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SM5953 Fiches technique(PDF) 11 Page - SyncMOS Technologies,Inc

No de pièce SM5953
Description  Six interrupt sources with two priority levels
Download  43 Pages
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Fabricant  SYNCMOS [SyncMOS Technologies,Inc]
Site Internet  http://www.syncmos.com.tw
Logo SYNCMOS - SyncMOS Technologies,Inc

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SM5953
8-Bit Micro-controller
15KB with ISP Flash
& 256B RAM embedded
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M074
Ver D SM5953 04/16/2015
- 10 -
Function Description
1.
General Features
SM5953 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 15KB Flash memory via its writer or In-System Programming (ISP).
The high-quality Flash suitable for re-programming and data recording as EEPROM.
1.2
IO Pads
The SM5953 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 SM5953’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
-
-
-
-
ISPE
-
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.
ISPE ISP function enable bit.
When Enable the ISP function, ISPE will be set to 1.
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.


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