 1
LVDIE LVDEN LVD1 LVD0
RBit 0
Power-on
0
0
1
1
0
0
0
0
/RESET and WDT
0
0
1
1
0
0
0
0
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
×
×
×
RCM1 RCM0
Power-on
0
1
1
0
0
0
Word 1
/RESET and WDT
0
1
1
0
0
0
<6,5>
Wake-up from Pin Change
P
P
P
P
P
P
TIMERSC CPUS IDLE
P
P
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Address
Name
Reset Type
Bit 7
Bit Name
0×0B
0×0C
IOCB
IOCC
0×0E
0×0F
0×10
~
0×3F
IOCD
IOCE
IOCF
R10~R3F
Bit 5
Bit 4
/PD63 /PD62 /PD61 /PD60
Bit 3
x
Bit 2
Bit 1
Bit 0
/PD52 /PD51 /PD50
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
OD67
OD66
Power-on
0
0
0
0
0
0
0
0
/RESET and WDT
0
0
0
0
0
0
0
0
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
0×0D
Bit 6
OD65 OD64
/PH67 /PH66 /PH65 /PH64
×
×
OD62 OD61
OD60
/PH62 /PH61 /PH60
Power-on
1
1
1
1
1
1
1
1
/RESET and WDT
1
1
1
1
1
1
1
1
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Bit Name
WDTE
EIS
GP
GP
GP
GP
GP
GP
Power-on
1
0
1
1
1
1
1
1
/RESET and WDT
1
0
1
1
1
1
1
1
Wake-up from Pin Change
1
P
P
P
P
P
P
P
Bit Name
×
×
×
×
×
EXIE
ICIE
TCIE
Power-on
1
1
1
1
1
0
0
0
/RESET and WDT
1
1
1
1
1
0
0
0
Wake-up from Pin Change
1
1
1
1
1
P
P
P
Bit Name
-
-
-
-
-
-
-
-
Power-on
U
U
U
U
U
U
U
U
/RESET and WDT
P
P
P
P
P
P
P
P
Wake-up from Pin Change
P
P
P
P
P
P
P
P
Legend: ×: Not used
U: Unknown or don’t care
P: Previous value before reset
* Refer to tables provided in the next section (Section 6.5.4).
6.5.4 Status of RST, T, and P of the Status Register
A Reset condition is initiated by the following events
1) A power-on condition
2) A high-low-high pulse on /RESET pin
3) Watchdog timer time-out
The values of T and P listed in the table below are used to check how the processor
wakes up.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 27
EM78P173N
8-Bit Microcontroller with OTP ROM
Table 6-2
Values of RST, T, and P after a Reset
Reset Type
RST
T
P
Power on
0
1
1
/RESET during Operation mode
0
*P
*P
/RESET wake-up during Sleep mode
0
1
0
WDT during Operation mode
0
0
*P
WDT wake-up during Sleep mode
0
0
0
Wake-up on pin change during Sleep mode
1
1
0
* P: Previous status before reset
The following table shows the events that may affect the status of T and P.
Table 6-3
Status of T and P Being Affected by Events
Event
RST
T
P
Power on
0
1
1
WDTC instruction
*P
1
1
WDT time-out
0
0
*P
SLEP instruction
*P
1
0
Wake-up on pin change during Sleep mode
1
1
0
* P: Previous status before reset
VDD
D
Q
CLK
CLR
Oscillator
CLK
Power-on
Reset
Voltage
Detector
W DTE
W DT
W DT
Timeout
Setup Time
RESET
/RESET
Figure 6-9 Controller Reset Block Diagram
28 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.6 Interrupt
The EM78P173N has four interrupts as listed below:
1) TCC overflow interrupt
2) Port 6 Input Status Change Interrupt
3) External interrupt [(P60, /INT) pin]
4) Low Voltage Detect Interrupt
Before the Port 6 Input Status Changed Interrupt is enabled, reading Port 6 (e.g. "MOV
R6,R6") is necessary. Each pin of Port 6 will have this feature if its status changes.
Any pin configured as output or P60 pin configured as /INT is excluded from this
function. The Port 6 Input Status Changed Interrupt can wake up the EM78P173N from
Sleep mode if Port 6 is enabled prior to going into Sleep mode by executing SLEP
instruction. When the chip wakes-up, the controller will continue to execute the
program in-line if the global interrupt is disabled. If the global interrupt is enabled, it will
branch to the Interrupt Vector 008H.
RF is the interrupt status register that records the interrupt requests in the relative
flags/bits. IOCF is an interrupt mask register. The global interrupt is enabled by the
ENI instruction and is disabled by the DISI instruction. When one of the interrupts
(enabled) occurs, the next instruction will be fetched from Address 008H. Once in the
interrupt service routine, the source of an interrupt can be determined by polling the flag
bits in RF. The interrupt flag bit must be cleared by instructions before leaving the
interrupt service routine and before interrupts are enabled to avoid recursive interrupts.
The flag (except ICIF bit) in the Interrupt Status Register (RF) is set regardless of the
status of its mask bit or the execution of ENI. Note that the outcome of RF will be the
logic AND of RF and IOCF (refer to Figure 6-10). The RETI instruction ends the
interrupt routine and enables the global interrupt (the execution of ENI).
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 29
EM78P173N
8-Bit Microcontroller with OTP ROM
VCC
P
D
R
CLK
C
L
RF
/IR Q n
IR Q n
Q
_
Q
RFRD
IN T
IR Q m
E N I/D IS I
IO C F
/R E S E T
Q
_
Q
P
D
R
CLK
C
L
IO D
IO C F W R
IO C F R D
RFW R
Figure 6-10 Interrupt Input Circuit
Before an interrupt subroutine is executed, the contents of ACC and the R3 and R4
registers will be saved by the hardware. If another interrupt occurs, the ACC, R3, and
R4 will be replaced by the new interrupt. After the interrupt service routine is
completed, the ACC, R3, and R4 registers are restored.
Interrupt sources
ACC
Interrupt
occurs
STACKACC
ENI/DISI
R3
RETI
R4
STACKR3
STACKR4
Figure 6-11 Interrupt Backup Diagram
6.7 Oscillator
6.7.1 Oscillator Modes
The EM78P173N can be operated in four different oscillator modes, such as External
RC oscillator mode (ERC), Internal RC oscillator mode (IRC), High Crystal oscillator
mode (XT, HXT1,2), and Low Crystal oscillator mode (LXT1, 2). The desired mode can
be selected by programming OSC3, OSC2, OSC1, and OSC0 in the Code Option
register. Table 6-4 describes how these four oscillator modes are defined.
30 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Table 6-4
Oscillator Modes Defined by OSC
Oscillator Modes
OSC3 OSC2 OSC1 OSC0
1
0
0
0
0
1
0
0
0
1
0
0
1
0
ERC (External RC oscillator mode); P64/RCOUT act as P64
ERC (External RC oscillator mode); P64/RCOUT act as RCOUT
2
IRC (Internal RC oscillator mode); P64/RCOUT act as P64
2
IRC (Internal RC oscillator mode); P64/RCOUT act as RCOUT
0
0
1
1
3
0
1
0
0
3
0
1
0
1
3
0
1
1
0
3
HXT2 (Frequency range of HXT2 mode is 12 MHz~6 MHz)
0
1
1
1
XT (Frequency range of XT mode is 6 MHz~1 MHz) (default)
1
1
1
1
LXT1 (Frequency range of LXT1 mode is 1MHz~100kHz)
HXT1 (Frequency range of HXT1 mode is 20 MHz~12 MHz)
LXT2 (Frequency range of LXT2 mode is 32.768kHz)
1
In ERC mode, ERCin is used as oscillator pin. RCOUT/P64 is defined by code option Word 1
Bit 4 ~ Bit 1.
2
In IRC mode, P65 is normal I/O pin. RCOUT/P64 is defined by code option Word 1 Bit 4 ~ Bit 1.
3
In LXT1, LXT2, HXT1, HXT2 and XT modes; OSCI and OSCO are used as oscillator pins.
These pins cannot and should not be defined as normal I/O pins.
The maximum operational frequency of the crystal/resonator under different VDD is
listed below.
Table 6-5
Summary of Maximum Operating Speeds
Conditions
Two cycles with two clocks
VDD
Max Freq. (MHz)
2.1
4.0
3.0
8.0
5.0
20.0
6.7.2 Crystal Oscillator/Ceramic Resonators (Crystal)
The EM78P173N can be driven by an external clock signal through the OSCI pin as
shown in the following figure.
OSCI
Ext. Clock
OSCO
EM78P173N
Figure 6-12 Circuit for External Clock Input
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 31
EM78P173N
8-Bit Microcontroller with OTP ROM
In most applications, Pin OSCI and Pin OSCO can be connected with a crystal or
ceramic resonator to generate oscillation. Figure 6-13 depicts such a circuit. The
same thing applies whether it is in the HXT mode or in the LXT mode.
In Figure 6-14, when the connected resonator in OSCI and OSCO is used in
applications, the 1 MΩ R1 needs to be shunted with resonator.
C1
OSCI
EM78P173N
Crystal
OSCO
RS
C2
Figure 6-13 Circuit for Crystal/Resonator
C1
OSCI
Resonator
EM78P173N
R1
OSCO
C2
Figure 6-14 Circuit for Crystal/Resonator
Table 6-6 provides the recommended values of C1 and C2. Since each resonator has
its own attribute, refer to its specification for appropriate values of C1 and C2. RS, a
serial resistor, may be necessary for AT strip cut crystal or low frequency mode.
32 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Table 6-6 Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonator
Oscillator Type
Frequency Mode
Frequency
LXT1
(100K~1 MHz)
Ceramic Resonators
XT
(1M~6 MHz)
LXT2 (32.768kHz)
LXT1
(100K~1 MHz)
Crystal Oscillator
XT
(1~6 MHz)
HXT2
(6~12 MHz)
HXT1
(12~20 MHz)
C1 (pF)
C2 (pF)
100kHz
200kHz
455kHz
1 MHz
1.0 MHz
2.0 MHz
4.0 MHz
60pF
60pF
40pF
30pF
30pF
30pF
20pF
60pF
60pF
40pF
30pF
30pF
30pF
20pF
32.768kHz
40pF
40pF
100kHz
200kHz
455kHz
1 MHz
455kHz
1.0 MHz
2.0 MHz
4.0 MHz
6.0 MHz
6.0 MHz
8.0 MHz
10.0 MHz
12.0 MHz
12.0 MHz
16.0 MHz
60pF
60pF
40pF
30pF
30pF
30pF
30pF
20pF
30pF
30pF
20pF
30pF
30pF
30pF
20pF
60pF
60pF
40pF
30pF
30pF
30pF
30pF
20pF
30pF
30pF
20pF
30pF
30pF
30pF
20pF
20.0 MHz
15pF
15pF
6.7.3 External RC Oscillator Mode
For some applications that do not require a very precise timing calculation, the RC
oscillator (Figure 6-15) offers a cost-effective oscillator configuration. Nevertheless, it
should be noted that the frequency of the RC oscillator is influenced by the supply
voltage, the values of the resistor (Rext), the capacitor (Cext), and even by the
operation temperature. Moreover, the frequency also changes slightly from one chip to
another due to manufacturing process variations.
