EM78P142
8-Bit Microprocessor with OTP ROM
4 Pin Description
4.1 EM78P142SS10
Symbol
Pin No.
Type
Function
5-bit General purpose input/output pins
Pull-high/Pull-down Function
Wake up from Sleep/Idle mode when the pin status
changes
P50~P53
P55
1~3, 9~10
I/O
Default value at power-on reset
1-bit General purpose input/output pin
Pull-high/Open-drain Function
6
P67
I/O
I/O
I
Default value at power-on reset
2-bit General purpose input/output pins
Default value at power-on reset
When P71 is used as output function, it is an open drain
pin
P70~P71
ADC0~ADC6
8, 4
7-bit channel Analog-to-Digital Converter with 12-bit
resolution.
1~3, 6
8~10
Defined by ADCON (R9)<1:0>
If it remains at logic low, the device will be reset
Wake-up from Sleep/Idle mode when pin status
changes
/RESET
4
I
Voltage on /RESET must not exceed Vdd during normal
mode
Crystal type: Crystal input terminal.
RC type: RC oscillator input pin
OSCI
9
8
I
Crystal type: Output terminal for crystal oscillator.
RC type: Clock output with a duration of one instruction
cycle time.
OSCO
O
External clock signal input.
VDD
VSS
7
5
–
–
Power supply
Ground
Product Specification (V1.0) 01.25.2008
(This specification is subject to change without further notice)
• 3
ELAN [ ELAN MICROELECTRONICS CORP ]
