EM78P341N/342N/343N
8-Bit Microprocessor with OTP ROM
5.3 EM78P343NP/M/KM
Symbol
Pin No.
Type
Function
8-bit General purpose input/output pins
Pull-high/pull-down
1~4, 17~20
P50~P57
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
7~14
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
16, 5
7
I/O
External interrupt pin triggered by a falling or a rising edge.
Defined by CONT <7>
I
I
I
8-bit Analog-to-Digital Converter
Defined by ADCON (R9) <2:0>
2, 3, 14
16~20
ADC0~ADC7
VREF
External reference voltage for ADC
Defined by ADCON (R9) <7>.
4
“-“ : 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
13
12
11
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
5
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
4, 8
I
I
TCCB, TCCC
9~10
Crystal type: Crystal input terminal or external clock input pin
RC type: RC oscillator input pin
OSCI
17
16
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
14
VDD
VSS
15
6
–
–
Power supply
Ground
6 •
Product Specification (V1.0) 12.01.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
