Rainbow-electronics T89C51CC01 Bedienungsanleitung PDF herunterladen (Seite 114)

114

T89C51CC01

Rev. D – 17-Dec-01

16.9 PCA Registers Table 79. CMOD Register

CMOD (S:D8h)

PCA Counter Mode Register

Reset Value = 00XX X000b

76543210

CIDL WDTE - - - CPS1 CPS0 ECF

Bit

Number

Bit

Mnemonic Description

7CIDL

PCA Counter Idle Control bit

CleartoletthePCArunduringIdlemode.

SettostopthePCAwhenIdlemodeisinvoked.

6WDTE

Watchdog Timer Enable

Clear to disable Watchdog Timer function on PCA Module 4,

Set to enable it.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

2CPS1

EWC Count Pulse Select bits

CPS1

CPS0 Clock source

0 0 Internal Clock, FPca/6

0 1 Internal Clock, FPca/2

1 0 Timer 0 overflow

1 1 External clock at ECI/P1.2 pin (Max. Rate = FPca/4)

1CPS0

0ECF

Enable PCA Counter Overflow Interrupt bit

Clear to disable CF bit in CCON register to generate an interrupt.

Set to enable CF bit in CCON register to generate an interrupt.

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 148 149

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Rainbow-electronics T89C51CC01 Bedienungsanleitung Seite 114