SM8952B

8-Bit Micro-controller

8KB Flash

& 256B RAM embedded

Specifications subject to change without notice contact your sales representatives for the most recent information.

ISSFD-M077

Ver D SM8952B 08/07/2015

- 10 -

Function Description

1.

General Features

SM8952B is an 8-bit micro-controller. All of its functions and the detailed meanings of SFR will be given in the

following sections.

1.1

Embedded Flash

The program can be loaded into the embedded 8KB Flash memory via its writer.

1.2

IO Pads

The SM8952B has Five I/O ports: Port 0, Port 1, Port 2, Port 3. Port 0~Port 3 are 8-bit ports. These are: quasi-

bidirectional (standard 8051 port outputs) with Port 1~3, and open drain with Port 0.

All the pads are with slew rate to reduce EMI. The IO pads can withstand ESD in human body mode guaranteeing

the SM8952B’s quality in high electro-static environments.

1.3

System Control Register (SCONF)

Mnemonic: SCONF

Address: BFh

7

6

5

4

3

2

1

0

Reset

WDR

-

-

-

-

-

-

ALEI

00H

WDR Watch Dog Timer Reset.

When system reset by Watch Dog Timer overflow, WDR will be set to 1.

User should check WDR bit whenever un-predicted reset happened.

ALEI ALE output inhibit bit.

When default, It can inhibit the clock signal in (Fosc/6) Hz output to the ALE pin.

When set to 1, the ALE pin output will stop to reduce EMI.