EM78P341N/342N/343N
8-Bit Microprocessor with OTP ROM
5.2 EM78P342NP/M
Symbol
Pin No.
Type
Function
6-bit General purpose input/output pins
Pull-high/pull-down
1~3, 16~18
P50~P55
I/O
Wake up from sleep mode when the pin status changes
Default value at power-on reset
8-bit General purpose input/output pins
Open drain
6~13
P60~67
I/O
Default value at power-on reset
2-bit General purpose input/output pins
Default value at power-on reset
P70~P71
/INT
15, 4
6
I/O
External interrupt pin triggered by a falling or a rising edge.
Defined by CONT <7>
I
I
I
7-bit Analog-to-Digital Converter
Defined by ADCON (R9)<1:0>
1, 2, 13
15~18
ADC0~ADC6
VREF
External reference voltage for ADC
Defined by ADCON (R9) <7>.
3
“-“ : the input pin of Vin- of the comparator
“+” : the input pin of Vin+ of the comparator
Pin CO is the comparator output
Defined by IOC80 <4:3>
CIN-
CIN+
CO
I
I
O
12
11
10
General-purpose Input only
If it remains at logic low, the device will be reset
Wake-up from sleep mode when pin status changes
Voltage on /RESET must not exceed Vdd during normal mode
/RESET
4
I
External Counter input
TCC defined by CONT<5>
TCCA defined by IOC80 <1>
TCCB defined by IOC90 <5>
TCCC defined by IOC90 <1>
TCC, TCCA
3, 7
8~9
I
I
TCCB, TCCC
Crystal type: Crystal input terminal or external clock input pin
RC type: RC oscillator input pin
OSCI
16
15
Crystal type: Output terminal for crystal oscillator or external
clock input pin.
RC type: Clock output with a duration of one instruction cycle
time. The prescaler is determined by the
CONT register.
OSCO
O
External clock signal input.
IR mode output pin.
Capable of driving and sinking current = 20mA when the output
voltage drops to 0.7Vdd at rise to 0.3Vdd at
Vdd = 5V
IR OUT
O
13
VDD
VSS
14
5
–
–
Power supply
Ground
Product Specification (V1.0) 12.01.2006
(This specification is subject to change without further notice)
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