83C576 查看數據表（PDF） - Philips Electronics

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83C576

80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer

Philips Electronics 

Philips Semiconductors

80C51 8-bit microcontroller family

8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators,

failure detect circuitry, watchdog timer

Product specification

83C576/87C576

CCAPMn Address

CCAPM0

CCAPM1

CCAPM2

CCAPM3

CCAPM4

Not Bit Addressable

0DAH

0DBH

0DCH

0DDH

0DEH

Reset Value = X000 0000B

Symbol

–

ECOMn

CAPPn

CAPNn

MATn

TOGn

PWMn

ECCFn

–

ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn

Bit:

7

6

5

4

3

2

1

0

Function

Not implemented, reserved for future use*.

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.

NOTE:

*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.

SU00037

Figure 7. CCAPMn: PCA Modules Compare/Capture Registers

–

ECOMn CAPPn CAPNn MATn TOGn PWMn ECCFn

MODULE FUNCTION

X

0

0

0

0

0

0

0

No operation

X

X

1

0

0

0

0

X

16-bit capture by a positive-edge trigger on CEXn

X

X

0

1

0

0

0

X

16-bit capture by a negative trigger on CEXn

X

X

1

1

0

0

0

X

16-bit capture by a transition on CEXn

X

1

0

0

1

0

0

X

16-bit Software Timer

X

1

0

0

1

1

0

X

16-bit High Speed Output

X

1

0

0

0

0

1

0

8-bit PWM

X

1

0

0

1

X

0

X

Watchdog Timer

Figure 8. PCA Module Modes (CCAPMn Register)

1998 Jun 04

14

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