EM78P341N/342N/343N
8-Bit Microprocessor with OTP ROM
5 Pin Description
5.1 EM78P341NP/M
Symbol
Pin No.
Type
Function
6-bit General purpose input/output pins
Pull-high/pull-down
1~3, 12~14
P50~P55
I/O
Wake up from sleep mode when the pin status changes
Default value at power-on reset
4-bit General purpose input/output pins
Open drain
P60, P61
66, 67
6~9
I/O
Default value at power-on reset
2-bit General purpose input/output pins
Default value at power-on reset
P70~P71
/INT
11, 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, 9
11~14
ADC0~ADC6
VREF
External reference voltage for ADC
Defined by ADCON (R9) <7>.
3
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, TCCA
OSCI
3, 7
12
I
I
TCC defined by CONT<5>
TCCA defined by IOC80 <1>
Crystal type: Crystal input terminal or external clock input pin
RC type: RC oscillator input pin
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
11
O
External clock signal input.
IR mode output pin.
Driving current = 10mA when the output voltage drops to
Vdd-0.5V at Vdd = 5V
IR OUT
O
13
Sinking current = 15mA when the output voltage drops to
GND+0.5V at Vdd = 5V
VDD
VSS
10
5
–
–
Power supply
Ground
4 •
Product Specification (V1.0) 12.01.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
