EM78P417N/418N/419N
8-Bit Microprocessor with OTP ROM
5 Pin Description
5.1 EM78P417NP/M Pin Description
Symbol
Pin No. Type
Function
VDD
15
17
–
I
Power supply
■ XTAL type Crystal input terminal or external clock input pin
■ RC type: RC oscillator input pin
OSCI
■ XTAL 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
16
O
■ External clock signal input
■ General-purpose I/O pin
10,12~14,
16 ~ 18
P50 ~ P56
I/O
■ Default value at power-on reset
■ General-purpose I/O pin
1 ~ 3,
5 ~ 9
P60 ~ P67
INT
I/O
■ Default value at power-on reset
10
I
I
■ External interrupt pin triggered by falling edge
1 ~ 3,
5 ~ 9
■ Analog to Digital Converter
ADC0~ADC7
■ Defined by ADCON (R9)<0:2>
PWM1,
PWM2,
PWM3
■ Pulse width modulation outputs
12, 13, 14
14
O
I
■ Defined by PWMCON (IOC80)<5:7>
■ External reference voltage for ADC
■ Defined by ADCON (R9)<7>
VREF
■ 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
11
I
■ Real time clock/counter with Schmitt trigger input pin. It must be
tied to VDD or VSS if not in use.
TCC
VSS
18
4
I
–
Ground.
Product Specification (V1.0) 06.23.2005
• 5
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
