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4 POWeR SuPPlY
S1C17153 TeChniCal Manual
Seiko epson Corporation
4-5
(Rev. 1.0)
V
D1
Control Register (VD1_CTl)
Register name address
Bit
name
Function
Setting
init. R/W
Remarks
V
D1
Control
Register
(VD1_CTl)
0x5120
(8 bits)
D7–6
–
reserved
–
–
–
0 when being read.
D5
hVlD
V
D1
heavy load protection mode
1 On
0 Off
0
R/W
D4–0
–
reserved
–
–
–
0 when being read.
D[7:6]
Reserved
D5
hVlD: V
D1
heavy load Protection Mode Bit
Sets the V
D1
regulator into heavy load protection mode.
1 (R/W): Heavy load protection On
0 (R/W): Heavy load protection Off (default)
The V
D1
regulator enters heavy load protection mode by writing 1 to HVLD and it ensures stable out-
put. Use the heavy load protection function when a heavy load such as a lamp or buzzer is driven with
a port output. Current consumption increases in heavy load protection mode, therefore do not set if un-
necessary.
D[4:0]
Reserved