Rainbow-electronics T89C51AC2 Manual do Utilizador descarregar pdf (Página 76)

76

T89C51AC2

Rev. B – 19-Dec-01

Table 37. CCON Register

CCON (S:D8h)

PCA Counter Control Register

Reset Value = 00X0 0000b

76543210

CF CR - CCF4 CCF3 CCF2 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-

Reserved

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

4CCF4

PCA Module 4 Compare/Capture flag

Set by hardware when a match or capture occurs. This generates a PCA

interrupt request if the ECCF 4 bit in CCAPM 4 register is set.

Must be cleared by software.

3CCF3

PCA Module 3 Compare/Capture flag

Set by hardware when a match or capture occurs. This generates a PCA

interrupt request if the ECCF 3 bit in CCAPM 3 register is set.

Must be cleared by software.

2CCF2

PCA Module 2 Compare/Capture flag

Set by hardware when a match or capture occurs. This generates a PCA

interrupt request if the ECCF 2 bit in CCAPM 2 register is set.

Must be cleared by software.

1CCF1

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.

0CCF0

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 ... 71 72 73 74 75 76 77 78 79 80 81 ... 109 110

T89C51AC2 1

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