ISL8270M Datasheet, PDF (42/51 Pages) Intersil Corporation – Digital DC/DC PMBus 25A Module

ISL8270M
POWER_GOOD_DELAY (D4h)
Definition: Sets the delay applied between the output exceeding the PG threshold (POWER_GOOD_ON) and asserting the PG pin. The
delay time can range from 0ms up to 500s, in steps of 125ns. A 1ms minimum configured value is recommended to apply proper
de-bounce to this signal.
Data Length in Bytes: 2
Data Format: L11
Type: R/W
Default Value:1ms
Units: ms
Range: 0 to 5s
ASCR_CONFIG (DFh)
Definition: Allows user configuration of ASCR settings.
Data Length in Bytes: 4
Data Format: CUS
Type: R/W
Default Value: 015A0100h
BIT
PURPOSE
DATA FORMAT
31:25
Unused
24
ASCCR Enable
BIT
23:16
15:0
ASCR Residual Setting
ASCR Gain Setting
Integer
Integer
VALUE
0000000h
1
0
DESCRIPTION
Unused
Enable
Disable
SEQUENCE (E0h)
Definition: Identifies the Rail DDC ID of the prequel and sequel rails when performing multi-rail sequencing. The device will enable its
output when its EN or OPERATION enable states, as defined by ON_OFF_CONFIG, is set and the prequel device has issued a Power-Good
event on the DDC bus. The device will disable its output (using the programmed delay values) when the sequel device has issued a
Power-Down event on the DDC bus.
The data field is a two-byte value. The most-significant byte contains the 5-bit Rail DDC ID of the prequel device. The least-significant
byte contains the 5-bit Rail DDC ID of the sequel device. The most significant bit of each byte contains the enable of the prequel or
sequel mode. This command overrides the corresponding sequence configuration set by the CONFIG pin settings.
Data Length in Bytes: 2
Data Format: BIT
Type: R/W
Default Value: 00h (Prequel and Sequel disabled)
BIT
FIELD NAME
Prequel Enable
15
14:13
12:8
7
Reserved
Prequel Rail DDC ID
Sequel Enable
6:5
Reserved
4:0
Sequel Rail DDC ID
VALUE
0
1
0
0-31
0
1
0
0-31
SETTING
Disable
Enable
Reserved
DDC ID
Disable
Enable
Reserved
DDC ID
DESCRIPTION
Disable, no prequel preceding this rail.
Enable, prequel to this rail is defined by bits 12:8.
Reserved.
Set to the DDC ID of the prequel rail.
Disable, no sequel following this rail.
Enable, sequel to this rail is defined by bits 4:0.
Reserved.
Set to the DDC ID of the sequel rail.
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FN8635.1
July 2, 2015