EM78P809N
8-Bit Microcontroller
3 Pin Assignment
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
(ACLK) OSCO
VDD
2
OSCI
TEST
(AD0) P90
(AD1) P91
(AD2) P92
(AD3) P93
(AD4) P94
(AD5) P95
(AD6) P96
/RESET (VPP)
P67 (DINCK)
P66 (DATAIN)
P65 (PGMB)
P64 (/SS)(OEB)
P63 (/TONE)
P62 (TC2)
P61 (INT1)
P60 (/INT0)
P73 (/SLEEP, /INT5)
3
4
5
6
7
8
9
10
11
12
13
14
(AD7/VREF) P97
(TC3, INT3) P80
(TC4, /PWM, /PDO) P81
VSS
P72 (TX,SO)
P71(RX,SI)
P70 (/SCK)
EM78P809N
Fig. 1. Pin Assignment
4 Pin Description
Table 1
Symbol Pin No.
Type
Function
VDD
28
-
* Power supply
* Crystal type: Crystal input terminal
* RC type: RC oscillator input pin
OSCI
2
I
* Crystal type: Output terminal for crystal oscillator
* RC type: Instruction clock output
* External clock signal input
OSCO
1
I/O
I
* Input pin with Schmitt trigger. If this pin remains at logic low, the
controller will also remain in reset condition.
/RESET
27
* P60~P67 are bi-directional I/O pins
* P60 can be used as external interrupt 0 (/INT0)
* P61 can be used as external interrupt 1 (INT1)
* P62 can be used as 16-bit Timer/Counter 2 (TC2)
* P63 can be used as divider output (/TONE)
* P64 slave mode enable (/SS)
P60~P67
19~26
I/O
* P60 ~ P63 can be used as pull high or pull low pins
* P70~P77 are bi-directional I/O pins
* P70 can be used as SPI serial clock input/output (/SCK)
* P71 can be used as SPI serial data input (SI) or UART data receive
input (RX)
P70~P73
15~18
I/O
* P72 can be used as SPI serial data output (SO) or UART data
transmit output (TX)
* P73 can be used as SLEEP mode release input (/SLEEP) or external
interrupt input 5 (/INT5)
* P70 ~ P73 can be used as pull high or pull low pins
Product Specification (V1.0) 07.26.2005
• 3
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
