EM78P417N/418N/419N
8-Bit Microprocessor with OTP ROM
5.3 EM78P419NK/M Pin Description
Symbol
Pin No.
Type
Function
VDD
18
-
Power supply.
■ XTAL type Crystal input terminal or external clock input pin
■ RC type: RC oscillator input pin
OSCI
20
19
I
■ 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
O
■ External clock signal input
13,
■ General-purpose I/O pin
P50 ~ P57
P60 ~ P67
15 ~ 17
19 ~ 22,
I/O
I/O
■ Default value at power-on reset
4 ~ 6,
■ General-purpose I/O pin
8 ~ 12
■ Default value at power-on reset
■ General-purpose I/O pin
P70 ~ P74
INT
3, 2, 1, 24, 23
I/O
■ Default value at power-on reset
13
I
I
■ External interrupt pin triggered by falling edge.
4 ~ 6,
■ Analog to Digital Converter
ADC0 ~ADC7
8 ~ 12
■ Defined by ADCON (R9)<0:2>
PWM1,
PWM2,
PWM3
■ Pulse width modulation outputs
15, 16, 17
17
O
I
■ Defined by PWMCON (IOC80)<5:7>
■ External reference voltage for ADC
■ Defined by ADCON (R9)<7>.
VREF
■ “–“ –> the input pin of Vin- of the comparator
■ “+” –> the input pin of Vin+ of the comparator
■ Pin CO is the output of the comparator
■ Defined by CMPCON (IOCA0) <0:1>
CIN–,
CIN+,
CO
22,
3,
I
I
4
O
■ General-purpose Input only
■ If it remains at logic low, the device will be reset
■ Wake-up from sleep mode when pin status changes
/RESET
14
I
■ Voltage on /RESET must not exceed Vdd during normal
mode
■ Real time clock/counter with Schmitt trigger input pin. It must
be tied to VDD or VSS if not in use.
TCC
VSS
21
7
I
Ground.
-
Product Specification (V1.0) 06.23.2005
• 7
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
