AT83C51RB2-3CSCM 查看數據表（PDF） - Atmel Corporation
零件编号
产品描述 (功能)
生产厂家
AT83C51RB2-3CSCM Datasheet PDF : 83 Pages
| |||
AT80C51RD2/AT83C51Rx2
Table 14. PCA Module Modes (CCAPMn Registers)
ECOMn CAPPn CAPNn MATn
0
0
0
0
X
1
0
0
X
0
1
0
X
1
1
0
1
0
0
1
1
0
0
1
1
0
0
0
1
0
0
1
TOGn PWMm ECCFn Module Function
0
0
0 No Operation
0
0
X
16-bit capture by a positive-edge
trigger on CEXn
0
0
X
16-bit capture by a negative trigger
on CEXn
0
0
X
16-bit capture by a transition on
CEXn
0
0
X
16-bit Software Timer/Compare
mode.
1
0
X 16-bit High-speed Output
0
1
0 8-bit PWM
X
0
X Watchdog Timer (module 4 only)
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 15 and
Table 16).
Table 15. 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)
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
Bit
Number
7-0
Bit
Mnemonic Description
-
PCA Module n Compare/Capture Control
CCAPnH Value
Reset Value = 0000 0000b
Not bit addressable
29
4113B–8051–03/05
Share Link: 