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AT89C5131A-RDTUM 데이터시트(PDF) 65 Page - ATMEL Corporation

부품명 AT89C5131A-RDTUM
상세설명  8-bit Flash Microcontroller with Full Speed USB Device
PDF  188 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTUM 데이터시트(HTML) 65 Page - ATMEL Corporation

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4337K–USB–04/08
AT89C5130A/31A-M
14.1
PCA Capture Mode
To use one of the PCA modules in the capture mode either one or both of the CCAPM bits
CAPN and CAPP for that module must be set. The external CEX input for the module (on port 1)
is sampled for a transition. When a valid transition occurs the PCA hardware loads the value of
the PCA counter registers (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 (see Figure 14-3).
Figure 14-3. PCA Capture Mode
14.2
16-bit Software Timer/Compare Mode
The PCA modules can be used as software timers by setting both the ECOM and MAT bits in
the modules CCAPMn register. The PCA timer will be compared to the module's capture regis-
ters 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 (see Figure 14-4).
CF
CR
CCON
0xD8
CH
CL
CCAPnH
CCAPnL
CCF4 CCF3 CCF2 CCF1 CCF0
PCA IT
PCA Counter/Timer
ECOMn
CCAPMn, n = 0 to 4
0xDA to 0xDE
CAPNn MATn TOGn PWMn ECCFn
CAPPn
Cex.n
Capture



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