SLUSF28 November 2023 TPS546A24S
PRODUCTION DATA
CMD Address | ECh |
Write Transaction: | Write Word |
Read Transaction: | Read Word |
Format | Unsigned Word |
Phased: | No |
NVM Backup: | EEPROM or Pin Detect |
Updates: | Conversion Disable: see below. Conversion Enable: Read-Only |
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
R | R | R | R | R | R | R | R |
Reserved 0000h | |||||||
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
R | R | R | R | RW | RW | RW | RW |
BCX_START | BCX_STOP |
LEGEND: R/W = Read/Write; R = Read only |
Bit | Field | Access | Reset | Description |
---|---|---|---|---|
15:8 | Not supported | R | 0000h | Reserved. Equal 0000h. |
7:4 | BCX_START | R | 0000b | BCX_Address for Stack Loop Controller. Equal to 0000b. |
3:0 | BCX_STOP | RW | NVM | 0000b: Stand Alone, Single-phase 0001b: One Loop Follower, 2-phase 0010b: Two Loop Followers, 3-phase 0011b: Three Loop Followers, 4-phase Other: Not supported / Invalid |
Attempts to write (ECh) MFR_SPECIFIC_28 (STACK_CONFIG) to any value outside those specified as valid, will be considered invalid/unsupported data and cause TPS546A24S to respond by flagging the appropriate status bits and notifying the host according to the PMBus 1.3.1 Part II specification section 10.9.3.
(ECh) MFR_SPECIFIC_28 (STACK_CONFIG) controls the operation of the BCX_CLK and BCX_DAT pins. If the TPS546A24S powers up with (ECh) MFR_SPECIFIC_28 (STACK_CONFIG) equal to 0000h (Stand Alone) the BCX_CLK and BCX_DAT functionality is disabled. Changing (ECh) MFR_SPECIFIC_28 (STACK_CONFIG) to a Multi-phase configuration will not enable BCX communication until the next power-up. To program loop controller devices connected to a loop controller device that was powered up with (ECh) MFR_SPECIFIC_28 (STACK_CONFIG) = 0000h, program (EEh) MFR_SPECIFIC_30 (PIN_DETECT_OVERRIDE) to default (ECh) MFR_SPECIFIC_28 (STACK_CONFIG) to NVM by setting bit 12 = 0b, (15h) STORE_USER_ALL and cycle AVIN power below its UVLO prior to programing other commands to enable BCX communication and allow the loop controller device to relay commands to the loop follower devices.
(ECh) MFR_SPECIFIC_28 (STACK_CONFIG) can be changed from 0001h to 0003h to 0000h - 0003h live without requiring an AVIN power cycle since the BCX_CLK and BCX_DAT function is enabled at power up.