Rainbow-electronics T89C51CC02 Uživatelský manuál stáhnout pdf (Strana 110)

110 Rev.A - May 17, 2001

Preliminary

T89C51CC02

CCON (S:D8h)

PCA Counter Control Register

Reset Value = 00xx xx00b

Figure 111. CCON Register

7 6 5 4 3 2 1 0

CF CR - CCF1 CCF0

Bit Number Bit Mnemonic Description

7CF

PCA Timer/Counter Overflow flag

Set by hardware when the PCA Timer/Counter rolls over. This generates a PCA interrupt request if

the ECF bit in CMOD register is set.

Must be cleared by software.

6CR

PCA Timer/Counter Run Control bit

Clear to turn the PCA Timer/Counter off.

Set to turn the PCA Timer/Counter on.

5-2 -

Reserved

The value read from these bits are indeterminate. Do not set these bits.

1 CCF1

PCA Module 1 Compare/Capture flag

Set by hardware when a match or capture occurs. This generates a PCA interrupt request if the ECCF

1 bit in CCAPM 1 register is set.

Must be cleared by software.

0 CCF0

PCA Module 0 Compare/Capture flag

Set by hardware when a match or capture occurs. This generates a PCA interrupt request if the ECCF

0 bit in CCAPM 0 register is set.

Must be cleared by software.

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 136 137

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Rainbow-electronics T89C51CC02 Uživatelský manuál Strana 110