AT83C26-RKRUL Atmel, AT83C26-RKRUL Datasheet - Page 22
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)
- Current page: 22 of 77
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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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