Rainbow-electronics T89C51CC02 Bedienungsanleitung PDF herunterladen (Seite 119)

Rev.A - May 17, 2001 119

Preliminary

T89C51CC02

17.9. Registers

ADCF (S:F6h)

ADC Configuration

Reset Value=0000 0000b

Figure 121. ADCF Register

ADCON (S:F3h)

ADC Control Register

Reset Value=X000 0000b

Figure 122. ADCON Register

7 6 5 4 3 2 1 0

CH 7 CH 6 CH 5 CH 4 CH 3 CH 2 CH 1 CH 0

Bit Number

Bit

Mnemonic

Description

7-0 CH 0:7

Channel Configuration

Set to use P1.x as ADC input.

Clear tu use P1.x as standart I/O port.

7 6 5 4 3 2 1 0

- PSIDLE ADEN ADEOC ADSST SCH2 SCH1 SCH0

Bit Number Bit Mnemonic Description

6 PSIDLE

Pseudo Idle mode (best precision)

Set to put in idle mode during conversion

Clear to converte without idle mode.

5 ADEN

Enable/Standby Mode

Set to enable ADC

Clear for Standby mode (power dissipation 1 uW).

4 ADEOC

End Of Conversion

Set by hardware when ADC result is ready to be read. This flag can generate an interrupt.

Must be cleared by software.

3 ADSST

Start and Status

Set to start an A/D conversion.

Cleared by hardware after completion of the conversion

2-0 SCH2:0

Selection of channel to convert

see Table 22

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 136 137

T89C51CC02 1

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