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AT80C51RA2-RLSIV 数据表(PDF) 28 Page - ATMEL Corporation

部件名 AT80C51RA2-RLSIV
功能描述  High Performance 8-bit Microcontroller
PDF  86 Pages
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制造商  ATMEL [ATMEL Corporation]
网页  http://www.atmel.com
标志 ATMEL - ATMEL Corporation

AT80C51RA2-RLSIV 数据表(HTML) 28 Page - ATMEL Corporation

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4188F–8051–01/08
AT/TS8xC51Rx2
• The last bit in the register ECOM (CCAPMn.6) when set enables the comparator function.
Table 6-7 shows the CCAPMn settings for the various PCA functions.
.
Table 6-6.
CCAPMn: PCA Modules Compare/Capture Control Registers
Table 6-7.
PCA Module Modes (CCAPMn Registers)
CCAPMn Address
n = 0 - 4
CCAPM0=0DAH
CCAPM1=0DBH
CCAPM2=0DCH
CCAPM3=0DDH
CCAPM4=0DEH
-
ECOMn CAPPn CAPNn
MATn
TOGn
PWMm ECCFn
Reset value
X
0
0
0
0
0
0
0
Symbol
Function
-
Not implemented, reserved for future use. (1)
1.
User software should not write 1s to reserved bits. These bits may be used in future 8051 family
products to invoke new features. In that case, the reset or inactive value of the new bit will be 0,
and its active value will be 1. The value read from a reserved bit is indeterminate.
ECOMn
Enable Comparator. ECOMn = 1 enables the comparator function.
CAPPn
Capture Positive, CAPPn = 1 enables positive edge capture.
CAPNn
Capture Negative, CAPNn = 1 enables negative edge capture.
MATn
Match. When MATn = 1, a match of the PCA counter with this module's compare/capture register
causes the CCFn bit in CCON to be set, flagging an interrupt.
TOGn
Toggle. When TOGn = 1, a match of the PCA counter with this module's compare/capture register
causes the CEXn pin to toggle.
PWMn
Pulse Width Modulation Mode. PWMn = 1 enables the CEXn pin to be used as a pulse width
modulated output.
ECCFn
Enable CCF interrupt. Enables compare/capture flag CCFn in the CCON register to generate an
interrupt.
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMm
ECCFn
Module Function
0
0
0
0
0
0
0
No Operation
X
1
0
0
0
0
X
16-bit capture by a positive-edge trigger
on CEXn
X
0
1
0
0
0
X
16-bit capture by a negative trigger on
CEXn
X
1
1
0
0
0
X
16-bit capture by a transition on CEXn
1
0
0
1
0
0
X
16-bit Software Timer / Compare mode.
1
0
0
1
1
0
X
16-bit High Speed Output
1
0
0
0
0
1
0
8-bit PWM
1
0
0
1
X
0
X
Watchdog Timer (module 4 only)



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