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參數(shù)資料
| 型號： | SST89V554A-33-C-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, 33 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | MS-026ACB, TQFP-44 |
| 文件頁數(shù)： | 50/87頁 |
| 文件大小： | 996K |
| 代理商： | SST89V554A-33-C-TQJ |
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54
Preliminary Specifications
FlashFlex51 MCU
SST89E554A / SST89V554A
2003 Silicon Storage Technology, Inc.
S71228-00-000
6/03
8.3.2 16-Bit Software Timer Mode
The 16-bit software timer mode is used to trigger interrupt
routines, which must occur at periodic intervals. It is setup
by setting both the ECOM and MAT bits in the module’s
CCAPMn register. The PCA timer will be compared to the
module’s capture registers (CCAPnL and CCAPnH) and
when a match occurs, an interrupt will occur, if the CCFn
(CCON SFR) and the ECCFn (CCAPMn SFR) bits for the
module are both set.
If necessary, a new 16-bit compare value can be loaded
into CCAPnH and CCAPnL during the interrupt routine.
The user should be aware that the hardware temporarily
disables the comparator function while these registers are
being updated so that an invalid match will not occur. Thus,
it is recommended that the user write to the low byte first
(CCAPnL) to disable the comparator, then write to the high
byte (CCAPnH) to re-enable it. If any updates to the regis-
ters are done, the user may want to hold off any interrupts
from occurring by clearing the EA bit. (See Figure 8-3)
FIGURE
8-3: PCA COMPARE MODE (SOFTWARE TIMER)
1228 F24.0
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
0
00
0
16-bit Comparator
Reset
Write to
CCAPnL
Write to
CCAPnH
10
Enable
Match
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SST89V554RC | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554RC-25-C-NI | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554RC-25-C-NJ | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554RC-25-C-PI | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89V554RC-25-C-PJ | 制造商:SST 制造商全稱:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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