In order to maintain a stable system frequency, the values of the Cext should not be
less than 20pF, and that the value of Rext should not be greater than 1 MΩ. If they
cannot be kept in this range, the frequency can be easily affected by noise, humidity,
and leakage.
The smaller the Rext in the RC oscillator is, the faster its frequency will be. On the
contrary, for very low Rext values, for instance, 1 KΩ, the oscillator becomes unstable
because the NMOS cannot discharge the current of the capacitance correctly.
Based on the above reasons, it must be kept in mind that all of the supply voltage, the
operation temperature, the components of the RC oscillator, the package types, the
way the PCB is layout, will affect the system frequency.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 33
EM78P173N
8-Bit Microcontroller with OTP ROM
Vcc
Rext
OSCI
Cext
EM78P173N
Figure 6-15 External RC Oscillator Mode Circuit
Table 6-7
RC Oscillator Frequencies
Cext
20pF
100pF
300pF
Rext
Average Fosc
5V, 25°C
Average Fosc
3V, 25°C
3.3k
2.064 MHz
1.901 MHz
5.1k
1.403 MHz
1.316 MHz
10k
750kHz
719.7kHz
100k
81.45kHz
81.33kHz
3.3k
647.3kHz
615.1 MHz
5.1k
430.8kHz
414.3kHz
10k
225.8kHz
219.8kHz
100k
23.88kHz
23.96kHz
3.3k
256.6kHz
245.3kHz
5.1k
169.5kHz
163.0kHz
10k
88.53kHz
86.14kHz
100k
9.283kHz
9.255kHz
Note: 1: These are measured in DIP packages
2. The values are for design reference only
3. The frequency drift is ± 30%
6.7.4
Internal RC Oscillator Mode
EM78P173N offers a versatile internal RC mode with default frequency value of 4 MHz.
The Internal RC oscillator mode has other frequencies (1 MHz, 8 MHz, and 16 MHz)
that can be set by Code Option (Word 1), RCM1, and RCM0. All these four main
frequencies can be calibrated by programming the Option Bits C0 ~ C4. Table 6-8
describes the EM78P173N internal RC drift with variation of voltage, temperature, and
process.
34 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Table 6-8 Internal RC Drift Rate (Ta=25°C, VDD=5V ± 5%, VSS = 0V)
Drift Rate
Internal RC
Temperature
(-40°C~85°C)
Voltage
(2.1V~5.5V)
Process
Total
4 MHz
± 2%
± 3%
± 2%
± 7%
16 MHz
± 2%
± 3%
± 2%
± 7%
8 MHz
± 2%
± 3%
± 2%
± 7%
1 MHz
± 2%
± 3%
± 2%
± 7%
Note: These are theoretical values provided for reference only. Actual values may vary
depending on the actual process.
6.8 Code Option Register
The EM78P173N has a Code Option word that is not part of the normal program
memory. The option bits cannot be accessed during normal program execution.
„
Code Option Register and Customer ID Register Arrangement Distribution:
Word 0
Word 1
Word 2
Bit 12 ~ Bit 0
Bit 12 ~ Bit 0
Bit 12 ~ Bit 0
6.8.1 Code Option Register (Word 0)
Word 0
Bit
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Mnemonic RESETEN ENWDT CLKS LVR1 LVR0
−
Bit 6
Bit 5
Bit 4
Bit 3
WDTPS1 WDTPS0 NRHL NRE
Bit 2~Bit 0
Protect
1
disable
disable 4 clocks High
High
−
High
High
High
High
Disable
0
enable
enable 2 clocks Low
Low
−
Low
Low
Low
Low
Enable
Bit 12 (RESETEN): Define Pin 63 as a reset pin
0 : /RESET enable
1 : /RESET disable
Bit 11 (ENWDT): Watchdog timer enable bit
0 : Enable
1 : Disable
Bit 10 (CLKS): Instruction period option bit.
0 : two oscillator periods
1 : four oscillator periods
Refer to the Instruction Set section.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 35
EM78P173N
8-Bit Microcontroller with OTP ROM
Bits 9 ~ 8 (LVR1 ~ LVR0): Low Voltage Reset control bits
VDD Reset Level
LVR1, LVR0
VDD Release Level
11
NA (Power-on Reset) (default)
10
2.7V
2.9V
01
3.5V
3.7V
00
4.0V
4.0V
Bit 7: Set to “1” at all time.
Bit 6 and Bit 5 (WDTPS1 and WDTPS0): WDT Time-out Period of device bits.
Table 6-9
WDT Time-out Period of Device Programming
WDTPS1
WDTPS0
*WDT Time-out Period
1
1
18 ms
1
0
4.5 ms
0
1
288 ms
0
0
72 ms
* These are theoretical values, provided for reference only
Bit 4 (NRHL): Noise rejection high/low pulse define bit. The INT pin has a falling edge
trigger.
0 : Pulses equal to 8/fc is regarded as signal
1 : Pulses equal to 32/fc is regarded as signal (Default)
Bit 3 (NRE): Noise rejection enable
0 : disable noise rejection
1 : enable noise rejection (default). However in Low Crystal oscillator
(LXT2) mode, the noise rejection circuit is always disabled.
