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參數(shù)資料
| 型號(hào)： | SM8952A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8 - Bit Micro-controller with 4/8KB flash embedded |
| 中文描述： | 8 -位微控制器與4/8KB嵌入式閃存 |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 413K |
| 代理商： | SM8952A |
September 2002
Specifications subject to change without notice,contact your sales representatives for the most recent information.
5/17
Preliminary
Ver 0.2
PID 8951A/8952A 09/02
SyncMOS Technologies Inc. SM8951A/8952A
Preliminary
The SM8951A/8952A WDT has selectable divider input for the time base source clock. To select the divider input, the set-
ting of bit2~bit0 (PS2~PS0) OF Watch Dog Timer Control Register (WDTC) should be set accordingly.
DONOTCOPY
WDTE bit will be cleared to 0 automatically when SM8951A8952A been reset, either hardware reset or WDT reset.
B
ACC
PSW
T2CON
RC2L
RC2H
TL2
TH2
IP
SCONF
P3
IE
P2
SCON
SBUF
WDTC
P1
TCON
TMOD
TL0
TL1
TH0
TH1
P0
SP
DPL
DPH
(Reserved)
PCON
SFR Memory MAP
$F8
$F0
$E8
$E0
$D8
$D0
$C8
$C0
$B8
$B0
$A8
$A0
$98
$90
$88
$80
$FF
$F7
$EF
$E7
$DF
$D7
$CF
$C7
$BF
$B7
$AF
$A7
$9F
$97
$8F
$87
Note: The text of SFRs with bold type characters are Extension Special Function Registers for
SM8951A/8952A
Extension Function Description
Watch Dog Timer
The Watch Dog Timer (WDT) is a 16-bit free-running counter that generate reset signal if the counter overflows. The WDT
is useful for systems which are susceptible to noise, power glitches, or electronics discharge which causing software dead
loop or runaway. The WDT function can help user software recover form abnormal software condition. The WDT is different
from Timer0, Timer1 and Timer2 of general 8052. To prevent a WDT reset can be done by software periodically clearing
the WDT counter.
To enable the WDT is done by setting 1 to the bit 7 (WDTE) of WDTC. After WDTE set to 1, the 16-bit counter starts to
count with the selected time base source clock which set by PS2~PS0. It will generate a reset signal when overflows. The
To reset the WDT is done by setting 1 to the bit 5 (CLEAR) of WDTC. This will clear the content of the 16-bit counter and let
the counter re-start to count from the beginning.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SM8958A | 8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
| SM8958AC25 | 8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
| SM8958AC40 | 8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
| SM8958AL25 | 8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
| SM8958C25 | 8-bit Micro-controller with 32K Flash embedded |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM8952AC25 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 4/8KB flash embedded |
| SM8952AC40 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 4/8KB flash embedded |
| SM8952AL25 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 4/8KB flash embedded |
| SM8952BW40PP | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:SM8952B 8-Bit Micro-controller 8KB Flash & 256B RAM embedded |
| SM8952BW44JP | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:SM8952B 8-Bit Micro-controller 8KB Flash & 256B RAM embedded |
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