Datasheet

EnablePolarity
8910 11 12131415 0123 4 567
POL
POL
0
1
Meaning
RailenableorGPOisactive-low.
RailenableorGPOisactive-high.
DEFAULT VALUESasspecifiedpreviously
ReferenceSelect
89101112131415 01234567
SELREF
000
001
Meaning
Externalreferenceselected(VCC)
Internalreferenceselected(2.5V)
SELREF
0x8F2
0
LastUnusedSeq
89101112131415 01234567
LUTIME
LUTIME =MaximumvalueUSTIME+255(inunitsofms)
UCD9080
SLVS692E – SEPTEMBER 2006 – REVISED MAY 2008 ................................................................................................................................................... www.ti.com
The EnablePolarity field in the configuration parameters specifies whether each power-supply enable or GPO is
to be configured active-high or active-low. The address map for these registers is as follows:
ADDRESS SIZE DEFAULT VALUE DESCRIPTION
0xE168 2 0x2004 Polarity for rail 1 enable
0xE16A 2 0x2008 Polarity for rail 2 enable
0xE16C 2 0x1804 Polarity for rail 3 enable
0xE16E 2 0x1802 Polarity for rail 4 enable
0xE170 2 0x1808 Polarity for rail 5 enable
0xE172 2 0x1810 Polarity for rail 6 enable
0xE174 2 0x1820 Polarity for rail 7 enable
0xE176 2 0x2010 Polarity for rail 8 enable
0xE178 2 0x2000 Polarity for GPO1
0xE17A 2 0x2020 Polarity for GPO2
0xE17C 2 0x2040 Polarity for GPO3
0xE17E 2 0x2080 Polarity for GPO4
The contents of this register are as follows:
The ReferenceSelect field in the configuration parameters specifies which voltage reference is used on the
UCD9080. The selected reference can be internal (2.5-V), or external via V
CC
(3.3 V). The register address is
0xE186 and contents are as follows:
The default value for this register is 0x08F2, which selects the external reference.
The LastUnusedSeq field in the configuration parameters specifies the amount of time for the last rail to be shut
down without creating an error. The register address is 0xE18E and contents are as follows:
The default value for this register is 0x08FF.
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