LTM4686BEVPBF datasheet(106/130 Pages) AD

106 / 130 page

LTM4686B

106

Rev. 0

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APPENDIX C: PMBUS COMMAND DETAILS

MFR_GPIO_PROPAGATE

The MFR_GPIO_PROPAGATE command enables the faults that can cause the GPIOn pin to assert low. The command is

formatted as shown in Table 29. Faults can only be propagated to the GPIOn if they are programmed to respond to faults.

This command has two data bytes.

Table 29. GPIOn Propagate Fault Configuration. The GPIO0 and GPIO1 pins are designed to provide electrical notification of selected events to

the user. Some of these events are common to both output channels. Others are specific to an output channel. They can also be used to share faults

between channels.

BIT(S)

SYMBOL

OPERATION

B[15]

VOUT disabled while not decayed.

This is used in a PolyPhase configuration when bit 0 of the MFR_CHAN_CONFIG is a zero. If the

channel is turned off, by toggling the RUN pin or commanding the part OFF, and then the RUN is

reasserted or the part is commanded back on before the output has decayed, VOUT will not restart

until the 12.5% decay is honored. The GPIOn pin is asserted during this condition if bit 15 is

asserted.

B[14]

Mfr_gpio_propagate_short_CMD_cycle 0: No action

1: Asserts low if commanded off then on before the output has sequenced off. Re-asserts high

120ms after sequence off.

b[13]

Mfr_gpio_propagate_ton_max_fault

0: No action if a TON_MAX_FAULT fault is asserted

1: Associated output will be asserted low if a TON_MAX_FAULT fault is asserted

GPIO0 is associated with page 0 TON_MAX_FAULT faults

GPIO1 is associated with page 1 TON_MAX_FAULT faults

b[12]

Mfr_gpio0_propagate_vout_uvuf,

Mfr_gpio1_propagate_vout_uvuf

Unfiltered VOUT_UV_FAULT_LIMIT comparator output

GPIO0 is associated with channel 0

GPIO1 is associated with channel 1

b[11]

Mfr_gpio0_propagate_int_ot,

Mfr_gpio1_propagate_int_ot

0: No action if the MFR_OT_FAULT_LIMIT fault is asserted

1: Associated output will be asserted low if the MFR_OT_FAULT_LIMIT fault is asserted

b[10]

Mfr_pwrgd1_en*

0: No action if channel 1 POWER_GOOD is not true

1: Associated output will be asserted low if channel 1 POWER_GOOD is not true

If this bit is asserted, the GPIO_FAULT_RESPONSE must be ignore. If the GPIO_FAULT_

RESPONSE is not set to ignore, the part will latch off and never be able to start.

b[9]

Mfr_pwrgd0_en*

0: No action if channel 0 POWER_GOOD is not true

1: Associated output will be asserted low if channel 0 POWER_GOOD is not true

If this bit is asserted, the GPIO_FAULT_RESPONSE must be ignore. If the GPIO_FAULT_

RESPONSE is not set to ignore, the part will latch off and never be able to start.

b[8]

Mfr_gpio0_propagate_ut,

Mfr_gpio1_propagate_ut

0: No action if the UT_FAULT_LIMIT fault is asserted

1: Associated output will be asserted low if the UT_FAULT_LIMIT fault is asserted

GPIO0 is associated with page 0 UT faults

GPIO1 is associated with page 1 UT faults

b[7]

Mfr_gpio0_propagate_ot,

Mfr_gpio1_propagate_ot

0: No action if the OT_FAULT_LIMIT fault is asserted

1: Associated output will be asserted low if the OT_FAULT_LIMIT fault is asserted

GPIO0 is associated with page 0 OT faults

GPIO1 is associated with page 1 OT faults

b[6]

Reserved

b[5]

Reserved

b[4]

Mfr_gpio0_propagate_input_ov,

Mfr_gpio1_propagate_input_ov

0: No action if the VIN_OV_FAULT_LIMIT fault is asserted

1: Associated output will be asserted low if the VIN_OV_FAULT_LIMIT fault is asserted

LTM4686BEVPBF 数据表(PDF) 106 Page - Analog Devices

LTM4686BEVPBF 数据表(HTML) 106 Page - Analog Devices

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