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參數(shù)資料
| 型號： | SM8958A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
| 中文描述： | 8 -位微控制器，32KB閃存 |
| 文件頁數(shù)： | 14/25頁 |
| 文件大?。?/td> | 509K |
| 代理商： | SM8958A |
September 2002
Specifications subject to change without notice,contact your sales representatives for the most recent information.
14/25
Ver 1.0
PID 8958A 09/02
SyncMOS Technologies Inc. SM8958A
Example of SPWM timing diagram:
MOV SPWMC , #03H ; Set output frequency (Divider = 16)
MOV SPWMD0 , #83H ; SPWMD0[4:0]=10h (=16T high, 16T low), BRM[2:0] = 3
MOV P1CON , #08H ; Enable P1.3 as SPWM output pin
16T
16T
16T
16T
16T
16T
16T
16T
32T
32T
32T
32T
32T
32T
32T
32T
1st cycle frame 2nd cycle frame 3rd cycle frame
4th cycle frame 5th cycle frame
6th cycle frame
7th cycle frame
8th cycle frame
1T
(narrow pulse inserted by BRM0[2:0] setting, here BRM0[2:0]=3)
1T
1T
SPWM clock = 1 / T = Fosc / 2^(SPFS[1:0]+1)
The SPWM output cycle frame frequency = SPWM clock / 32 = [Fosc/2^(SPFS[1:0]+1)]/32
If user use Fosc=20MHz, SPFS[1:0] of SPWMC=#03H, then
SPWM clock = 20MHz/2^4 = 20MHz/16 = 1.25MHz
SPWM output cycle frame frequency = (20MHz/2^4)/32=39.1KHz
N = BRM[2:0]
000
001
010
011
100
101
110
111
Number of SPWM cycles inserted in an 8-cycle frame
0
1
2
3
4
5
6
7
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| SM8958AC25 | 8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
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相關代理商/技術參數(shù) |
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|---|---|
| SM8958A_06 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 32KB flash & 1KB RAM embedded |
| SM8958AC25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 - Bit Micro-controller with 32KB flash & 1KB RAM embedded |
| SM8958AC40 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 32KB flash & 1KB RAM embedded |
| SM8958AL25 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 32KB flash & 1KB RAM embedded |
| SM8958AL33 | 制造商:SYNCMOS 制造商全稱:SYNCMOS 功能描述:8-Bits Micro-controller With 32KB flash & 1KB RAM embedded |
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