em78p809n ELAN Microelectronics Corp, em78p809n Datasheet - Page 8

• Manufacturer Part Number: em78p809n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

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