AT83C26-RKRUL Atmel, AT83C26-RKRUL Datasheet - Page 52
AT83C26-RKRUL
Manufacturer Part Number
AT83C26-RKRUL
Description
RFID Modules & Development Tools 3V Smart card reader
Manufacturer
Atmel
Datasheet
1.AT83C26-ALTUL.pdf
(77 pages)
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Table 31. SC5_CFG0()
52
Bit Number
VCARD_INT5
1-0
7
6
5
4
3
2
7
AT83C26
Bit Mnemonic
VCARD_INT5
VCARDERR5
VCARD_OK5
VCARD5[1:0]
ATRERR5
VCARD_OK5
X
X
Reset value = 0x 000X X000
6
Description
SC5 voltage interrupt
This bit is set when VCARD_OK5 bit is set.
This bit is cleared when read by the micro controller.
Answer to Reset Interrupt for SC5
This bit is set when the card clock counter overflows (no falling edge on CIO5 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.
can be set 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.
The reset value is 0.
VCRD5[1:0] = 00: 0V
VCRD5[1:0] = 01: 1.8V class C
VCRD5[1:0] = 10: 3V class B
VCRD5[1:0] = 11: 5V class A
No card deactivation is performed when the voltage is changed. The micro controller should deactivate the
card before changing the voltage and activating the card again.
The reset value is 00.
SC5 Voltage Status
This bit is set by the LDO5 when the output voltage remains within the voltage range specified by
VCARD5[1:0] bits.
It is cleared otherwise.
Interface 5 Card Out of Range Voltage Interrupt
This bit is set when the output voltage on CVCC
Interface 5 Card Voltage Selection
ATRERR5
5
4
X
X
3
N
goes out of the voltage range specified by VCRDN field. It
VCARDERR5
2
VCARD51
1
7511D–SCR–02/07
VCARD50
0
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