Battery Level Detector Control Register (Bldcon); Battery Level Detect Circuit And Control Register; Bldcon Value And Detection Level - Samsung S3C8275X User Manual

BATTERY LEVEL DETECTOR

BATTERY LEVEL DETECTOR CONTROL REGISTER (BLDCON)

The bit 3 of BLDCON controls to run or disable the operation of Battery Level Detector. Basically this V
as 2.2V by system reset and it can be changed in 3 kinds voltages by selecting Battery Level Detector Control
Register (BLDCON). When you write 3-bit data value to BLDCON, an established resistor string is selected and
the V is fixed in accordance with this resistor. Table 15-1 shows specific V
BLD
Resistor String
V
BAT
NOTES:
1.
2.
15-2
MSB .7
Not used
R
BLD
V
BLDREF
P2CONL.1-.0
The reset value of BLDCON is #00H.
V is about 1 volt.
REF
Figure 15-2. Battery Level Detect Circuit and Control Register
Table 15-1. BLDCON Value and Detection Level
BLDCON .2−.0
0 0 0
1 0 1
0 1 1
Other values
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
Battery Level Detector Control Register
F4H, Set 1, Bank 1, R/W, Reset : 00H
.6 .5 .4
V
IN
+
Mux
Comparator
V
REF
BANDGAP
V
BLD
2.2 V
2.4 V
2.8 V
Not available
of 3 levels.
BLD
.3 .2 .1 .0
BLD
OUT
Bias
f
BLD
BLD Enable/Disable
is set
BLD
LSB