SC9308

HANGZHOU MICROELECTRONICS CO.,LTD

REV:1.1

2008.10.20

Http://www.silan.com.cn

Page 6 of 17

SHARED PIN DESCRIPTION

Pin no.

Shared pin

I/O

Descriptions

12

TXD

O

Serial communication data output

13

RXD

I

Serial communication data input

1-4

INT0-INT3

I

External interrupt input

5

TCL0

I

External counting pulse/clock input of timer 0

6

TCL1

I

External counting pulse/clock input of timer 1

8

BUZ

O

Buzzer signal output

9~11

KS0-KS2

I

Key scan input, can generate interrupt

12

TCLO0

O

Frequency division output of timer 0

13

TCLO1

O

Frequency division output of timer 1

16

VPP

－

High voltage pin, when download OTP, connects to 12V voltage

31~38

PE0~PE7

I/O

General purpose I/O port PORTE

39~44

PF0~PF5

I/O

General purpose I/O port PORTF

21

XIN4M

I

High frequency crystal input<ADC channel forbids>

22

XOUT4M

O

High frequency crystal output <ADC channel forbids>

FUNCTION DESCRIPTION

SC9308 has embedded SC65X core and 8K-byte OTP program memory, the data memory is 384-byte. Built-in

RC oscillator generates 3.2MHz clock frequency, and after 1/2,1/4 divided frequency, It can also be used as

system main clock together with external 75KHz crystal or extended high speed clock by PC4/5 to implement

applications in different modes, thus to maximize reduce the power consumption. The built-in counting circuit can

count the local oscillator signal frequency. In addition, it has three 8-bit counters T0/T1/T2. T0/T1 can be used

separately and also be used as 16-bit counter. The built-in RTC module can provides powerful calendar/alarm

functions, and provides 4 kinds of frequency BUZ signals. PA/B/C/E/F can provide max. 31 I/O ports, where

PA/B has pull-up configuration and selectable open-drain output function, PC can be shared as ADC analog pin

of ADC, PE/F can be used as LCD display data scan output. LCD driver can drive seven 8-segment display in

maximum, and bias voltage 1/3 and 1/2 are selectable, duty is 1/2, 1/3, 1/4 programmable control to meet the

various display requirements.

MCU Address Space

MCU uses 16-bit address bus, the maximum addressing space is 64-kByte (0000H~FFFFH). The address

assignment of memory space is as follows: