Datasheet

LTC2977
52
2977fa
For more information www.linear.com/LTC2977
MFR_FAULTB00_RESPONSE, MFR_FAULTB01_RESPONSE, MFR_FAULTB10_RESPONSE and MFR_
FAULTB11_RESPONSE
These manufacturer specific commands share the same format and specify the response to assertions of the FAULTB
pins. For fault zone 0, MFR_FAULTB00_RESPONSE determines whether channels 0 to 3 shut off when the FAULTB00
pin is asserted, and MFR_FAULTB01_RESPONSE determines whether channels 0 to 3 shut off when the FAULTB01
pin is asserted. For fault zone 1, MFR_FAULTB10_RESPONSE determines whether channels 4 to 7 shut off when the
FAULTB10 pin is asserted, and MFR_FAULTB11_RESPONSE determines whether channels 4 to 7 shut off when the
FAULTB11 pin is asserted. When a channel shuts off in response to a FAULTB pin, the ALERTB pin is asserted low and
the appropriate bit is set in the STATUS_MFR_SPECIFIC register. For a graphical explanation, see the switches on the
left hand side of Figure 20, Channel Fault Management Block Diagram.
Data Contents—Fault Zone 0 Response Commands
BIT(S) SYMBOL OPERATION
b[7:4] Reserved Read only, always returns 0s.
b[3] Mfr_faultb00_response_chan3,
Mfr_faultb01_response_chan3
Channel 3 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[2] Mfr_faultb00_response_chan2,
Mfr_faultb01_response_chan2
Channel 2 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[1] Mfr_faultb00_response_chan1,
Mfr_faultb01_response_chan1
Channel 1 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[0] Mfr_faultb00_response_chan0,
Mfr_faultb01_response_chan0
Channel 0 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
Data Contents—Fault Zone 1 Response Commands
BIT(S) SYMBOL OPERATION
b[7:4] Reserved Read only, always returns 0s.
b[3] Mfr_faultb10_response_chan7,
Mfr_faultb11_response_chan7
Channel 7 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[2] Mfr_faultb10_response_chan6,
Mfr_faultb11_response_chan6
Channel 6 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[1] Mfr_faultb10_response_chan5,
Mfr_faultb11_response_chan5
Channel 5 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
b[0] Mfr_faultb10_response_chan4,
Mfr_faultb11_response_chan4
Channel 4 response.
0: The channel continues operation without interruption.
1: The channel shuts down if the corresponding FAULTBzn pin is still asserted after 10µs. When the FAULTBzn
pin subsequently deasserts, the channel turns back on, honoring TON_DELAY and TON_RISE settings.
PMBus COMMAND DESCRIPTION