Bits 2 ~ 0 (Protect): Protect Bits. Each protect status is as follows:
Protect Bits
Protect
0
1
Enable
Disable (Default)
Code Option Register (Word 1)
Word 1
Bit
Mne
monic
36 •
Bit 12 Bit 11 Bit 10 Bit 9
HLP C4
C3
C2
Bit 8
Bit 7
C1
C0
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
RCM1 RCM0 OSC3 OSC2 OSC1 OSC0
Bit 0
RCOUT
1
High High High High
High
High
High
High
High
High
High
High System-clock
0
Low Low Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Open-drain
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
Bit 12 (HLP): power consumption mode
0 : Low power consumption mode, applies to operating frequency at 400kHz or
below 400kHz
1 : High power consumption mode, applies to operating frequency above 400kHz
(default)
Bits 11 ~ 7 (C4 ~ C0): Internal RC mode Calibration bits. These bits must always be
set to “1” only (auto calibration).
Bit 6 and Bit 5 (RCM1, RCM0): RC mode selection bits
RCM 1
RCM 0
*Frequency (MHz)
1
1
4
1
0
16
0
1
8
0
0
1
* Theoretical values, for reference only
Bits 4 ~ 1 (OSC3, OSC2, OSC1 and OSC0): Oscillator Mode Select bits
Oscillator Modes
OSC3 OSC2 OSC1 OSC0
1
0
0
0
0
1
0
0
0
1
0
0
1
0
ERC (External RC oscillator mode); P64/RCOUT act as P64
ERC (External RC oscillator mode); P64/RCOUT act as RCOUT
2
IRC (Internal RC oscillator mode); P64/RCOUT act as P64
2
IRC (Internal RC oscillator mode); P64/RCOUT act as RCOUT
0
0
1
1
3
0
1
0
0
LXT1 (Frequency range of LXT1 mode is 1MHz~100kHz)
3
0
1
0
1
3
0
1
1
0
3
HXT2 (Frequency range of HXT2 mode is 12 MHz~6 MHz)
0
1
1
1
XT (Frequency range of XT mode is 6 MHz~1 MHz) (default)
1
1
1
1
HXT1 (Frequency range of HXT1 mode is 20 MHz~12 MHz)
LXT2 (Frequency range of LXT2 mode is 32.768kHz)
1
In ERC mode, ERCin is used as oscillator pin. RCOUT/P64 is defined by Code Option Word 1
Bit 4 ~ Bit 1.
2
In IRC mode, P65 is normal I/O pin. RCOUT/P64 is defined by Code Option Word 1 Bit 4 ~ Bit 1.
3
In LXT1, LXT2, HXT1, HXT2 and XT modes; OSCI and OSCO are used as oscillator pins.
These pins cannot and should not be defined as normal I/O pins.
Bit 0 (RCOUT): System clock or open-drain enable bit in IRC or ERC mode
0 : RCOUT pin is open drain
1 : RCOUT output System clock (Default)
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 37
EM78P173N
8-Bit Microcontroller with OTP ROM
Customer ID Register (Word 2)
Word 2
Bit
Mne
Bit 12 Bit 11 Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
−
SFS
ID9
ID8
ID7
ID6
ID5
ID4
ID3
ID2
ID1
ID0
1
−
16K 14 PIN High
High
High
High
High
High
High
High
High
High
0
−
128K 10 PIN Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
monic
TYPE
Bit 12: Not used. Set to “1” at all time.
Bit 11 (SFS): Sub Frequency Select for Green mode.
(Not included WDT time-out and POR release setup-up time)
0 : 128kHz
1 : 16kHz (default)
Bit 10 (TYPE): Type selection for EM78P173N
Type
MCU Type
0
EM78P173N-10Pin
1
EM78P173N-14Pin (Default)
Bits 9 ~ 0: Customer’s ID code
6.9 Power-on Consideration
Any microcontroller is not guaranteed to start to operate properly before the power
supply stabilizes at its steady state. Under customer application, when power is OFF,
Vdd must drop to below 1.8V and remains OFF for 10 µs before power can be switched
ON again. This way, the EM78P173N will reset and operate normally. The extra
external reset circuit will work well if Vdd can rise at very fast speed (50 ms or less).
However, under most cases where critical applications are involved, extra devices are
required to assist in solving the power-up problems.
6.10 Programmable Oscillator WDT Time-out Period
The Option word contains WDTPS0 and WDTPS1 which can be used to define the
oscillator WDT time-out Period. Theoretically, the range is from 4.5 ms to 288 ms. For
most of crystal or ceramic resonators, the lower the operation frequency, the longer the
set-up time may be required. Table 12 describes the values of the Oscillator WDT
Time.
38 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.11 External Power-on Reset Circuits
The circuitry in the figure
implements an external RC
Vdd
to produce the reset pulse.
R
The pulse width (time
/RESET
D
constant) should be kept
EM78P173N
long enough for Vdd to
Rin
reach minimum operation
C
voltage. This circuit is
used when the power
supply has a slow rise
Figure 6-16 External Power-up Reset Circuit
time.
Since the current leakage from the /RESET pin is ± 5 μA, it is recommended that R
should not be greater than 40K. In this way, the /RESET pin voltage is held below 0.2V.
The diode (D) acts as a short circuit at the moment of power down. The capacitor C will
discharge rapidly and fully. Rin, the current-limited resistor, will prevent high current or
ESD (electrostatic discharge) from flowing to pin /RESET.
6.12 Residue-Voltage Protection
When the battery is replaced, the device power (Vdd) is cut off but residue-voltage
remains. The residue-voltage may trip below the minimum Vdd, but not to zero. This
condition may cause a poor power-on reset. The following figures illustrate two
recommended methods on how to build a residue-voltage protection circuit for the
EM78P173N.
Vdd
Vdd
33K
EM78P173N
Q1
10K
/RESET
100K
1N4684
Figure 6-17 Residue Voltage Protection Circuit 1
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 39
EM78P173N
8-Bit Microcontroller with OTP ROM
Vdd
Vdd
R1
EM 78P173N
Q1
/RESET
R2
R3
Figure 6-18 Residue Voltage Protection Circuit 2
NOTE
Figure 6-17 and Figure 6-18 should be designed to ensure that the voltage of the
/RESET pin is larger than VIH (min).
