ACT8740
Rev PrB, 25-Feb-08
LOW-NOISE, LOW-DROPOUT, LINEAR REGULATORS
REGISTER DESCRIPTIONS
Note: See Table 1 for default register settings.
Table 8:
CFG Control Register Map
DATA
ADDRESS
D7
R
D6
R
D5
D4
D3
D2
D1
D0
40h
41h
42h
43h
ON3
ON4
ON5
OK3
VSET3
VSET4
VSET5
DIS3
R
R
R
R
OK5
OK4
DIS5
DIS4
W/E
R
R: Read-Only bits. Default Values May Vary.
W/E: Write-Exact bits. Read/Write bits which must be written exactly as specified in Table 1.
Table 9:
REG345 Control Register Bit Descriptions
ADDRESS
NAME
BIT
ACCESS
FUNCTION
DESCRIPTION
REG3 Output Voltage
Selection
40h
VSET3
[4:0]
R/W
See Table 10
0
1
REG3 Disable
REG3 Enable
40h
ON3
[5]
R/W
REG3 Enable
40h
41h
[7:6]
[4:0]
R
READ ONLY
See Table 10
REG4 Output Voltage
Selection
VSET4
ON4
R/W
0
1
REG4 Disable
REG4 Enable
READ ONLY
41h
[5]
R/W
REG4 Enable
41h
42h
[7:6]
[4:0]
R
REG5 Output Voltage
Selection
VSET5
ON5
R/W
See Table 10
0
1
REG5 Disable
REG5 Enable
READ ONLY
42h
[5]
R/W
REG5 Enable
42h
43h
43h
[7:6]
[0]
R
R
READ ONLY
[1]
W/E
WRITE-EXACT
Discharge Disable
Discharge Enable
Discharge Disable
Discharge Enable
0
1
0
1
43h
43h
DIS3
DIS4
[2]
[3]
R/W
R/W
REG3 Discharge Enable
REG4 Discharge Enable
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