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ZHCSRQ4 august 2023 TPSM8S6C24

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- MPQF759

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8.6.47 (58h) VIN_UV_WARN_LIMIT

CMD Address	58h
Write Transaction:	Write Word
Read Transaction:	Read Word
Format:	SLINEAR11 per CAPABILITY
Phased:	Yes
NVM Back-up:	EEPROM
Updates:	On-the-fly

The (58h) VIN_UV_WARN_LIMIT command sets the value of the PVIN pin voltage, in volts, that causes the input voltage detector to indicate an input undervoltage warning.

The (58h) VIN_UV_WARN_LIMIT is a phase command, each phase within a stack will independently detect and report input undervoltage warnings.

In response to an input undervoltage warning condition, the TPSM8S6C24 takes the following action:

Set the NONE OF THE ABOVE bit in the STATUS_BYTE.
Set the INPUT bit in the STATUS_WORD.
Set the VIN_UVW bit in the STATUS_INPUT register.
Notify the host per PMBus 1.3.1 Part II specification, section 10.2.

Figure 8-53 (58h) VIN_UV_WARN_LIMIT Register Map

15	14	13	12	11	10	9	8
RW	RW	RW	RW	RW	RW	RW	RW
VINUVW_EXP					VINUVW_MAN

7	6	5	4	3	2	1	0
RW	RW	RW	RW	RW	RW	RW	RW
VINUVW_MAN

LEGEND: R/W = Read/Write; R = Read only

Table 8-64 Register Field Descriptions

Bit	Field	Access	Reset	Description
15:11	VINUVW_ EXP	RW	11110b	Linear format two’s complement exponent
10:0	VINUVW_ MAN	RW	NVM	Linear format two’s complement mantissa Supported values 2.5 V to 15.5 V

Attempts to write (58h) VIN_UV_WARN_LIMIT to any value outside those specified as valid will be considered invalid/unsupported data and cause the TPSM8S6C24 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.