40 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.13 Low Voltage Detector
When an unstable power source condition occurs, such as external power noise
interference or EMS test condition, a violent power vibration is generated. At the same
time, the Vdd becomes unstable as it could be operating below the working voltage.
When the system supply voltage (Vdd) is below the operating voltage, the IC kernel will
automatically keep all register status.
6.13.1 Low Voltage Reset (LVR)
LVR property is set at Bits 9 and 8 of Code Option Word 0. Detailed operation mode is
as follows:
Word 0
Bit 12
Bit 11 Bit 10 Bit 9 Bit 8 Bit 7
−
RESETEN ENWDT CLKS LVR1 LVR0
Bit 6
Bit 5
WDTPS1 WDTPS0
Bit 4
Bit 3
Bit 2 ~ Bit 0
NRHL
NRE
Protect
Bits 9 ~ 8 (LVR1 ~ LVR0): Low Voltage Reset enable bits
LVR1, LVR0
VDD Reset Level
11
VDD Release Level
N/A (Power-on Reset)
10
2.7V
2.9V
01
3.5V
3.7V
00
4.0V
4.2V
6.13.2 Low Voltage Detector (LVD)
LVD property is set at Registers Bank 0-RE and Bank 1-RE. Detailed operation mode
is explained below.
6.13.2.1 Bank 0 RE (LVD Control Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
/LVD
LVDIF
-
-
-
-
-
LVDWE
Bit 7 (/LVD): Low voltage Detector state. This is a read only bit. When the VDD pin
voltage is lower than the LVD voltage interrupt level (selected by LVD1
and LVD0), this bit will be cleared.
0: Low voltage is detected.
1: Low voltage is not detected or LVD function is disabled.
Bit 6 (LVDIF): Low Voltage Detector Interrupt Flag
LVDIF is reset to “0” by software or hardware
Bit 6 of Bank 0-RE: “1” means there’s interrupt request, and “0” means no
interrupt occurs.
Bit 0 (LVDWE): Low Voltage Detect wake-up enable bit
0: Disable Low Voltage Detect wake-up
1: Enable Low Voltage Detect wake-up
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 41
EM78P173N
8-Bit Microcontroller with OTP ROM
When the Low Voltage Detect is used to enter an interrupt vector or to
wake-up the IC from Sleep/Idle mode with the Low Voltage Detect
running, the LVDWE bit must be set to “Enable.“
6.13.2.2 Bank 1 RE (LVD Interrupt and Wake-up Register)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LVDIE
LVDEN
LVD1
LVD0
-
-
-
EXWE
NOTE
„
The Bank 1-RE <7> register is both readable and writable.
„
Individual interrupt is enabled by setting its associated control bit in the
Bank 1-RE<7> to "1."
„
Global interrupt is enabled by the ENI instruction and is disabled by the DISI
instruction. Refer to Figure 6-10
„
(Interrupt Input Circuit) in Section 6.6 (Interrupt).
Bit 7 (LVDIE): Low voltage Detector interrupt enable bit
0: Disable Low Voltage Detector interrupt
1: Enable Low Voltage Detector interrupt
When a detected low level voltage state is used to enter an interrupt
vector or enter the next instruction, the LVDIE bit must be set to
“Enable.”
Bit 6 (LVDEN): Low Voltage Detector enable bit
0: Disable Low voltage detector
1: Enable Low voltage detector
Bits 5 ~ 4 (LVD1 ~ 0): Low Voltage Detector level bits
LVDEN
LVD1, LVD0
1
11
1
10
1
01
1
00
0
××
LVD Voltage Interrupt Level
/LVD
Vdd ≤ 2.2V
0
Vdd > 2.2V
1
Vdd ≤ 3.3V
0
Vdd > 3.3V
1
Vdd ≤ 4.0V
0
Vdd > 4.0V
1
Vdd ≤ 4.5V
0
Vdd > 4.5V
1
NA
1
NOTE
IF Vdd has crossover at LVD voltage in interrupt level as VDD varies, LVD interrupt
will occur
42 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
6.13.3 Programming Process
Follow these steps to obtain data from the LVD:
1. Write to the two bits (LVD1: LVD0) on the Bank 1-RE (LVDCR) register to define the
LVD level
2. Set the LVDWE bit if the wake-up function is in use.
3. Set the LVDIE bit if the interrupt function is in use.
4. Write “ENI” instruction if the interrupt function is in use.
5. Set LVDEN bit to “1”
6. Write “SLEP” instruction or Polling /LVD bit
7. Clear the interrupt flag bit (LVDIF) when Low Voltage Detect occurs.
NOTE
„ The internal LVD module uses an internal circuit, and when the code option is set to
enable the LVD module, the current consumption will increase to about 5 µA.
„ During Sleep mode, the LVD module continues to operate. If the device voltage
drops slowly and crosses the detection point, the LVDIF bit will be set and the device
will wake up from Sleep mode. The LVD interrupt flag will remain set at priority
status.
„ When the system resets, the LVD flag is cleared.
The following figure shows the LVD module detection point in an external voltage
condition.
LVDIF is cleared by software
Vdd
VLVD
VRESET
LVDIF
Internal
Reset
<LVR Voltage drop
>LVR Voltage drop
Vdd < Vreset not longer than 80us, the system still keeps on operating
18ms
System occur reset
Figure 6-19 LVD/LVR Waveform with the Detection Point in an External Voltage Condition
„
When Vdd drops, but above VLVD, the LVDIF is kept at “0”.
