AT83C26-ALRUL Atmel, AT83C26-ALRUL Datasheet - Page 22

• Manufacturer Part Number: AT83C26-ALRUL
• Description: IC SMART CARD READER 1/PM 48VQFP
• Manufacturer: Atmel

Specifications of AT83C26-ALRUL

• Controller Type: Smart Card Reader Interface
• Interface: 2-Wire
• Voltage - Supply: 3 V ~ 5.5 V
• Current - Supply: 65mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• For Use With: AT89STK-09 - EVAL BOARD FOR AT83C26
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Initialization Procedure for DC/DC B converter
22
AT83C26
The DC/DCB sensitivity to any overflow current can be modified (20%) by using the ICCADJB bit
(DC/DCB register).
The initialization procedure is described in flow chart:
•
•
•
Figure 10. DC/DC B Converter Initialization Procedure
Increment of DEMBOOSTB[1:0] bits increases at the same time the current overflow level in the
same proportion as the startup current. So once the DC/DC B converter is ready it advised to
decrement the DEMBOOSTB[1:0] bits to restore the overflow current to its normal or desired
value.
Select the DC/DC B level by means of bits VDCB[1:0] in DCDCB register,
Set bits DEMBOOSTB[1:0] in INTERFACEB register following the current level control
wanted.
Monitor VDCB_OK bit in DCDCB register in order to know when the DC/DC B Converter is
ready
DEMBOOSTB[1:0]
Increment
DEMBOOSTB[1:0]=[0:0]
Set Time-out to 3 ms
DC/DC B Converter
Initialization Failure
DEMBOOSTB[1:0]
is at Maximum?
VDCB_OK=1
Time-out
Expired
END
(ready to start LDO)
DEMBOOSTB[1:0]
current overflow
to adjust the
Decrement
END
7511D–SCR–02/07