at83c26 ATMEL Corporation, at83c26 Datasheet - Page 38

• Manufacturer Part Number: at83c26
• Description: Multiple Smart Card Reader Interface With Power Management
• Manufacturer: ATMEL Corporation

Registers
Table 17. SC1_ CFG0(Config Byte 0 for SC1)
Table 18. SC1_CFG1 (Config Byte 1 for SC1
38
Bit Number
7
1
7-6
1-0
7
X
5
4
3
2
AT83C26
6
0
Bit Mnemonic
VCARDERR1
VCARD1[1:0]
ICARDERR1
ART1
ATRERR1
INSERT1
6
1-0
Reset value = 0x 1000 0000
ATRERR1
5
SHUTDOWNA
Description
These bits cannot be programmed and are read as 1-0.
Answer to Reset Interrupt for SC1
This bit is set when the card clock counter overflows (no falling edge on CIO1 is received before the overflow
of the card clock counter).
This bit is cleared by hardware when this register is read. It can be set by software for test purpose.
Card Insertion Interrupt
This bit is set when a card is inserted or extracted: a change in CARDIN value filtered according to CDS[2-0].
It can be set by software for test purpose.
This bit is cleared by hardware when this register is read. It cannot be cleared by software.
deactivation is performed).
This bit is cleared by hardware when this register is read. It cannot be cleared by software.
by software for test purpose and deactivate the card.
This bit is cleared by hardware when this register is read. It cannot be cleared by software.
VCARD1[1:0] = 00: 0V
VCARD1[1:0] = 01: 1.8V
VCARD1[1:0] = 10: 3V
VCARD1[1:0] = 11: 5V
VCARD1[1:0] writing to 1.8V, 3V, 5V starts the DC/DC if a card is detected.
VCARD1[1:0] writing to 0 stops the DC/DC.
No card deactivation is performed when the voltage is changed between 1.8V, 3V or 5V. The micro controller
should deactivate the card before changing the voltage.
Card Over Current Interrupt
This bit is set when an over current is detected on CVCC. It can be set by software for test purpose (no card
Card Out of Range Voltage Interrupt
This bit is set when the output voltage goes out of the voltage range specified by VCARD field. It can be set
Card Voltage Selection
5
INSERT1
4
CARDDET1
4
ICARDERR1
3
PULLUP1
3
VCARDERR1
2
CDS12
2
VCARD11
CDS11
1
1
7511D–SCR–02/07
VCARD10
CDS10
0
0