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AT89C51RB2-3CSIM датащи(PDF) 39 Page - ATMEL Corporation

номер детали AT89C51RB2-3CSIM
подробное описание детали  Microcontroller with 16K/32K Bytes Flash
PDF  127 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51RB2-3CSIM датащи(HTML) 39 Page - ATMEL Corporation

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AT89C51RB2/RC2
4180C–8051–12/03
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 Mod-
ule (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 13).
Figure 13. PCA Capture Mode
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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