Rainbow Electronics AT83C24NDS - Manual (Page 26)

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)