EM78P809N
8-Bit Microcontroller
Symbol Pin No.
Type
Function
* P80~P83 are bi-directional I/O pins
* P80 can be used as 8-bit Timer/Counter 3 (TC3) or external Interrupt
Input 3 (INT3)
P80~P81
12~13
I/O
* P81 can be used as 8-bit Timer/Counter 4 (TC4) or programmable
divider output (PDO)
* P80 ~ P81 can be used as pull high or pull low pins
* P90~P97 are bi-directional I/O pins
P90~P97
4~11
I/O
* P90~P97 can be used as 8 channel 10-bit resolution A/D converter
* P97 can be used as AD reference power supply input (VREF)
VSS
NC
14
3
-
-
* Ground
* No connection
OTP Programming Pins
VPP
ACLK
27
1
I
Programming voltage input
CLK for OTP memory address increment
ROM code series input and series output pin
ROM code input clock
I
DATAIN
DINCK
PGMB
OEB
25
26
24
23
I/O
I
I
I
Program write enable pin. Active low.
Output enable pin. Active low.
4 •
Product Specification (V1.0) 07.26.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