„
When Vdd drops below VLVD, the LVDIF is set to “1”. If global ENI is enabled, the
LVDIF is also set to “1” and the next instruction will branch to an interrupt vector.
The LVD interrupt flag is cleared to “0” by software.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 43
EM78P173N
8-Bit Microcontroller with OTP ROM
„
When Vdds drops below VRESET at less than 80 µs, the system will keep all the
registers’ status and halts its operation, but the oscillation remains active.
„
When Vdd drops below VRESET at more than 80 µs, a system reset will occur.
Refer to Section 6.5.1 Reset and Wake-up Operation, for detailed Reset
description.
6.14 Instruction Set
Each instruction in the instruction set is a 13-bit word divided into an OP code and one
or more operands. Normally, all instructions are executed within one single instruction
cycle (one instruction consists of two oscillator periods), unless the program counter is
changed by instruction "MOV R2,A", "ADD R2,A", or by instructions of arithmetic or
logic operation on R2 (e.g., "SUB R2,A", "BS(C) R2,6", "CLR R2", etc.). In this case,
execution takes two instruction cycles.
If for some reasons, the specification of the instruction cycle is not suitable for certain
applications, try modifying the instruction as follows:
A) Modify one instruction cycle to consist of four oscillator periods.
B) "JMP", "CALL", "RET", "RETL", "RETI" or the conditional skip ("JBS", "JBC", "JZ",
"JZA", "DJZ”, "DJZA") commands which were tested to be true, are executed within
one instruction cycle. The instructions that are written to the program counter also
take one instruction cycle.
Case (A) is selected by the Code Option bit, called CLK. One instruction cycle consists
of two oscillator clocks if CLK is low; and four oscillator clocks if CLK is high.
Note that once the four oscillator periods within one instruction cycle is selected as in
Case (A), the internal clock source to TCC should be CLK=Fosc/4, instead of Fosc/2.
Moreover, the instruction set has the following features:
1) Every bit of any register can be set, cleared, or tested directly.
2) The I/O register can be regarded as general register. That is, the same instruction
can operate on the I/O register.
44 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
The following symbols are used in the Instruction Set table:
Convention:
R = Register designator that specifies which one of the registers (including operation and general
purpose registers) is to be utilized by the instruction.
Bit 6 in R4 determine the selected register bank.
b = Bit field designator that selects the value for the bit located in the register R and which affects
the operation.
k = 8 or 10-bit constant or literal value
Binary Instruction
1
Hex
Mnemonic
Operation
Status Affected
0 0000 0000 0000
0000
NOP
No Operation
None
0 0000 0000 0001
0001
DAA
Decimal Adjust A
0 0000 0000 0010
0002
CONTW
A → CONT
None
0 0000 0000 0011
0003
SLEP
0 → WDT, Stop oscillator
T, P
0 0000 0000 0100
0004
WDTC
0 → WDT
T, P
0 0000 0000 rrrr
000r
IOW R
A → IOCR
None 1
0 0000 0001 0000
0010
ENI
Enable Interrupt
None
0 0000 0001 0001
0011
DISI
Disable Interrupt
None
0 0000 0001 0010
0012
RET
[Top of Stack] → PC
None
0 0000 0001 0011
0013
RETI
[Top of Stack] → PC,
Enable Interrupt
None
0 0000 0001 0100
0014
CONTR
CONT → A
None
0 0000 0001 rrrr
001r
IOR R
IOCR → A
None 1
0 0000 01rr rrrr
00rr
MOV R,A
A→R
None
0 0000 1000 0000
0080
CLRA
0→A
Z
0 0000 11rr rrrr
00rr
CLR R
0→R
Z
0 0001 00rr rrrr
01rr
SUB A,R
R-A → A
Z, C, DC
0 0001 01rr rrrr
01rr
SUB R,A
R-A → R
Z, C, DC
0 0001 10rr rrrr
01rr
DECA R
R-1 → A
Z
0 0001 11rr rrrr
01rr
DEC R
R-1 → R
Z
0 0010 00rr rrrr
02rr
OR A,R
A∨R→A
Z
0 0010 01rr rrrr
02rr
OR R,A
A∨R→R
Z
0 0010 10rr rrrr
02rr
AND A,R
A&R→A
Z
0 0010 11rr rrrr
02rr
AND R,A
A&R→R
Z
0 0011 00rr rrrr
03rr
XOR A,R
A⊕R→A
Z
0 0011 01rr rrrr
03rr
XOR R,A
A⊕R→R
Z
0 0011 10rr rrrr
03rr
ADD A,R
A+R→A
Z, C, DC
0 0011 11rr rrrr
03rr
ADD R,A
A+R→R
Z, C, DC
C
This instruction is applicable to IOC5~IOC6, IOCB ~ IOCF only.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 45
EM78P173N
8-Bit Microcontroller with OTP ROM
(Continuation)
Binary Instruction
Hex
Mnemonic
Operation
Status Affected
0 0100 00rr rrrr
04rr
MOV A,R
R→A
Z
0 0100 01rr rrrr
04rr
MOV R,R
R→R
Z
0 0100 10rr rrrr
04rr
COMA R
/R → A
Z
0 0100 11rr rrrr
04rr
COM R
/R → R
Z
0 0101 00rr rrrr
05rr
INCA R
R+1 → A
Z
0 0101 01rr rrrr
05rr
INC R
R+1 → R
Z
0 0101 10rr rrrr
05rr
DJZA R
R-1 → A, skip if zero
None
0 0101 11rr rrrr
05rr
DJZ R
