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BATTERY LEVEL DETECTOR
S3CC11B/FC11B
BATTERY LEVEL DETECTOR CONTROL REGISTER (BLDCON)
The bit 0 of BLDCON controls to run or disable the operation of battery level detect. Basically this VBLD is set as
invalid by system reset and it can be changed in 2 kinds voltages by selecting Battery Level Detect Control register
(BLDCON). When you write 3-bit data value to BLDCON, an established resistor string is selected and the VBLD is
fixed in accordance with this resistor. Table 16-1 shows specific VBLD of 2 levels.
Battery Level Detector Control Register (BLDCON)
74H, R/W, Reset: 00H
Resistor String
MSB
.7
.6
.5
.4
.3
.2
.1
.0
Not used
RVLD
VIN
Comparator
BLD OUT
VREF
Bias
BANDGAP
BLD Enable/Disable
NOTES:
1. The reset value of BLDCON is #00H.
2. VREF is about 1 volt.
Figure 19-2. Battery Level Detector Circuit and Control Register
Table 19-1. BLDCON Value and Detection Level
19-2
VLDCON .4–.2
VBLD
0 0 0
–
0 0 1
2.45 V
1 1 1
2.70 V
LSB