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ISL8270MEVAL1Z Datasheet(PDF) 45 Page - Renesas Technology Corp |
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ISL8270MEVAL1Z Datasheet(HTML) 45 Page - Renesas Technology Corp |
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45 / 56 page  ISL8270M FN8635 Rev.4.00 Page 45 of 56 Aug 17, 2017 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: 0000h (Prequel and Sequel disabled) DDC_GROUP (E2h) Definition: Configures fault spreading group ID and enable, broadcast OPERATION group ID and enable, and broadcast VOUT_COMMAND group ID and enable. Data Length in Bytes: 3 Data Format: BIT Type: R/W Default Value: 000000h (Ignore BROADCAST VOUT_COMMAND and OPERATION, Sequence shutdown on POWER_FAIL event) BIT FIELD NAME VALUE SETTING DESCRIPTION 15 Prequel Enable 0 Disable Disable, no prequel preceding this rail. 1 Enable Enable, prequel to this rail is defined by bits 12:8. 14:13 Reserved 0 Reserved Reserved. 12:8 Prequel Rail DDC ID 0-31 DDC ID Set to the DDC ID of the prequel rail. 7 Sequel Enable 0 Disable Disable, no sequel following this rail. 1 Enable Enable, sequel to this rail is defined by bits 4:0. 6:5 Reserved 0 Reserved Reserved. 4:0 Sequel Rail DDC ID 0-31 DDC ID Set to the DDC ID of the sequel rail. BITS PURPOSE VALUE DESCRIPTION 23:22 Reserved 0 Reserved 21 BROADCAST_VOUT_COMMAND Response 1 Responds to BROADCAST_VOUT_COMMAND with same Group ID. 0Ignores BROADCAST_VOUT_COMMAND. 20:16 BROADCAST_VOUT_COMMAND Group ID 0-31d Group ID sent as data for broadcast BROADCAST_VOUT_COMMAND events. 15:14 Reserved 0 Reserved. 13 BROADCAST_OPERATION Response 1 Responds to BROADCAST_OPERATION with same Group ID. 0Ignores BROADCAST_OPERATION. 12:8 BROADCAST_OPERATION Group ID 0-31d Group ID sent as data for broadcast BROADCAST_OPERATION events. 7:6 Reserved 0 Reserved. 5 POWER_FAIL Response 1 Responds to POWER_FAIL events with same Group ID by shutting down immediately. 0 Responds to POWER_FAIL events with same Group ID with sequenced shutdown. 4:0 POWER_FAIL group ID 0-31d Group ID sent as data for broadcast POWER_FAIL events. |
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