R-1 → R, skip if zero
None
0 0110 00rr rrrr
06rr
RRCA R
R(n) → A(n-1),
R(0) → C, C → A(7)
C
0 0110 01rr rrrr
06rr
RRC R
R(n) → R(n-1),
R(0) → C, C → R(7)
C
0 0110 10rr rrrr
06rr
RLCA R
R(n) → A(n+1),
R(7) → C, C → A(0)
C
0 0110 11rr rrrr
06rr
RLC R
R(n) → R(n+1),
R(7) → C, C → R(0)
C
0 0111 00rr rrrr
07rr
SWAPA R
R(0-3) → A(4-7),
R(4-7) → A(0-3)
None
0 0111 01rr rrrr
07rr
SWAP R
R(0-3) ↔ R(4-7)
None
0 0111 10rr rrrr
07rr
JZA R
R+1 → A, skip if zero
None
0 0111 11rr rrrr
07rr
JZ R
R+1 → R, skip if zero
None
0 100b bbrr rrrr
0xxx
BC R,b
0 → R(b)
None 2
0 101b bbrr rrrr
0xxx
BS R,b
1 → R(b)
None 3
0 110b bbrr rrrr
0xxx
JBC R,b
if R(b)=0, skip
None
0 111b bbrr rrrr
0xxx
JBS R,b
if R(b)=1, skip
None
1 00kk kkkk kkkk
1kkk
CALL k
PC+1 → [SP],
(Page, k) → PC
None
1 01kk kkkk kkkk
1kkk
JMP k
(Page, k) → PC
None
1 1000 kkkk kkkk
18kk
MOV A,k
k→A
None
1 1001 kkkk kkkk
19kk
OR A,k
A∨k→A
Z
1 1010 kkkk kkkk
1Akk
AND A,k
A&k→A
Z
1 1011 kkkk kkkk
1Bkk
XOR A,k
A⊕k→A
Z
1 1100 kkkk kkkk
1Ckk
RETL k
k → A,
[Top of Stack] → PC
1 1101 kkkk kkkk
1Dkk
SUB A,k
k-A → A
Z, C, DC
1 1111 kkkk kkkk
1Fkk
ADD A,k
k+A → A
Z, C, DC
1 1110 1001 kkkk
1E9k
BANK k
k → R4(6)
None
None
2
Note: This instruction is not recommended for RF operation.
3
46 •
This instruction cannot operate under RF.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
(Continuation)
Binary Instruction
Hex
Mnemonic
Operation
Status Affected
If Bank 1 R5.7=0,
machine code(7:0) → R
Else
1 1110 11rr rrrr
1Err
TBRD R
None
Bank 1 R5.7 = 1
Machine Code (12:8) →
R(4:0),
R(7:5)=(0,0,0)
7
Absolute Maximum Ratings
„
EM78P173N
Items
Rating
Temperature under bias
-40°C
to
85°C
Storage temperature
-65°C
to
150°C
Input voltage
Vss-0.3V
to
Vdd+0.5V
Output voltage
Vss-0.3V
to
Vdd+0.5V
Working Voltage
2.1V
to
5.5V
Working Frequency
DC
to
20 MHz
NOTE
These parameters are theoretical values and have not been tested.
8
Electrical Characteristics
8.1 DC Characteristics
Ta=25°C, VDD=5V±5%, VSS=0V
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
Crystal: VDD to 2.1V
Two cycles with two clocks
DC
−
4.0
MHz
FXT
Crystal: VDD to 3V
Two cycles with two clocks
DC
−
8.0
MHz
Crystal: VDD to 5V
Two cycles with two clocks
ERC
ERC: VDD to 5V
R: 5.1KΩ, C: 100pF
Input Leakage Current for input pins
VIN = VDD, VSS
VIH1
IIL
Input High Voltage (VDD=5V)
Ports 5, 6
VIL1
Input Low Voltage (VDD=5V)
Input High Threshold Voltage
(VDD=5V)
VIHT1
VILT1
Ports 5, 6
/RESET, TCC
(Schmitt trigger)
/RESET, TCC
Input Low Threshold Voltage (VDD=5V)
(Schmitt trigger)
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
DC
−
20.0
MHz
F±30%
F±30%
kHz
−
940
−
−
±1
−
µA
2.0
−
−
0.8
V
2.0
−
−
V
−
−
0.8
V
V
• 47
EM78P173N
8-Bit Microcontroller with OTP ROM
(Continuation)
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
VIHX1
Clock Input High Voltage (VDD=5V)
OSCI
2.5
−
−
V
VILX1
Clock Input Low Voltage (VDD=5V)
OSCI
−
−
1.0
V
VIH2
Input High Voltage (VDD=3V)
Ports 5, 6
1.5
−
−
V
Ports 5, 6
−
−
0. 4
V
1.5
−
−
V
−
−
0.4
V
VIL2
Input Low Voltage (VDD=3V)
VIHT2
Input High Threshold Voltage
(VDD=3V)
VILT2
/RESET, TCC
(Schmitt trigger)
/RESET, TCC
Input Low Threshold Voltage (VDD=3V)
(Schmitt trigger)
VIHX2
Clock Input High Voltage (VDD=3V)
OSCI
1.5
−
−
V
VILX2
Clock Input Low Voltage (VDD=3V)
OSCI
−
−
0.6
V
VOH1
Output High Voltage (Ports 5, Ports 6)
IOH = -12mA
2.4
−
−
V
VOL1
Output Low Voltage (P50~P53,
IOL = 12mA
P60~P62, P66~P67 are Schmitt trigger)
−
−
0.4
V
VOL2
Output Low Voltage (P64, P65)
IOL = 16.0mA
−
−
0.4
V
IOL = 20mA
−
−
0.4
V
70
−
85
µA
25
−
40
µA
−
−
1
µA
−
−
10
µA
−
15
20
µA
−
15
25
µA
−
−
1.5
mA
−
−
2.8
mA
VOL3
Output Low Voltage (P63)
IPH
Pull-high current
IPD
Pull-down current
ISB1
Power down current
ISB2
Power down current
ICC1
Operating supply current
at two clocks (VDD=3V)
ICC2
Operating supply current
at two clocks (VDD=3V)
ICC3
Operating supply current
at two clocks (VDD=5.0V)
ICC4
Operating supply current
at two clocks (VDD=5.0V)
Pull-high active,
input pin at VSS
Pull-down active,
input pin at VDD
All input and I/O pins at
VDD, Output pin floating,
WDT disabled
All input and I/O pins at
VDD, Output pin floating,
WDT enabled
/RESET= 'High',
Fosc=32kHz (Crystal type,
CLKS="0"), Output pin
floating, WDT disabled
/RESET= 'High',
Fosc=32kHz (Crystal type,
CLKS="0"), Output pin
floating, WDT enabled
/RESET= 'High',
Fosc=4 MHz
(Crystal type, CLKS="0"),
Output pin floating
/RESET= 'High',
Fosc=10 MHz
(Crystal type, CLKS="0"),
Output pin floating
NOTE
These parameters are theoretical values and have not been tested.
