AT83C26-ZTUL Atmel, AT83C26-ZTUL Datasheet - Page 22
AT83C26-ZTUL
Manufacturer Part Number
AT83C26-ZTUL
Description
IC SMART CARD READER 1/PM 48-QFN
Manufacturer
Atmel
Datasheet
1.AT83C26-ALTUL.pdf
(77 pages)
Specifications of AT83C26-ZTUL
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-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
For Use With
AT89STK-09 - EVAL BOARD FOR AT83C26
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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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
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