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VOLTAGE LEVEL DETECTOR
VOLTAGE LEVEL DETECTOR CONTROL REGISTER (VLDCON)
The bit 2 of VLDCON controls to run or disable the operation of Voltage level detect. Basically this V
2.2 V by system reset and it can be changed in 4 kinds voltages by selecting Voltage Level Detect Control
register (VLDCON). When you write 2 bit data value to VLDCON, an established resistor string is selected and
the V
is fixed in accordance with this resistor. Table 18-1 shows specific V
VLD
Resistor String
V
BAT
NOTES:
1.
2.
18-2
MSB
.7
Not use
R
VLD
ExtRef
P2CONH.7-.6
The reset value of VLDCON is #00H.
V
is 1 volt.
REF
Figure 18-2. Voltage Level Detect Circuit and Control Register
Table 18-1. VLDCON Value and Detection Level
VLDCON .1–.0
0 0
0 1
1 0
1 1
Voltage Level Detect Control
F6H, Set 1, Bank 1, R/W, Reset : 00H
.6
.5
.4
V
IN
+
M
Comparator
V
REF
BANDGAP
V
VLD
2.2 V
2.4 V
3.0 V
4.0 V
S3C8248/C8245/P8245/C8247/C8249/P8249
of 4 levels.
VLD
.3
.2
.1
.0
VLD
OUT
Bias
VLD Enable/Disable
is set as
VLD
LSB
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