TS80C51RA2-ECAB 查看數據表（PDF） - Atmel Corporation

零件编号

产品描述 (功能)

生产厂家

TS80C51RA2-ECAB

High Performance 8-bit Microcontrollers

Atmel Corporation 

TS80C51RA2/RD2

TS83C51RB2/RC2/RD2

TS87C51RB2/RC2/RD2

Table 10. CCAPMn: PCA Modules Compare/Capture Control Registers

CCAPMn Address

n=0-4

CCAPM0=0DAH

CCAPM1=0DBH

CCAPM2=0DCH

CCAPM3=0DDH

CCAPM4=0DEH

Reset value

- ECOMn CAPPn CAPNn MATn TOGn PWMm ECCFn

X

0

0

0

0

0

0

0

Symbol

-

ECOMn

CAPPn

CAPNn

MATn

TOGn

PWMn

ECCFn

Function

Not implemented, reserved for future use.a

Enable Comparator. ECOMn = 1 enables the comparator function.

Capture Positive, CAPPn = 1 enables positive edge capture.

Capture Negative, CAPNn = 1 enables negative edge capture.

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.

Toggle. When TOGn = 1, a match of the PCA counter with this module's compare/capture

register causes the CEXn pin to toggle.

Pulse Width Modulation Mode. PWMn = 1 enables the CEXn pin to be used as a pulse width

modulated output.

Enable CCF interrupt. Enables compare/capture flag CCFn in the CCON register to generate

an interrupt.

a. 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.

Table 11. 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 12 & Table 13)

28

Rev. C - 06 March, 2001

Share Link: