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參數(shù)資料
| 型號： | SST89E554A-40-I-TQJ |
| 廠商： | SILICON STORAGE TECHNOLOGY INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | MS-026ACB, TQFP-44 |
| 文件頁數(shù)： | 49/87頁 |
| 文件大?。?/td> | 996K |
| 代理商： | SST89E554A-40-I-TQJ |
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Preliminary Specifications
FlashFlex51 MCU
SST89E554A / SST89V554A
53
2003 Silicon Storage Technology, Inc.
S71228-00-000
6/03
8.3.1 Capture Mode
Capture mode is used to capture the PCA timer/counter
value into a module’s capture registers (CCAPnH and
CCAPnL). The capture will occur on a positive edge, nega-
tive edge, or both on the corresponding module’s pin. To
use one of the PCA modules in the capture mode, either
one or both the CCAPM bits CAPN and CAPP for that
module must be set. When a valid transition occurs on the
CEX pin corresponding to the module used, the PCA hard-
ware loads the 16-bit value of the PCA counter register (CH
and CL) into the module’s capture registers (CCAPnL and
CCAPnH). If the CCFn bit for the module in the CCON
SFR and the ECCFn bit in the CCAPMn SFR are set, then
an interrupt will be generated. In the interrupt service rou-
tine, the 16-bit capture value must be saved in RAM before
the next event capture occurs. If a subsequent capture
occurred, the original capture values would be lost. After
flag event flag has been set by hardware, the user must
clear the flag in software. (See Figure 8-2)
FIGURE
8-2: PCA CAPTURE MODE
1228 F23.0
CF
CR
CCF4
CCF3
CCF2
CCF1
CCF0
ECOMn CAPPn CAPNn
MATn
TOGn
PWMn ECCFn
CCON
CCAPMn
n=0 to 4
PCA Interrupt
CH
CL
CCAPnH
CCAPnL
PCA Timer/Counter
Capture
CEXn
00
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SST89E554RC | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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| SST89E554RC-25-C-PI | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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