參數(shù)資料
型號(hào): W78ERD2A40DL
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDIP40
封裝: ROHS COMPLIANT, DIP-40
文件頁(yè)數(shù): 47/76頁(yè)
文件大?。?/td> 650K
代理商: W78ERD2A40DL
W78ERD2/W78ERD2A
Publication Release Date: February 14, 2007
- 47 -
Revision A10
flags for the modules and are set by hardware when either a match or a capture occurs. These flags
can only be cleared by software.
The next five sections provide more information about each of the five modes (four modes for all
registers and the watchdog timer in module 4).
11.1 PCA Capture Mode
To use one of the PCA modules in capture mode, either one or both of the CCAPM bits CAPN and
CAPP for that module must be set.
CF
CCF0
CCF1
CCF2
CCF3
CCF4
-
CR
CCON(D8H)
CEXn
CH
CL
CCAPnH
CCAPnL
-
ECCFn
PWMn
TOGn
MATn
CAPNn
CAPPn
ECOMn
CCAPMn, n=0~4
(DAH~DEH)
PCA Timer/Counter
PCA INTERRUPT
0
0
0
0
Capture
To CCFn
Figure 11-2 PCA Capture Mode
In capture mode, the external CEX
n
input 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 (CCAPnH and CCAPnL). If the CCFn (CCON) and ECCFn (CCAPMn) bits are set, then an
interrupt is generated.
11.2 16-bit Software Timer Comparator Mode
The PCA modules can be used as software timers by setting both the ECOM and MAT bits in the
CCAPMn register.
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