48 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
8.2 AC Characteristics
Ta=25°C, VDD=5V ± 5%, VSS=0V
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
Dclk
Input CLK duty cycle
−
45
50
55
%
Tins
Instruction cycle time
(CLKS="0")
Crystal type
100
−
DC
ns
RC type
500
−
DC
ns
Ttcc
TCC input period
−
(Tins+20)/N*
−
−
ns
Tdrh
Device reset hold time
Ta = 25°C, XTAL,
WDTPS1, WDTPS0=1, 1
16.8-30%
16.8
16.8+30%
ms
Trst
/RESET pulse width
Ta = 25°C
2000
−
−
ns
*Twdt1 Watchdog timer period
Ta = 25°C
WDTPS1, WDTPS0=1,1
16.8-30%
17.6
16.8+30%
ms
*Twdt2 Watchdog timer period
Ta = 25°C
WDTPS1, WDTPS0=1,0
4.5-30%
4.5
4.5+30%
ms
*Twdt3 Watchdog timer period
Ta = 25°C
WDTPS1, WDTPS0=0,1
288-30%
288
288+30%
ms
*Twdt4 Watchdog timer period
Ta = 25°C
WDTPS1, WDTPS0=0,0
72-30%
72
72+30%
ms
Tset
Input pin setup time
−
−
0
−
ns
Thold
Input pin hold time
−
−
20
−
ns
Cload=20pF
−
50
−
ns
Tdelay Output pin delay time
NOTE
These parameters are theoretical values and have not been tested.
The Watchdog Timer duration is determined by Code Option (Bit 6, Bit 5)
*N = selected prescaler ratio
*Twdt1: The Option Word (WDTPS1, WDTPS0) is used to define the oscillator WDT
time. In Crystal mode the WDT time-out length is the same as 18 ms.
*Twdt2: The Option Word (WDTPS1, WDTPS0) is used to define the oscillator WDT
time. In Crystal mode the WDT time-out length is the same as 4.5 ms.
*Twdt3: The Option Word (WDTPS1, WDTPS0) is used to define the oscillator WDT
time. In Crystal mode the WDT time-out length is the same as 288 ms.
*Twdt4: The Option Word (WDTPS1, WDTPS0) is used to define the oscillator WDT
time. In Crystal mode the WDT time-out length is the same as 72 ms.
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 49
EM78P173N
8-Bit Microcontroller with OTP ROM
9
Timing Diagrams
AC Test Input/Output Waveform
2.4
2.0
0.8
TEST POINTS
2.0
0.8
0.4
AC Testing : Input is driven at 2.4V for logic "1",and 0.4V for logic "0".Timing measurements are
made at 2.0V for logic "1",and 0.8V for logic "0".
RESET Timing (CLK="0")
NOP
Instruction 1
Executed
CLK
/RESET
Tdrh
TCC Input Timing (CLKS="0")
Tins
CLK
TCC
Ttcc
Figure 9-1 EM78P173N Timing Diagrams
50 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
APPENDIX
A Package Type
OTP MCU
Package Type
Pin Count
Package Size
EM78P173ND14J/S
DIP
14
300 mil
EM78P173NSO14J/S
SOP
14
150 mil
EM78P173NMS10J/S
MSOP
10
118 mil
These are Green products which do not contain hazardous substances and comply
with the third edition of Sony SS-00259 standard.
Pb content is less than 100ppm and complies with Sony specifications.
Part No.
EM78P173N
Electroplate type
Pure Tin
Ingredient (%)
Sn: 100%
Melting point (°C)
232°C
Electrical resistivity (μΩ-cm)
11.4
Hardness (hv)
8~10
Elongation (%)
>50%
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 51
EM78P173N
8-Bit Microcontroller with OTP ROM
B Package Information
„
14-Lead Plastic Dual In–line Package (PDIP) — 300 mil
Figure B-1a EM78P173N 14-Lead PDIP Package Type
52 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
EM78P173N
8-Bit Microcontroller with OTP ROM
„
14-Lead Small Outline Package (SOP) — 150 mil
Figure B-1b EM78P173N 14-Lead SOP Package Type
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)
• 53
EM78P173N
8-Bit Microcontroller with OTP ROM
„
10-Lead Micro Small Outline Package (MSOP) — 118 mil
Figure B-1c EM78P173N 10-Lead MSOP Package Type
54 •
Product Specification (V1.0) 04.20.2010
(This specification is subject to change without further notice)