AT83C24 ATMEL Corporation, AT83C24 Datasheet - Page 27

• Manufacturer Part Number: AT83C24
• Description: Smart Card Reader Interface with Power Management
• Manufacturer: ATMEL Corporation

4234E–SCR–09/04
Table 12. STATUS (Status Byte)
Table 13. TIMER 1 (Timer MSB)
Reset value = 0x00000001
Bit Number
Number
Bit 15
CC8
7 - 0
Bit
7
7
7
6
5
4
3
2
1
0
Mnemonic Description
Bits 15 - 8 Timer MSB (bits 15 to 8)
Bit Mnemonic
Bit 14
VCARD_INT
VCARD_OK
CC4
Bit
6
6
CARDIN
CRST
CC8
CC4
CIO
X
CARDIN
Bit 13
5
5
Description
Card CC8
This bit provides the actual level on the CC8 pin when read.
The reset value is 0.
Card CC4
This bit provides the actual level on the CC4 pin when read.
The reset value is 0.
Card Presence Status
This bit is set when a card is detected.
It is cleared otherwise.
The reset value is 0.
This bit should not be set.
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.
Card RST
This bit provides the actual level on the CRST pin when read.
The reset value is 0.
Card I/O
This bit provides the actual level on the CIO pin when read.
The reset value is 0.
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.
VCARDOK
Bit 12
4
4
Bit 11
3
X
3
VCARD_INT
Bit 10
2
2
CRST
Bit 9
AT83C24
1
1
Bit 8
CIO
0
0
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