AT83C26-RKRUL Atmel, AT83C26-RKRUL Datasheet - Page 42

• Manufacturer Part Number: AT83C26-RKRUL
• Description: RFID Modules & Development Tools 3V Smart card reader
• Manufacturer: Atmel

Table 22. SC1_INTERFACE (Interface Byte for SC1)
42
7
0
Bit Number
6-5
AT83C26
4
3
2
1
0
IODIS1
6
DEMBOOSTA[1-0]
CKSTOP1
Reset value = 0x X000 0000
Bit Mnemonic
INT_PULLUP
CRST_SEL1
STEPREGA
5
X
X
CARDRST1
Description
DC/DC A Maximum Startup Current drawn from power supply
00: Normal: 80 mA average
01: Normal + 18%
10: Normal + 18% (and boost on oscillator)
11: Normal + 40%
Step Regulator mode
Clear this bit to enable the automatic step-up converter (CVCC is stable even if VCC is not
higher than CVCC).
Set this bit to permanently disable the step-up converter (CVCC is stable only if VCC is
sufficiently higher than CVCC).
This bit must always be set if no external self is used
Internal pull-up
Set this bit to activate the internal pull-up (connected internally to VCC) on INT pin.
Clear this bit to deactivate the internal pull-up.
Card Reset Selection
Set this bit to have the CRST1 pin driven by hardware through the A1/RST pin.
Clear this bit to have the CRST1 pin driven by software through the CARDRST bit.
The reset value is 0.
4
CARDC81
3
CARDC41
2
CARDCK1
1
7511D–SCR–02/07
CARDIO1
0