Rainbow-electronics AT83C24NDS Manual de usuario descargar pdf (Pagina 26)

4234F–SCR–10/05

AT83C24

Reset value = 0x00000001

Table 12. STATUS (Status Byte)

7 6 5 4 3 2 1 0

CC8 CC4 CARDIN VCARDOK X VCARD_INT CRST CIO

Bit Number Bit Mnemonic Description

7 CC8

Card CC8

This bit provides the actual level on the CC8 pin when read.

The reset value is 0.

6 CC4

Card CC4

This bit provides the actual level on the CC4 pin when read.

The reset value is 0.

5 CARDIN

Card Presence Status

This bit is set when a card is detected.

It is cleared otherwise.

4 VCARD_OK

Card Voltage Status

This bit is set by the DCDC when the output voltage remains within the

voltage range specified by VCARD[1:0] bits.

It is cleared otherwise.

The reset value is 0.

3 X This bit should not be set.

2 VCARD_INT

Card voltage interrupt

This bit is set when VCARD_OK bit is set.

This bit is cleared when read by the microcontroller.

The reset value is 0.

1 CRST

Card RST

This bit provides the actual level on the CRST pin when read.

The reset value is 0.

0 CIO

Card I/O

This bit provides the actual level on the CIO pin when read.

The reset value is 0.

Table 13. TIMER 1 (Timer MSB)

7 6 5 4 3 2 1 0

Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8

Bit

Number

Bit

Mnemonic

Description

7 - 0 Bits 15 - 8 Timer MSB (bits 15 to 8)

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 41 42

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Rainbow-electronics AT83C24NDS Manual de usuario Pagina 26

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