AT89C51IC2-RLTIM ATMEL [ATMEL Corporation], AT89C51IC2-RLTIM Datasheet - Page 41
AT89C51IC2-RLTIM
Manufacturer Part Number
AT89C51IC2-RLTIM
Description
8-bit Flash Microcontroller with 2-wire Interface
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89C51IC2-RLTIM.pdf
(147 pages)
- Current page: 41 of 147
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4301C–8051–06/06
Table 29. PCA Module Modes (CCAPMn Registers)
There are two additional registers associated with each of the PCA modules. They are
CCAPnH and CCAPnL and these are the registers that store the 16-bit count when a
capture occurs or a compare should occur. When a module is used in the PWM mode
these registers are used to control the duty cycle of the output (See Table 30 &
Table 31).
Table 30. CCAPnH Registers (n = 0-4)
CCAP0H - PCA Module 0 Compare/Capture Control Register High (0FAh)
CCAP1H - PCA Module 1 Compare/Capture Control Register High (0FBh)
CCAP2H - PCA Module 2 Compare/Capture Control Register High (0FCh)
CCAP3H - PCA Module 3 Compare/Capture Control Register High (0FDh)
CCAP4H - PCA Module 4 Compare/Capture Control Register High (0FEh)
Reset Value = 0000 0000b
Not bit addressable
ECOMn
Number
X
X
X
0
1
1
1
1
Bit
7-0
7
-
CAPPn
0
1
0
1
0
0
0
0
Mnemonic Description
Bit
6
-
-
CAPNn
0
0
1
1
0
0
0
0
PCA Module n Compare/Capture Control
CCAPnH Value
MATn
5
-
0
0
0
0
1
1
0
1
TOGn
X
0
0
0
0
0
1
0
4
-
PWMm
0
0
0
0
0
0
1
0
3
-
ECCFn Module Function
X
X
X
X
X
X
0
0
trigger on CEXn
on CEXn
CEXn
mode.
No Operation
16-bit capture by a positive-edge
16-bit capture by a negative trigger
16-bit capture by a transition on
16-bit Software Timer / Compare
16-bit High Speed Output
8-bit PWM
Watchdog Timer (module 4 only)
2
-
AT89C51IC2
1
-
0
-
41
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