Datasheet

LTC2977
58
2977fa
For more information www.linear.com/LTC2977
PMBus COMMAND DESCRIPTION
MFR_PADS
The MFR_PADS command provides read only access to slow frequency digital pads (pins). The input values presented
in bits[9:0] are before any deglitching logic.
MFR_PADS Data Contents
BIT(S) SYMBOL OPERATION
b[15] Mfr_pads_pwrgd_drive 0 = PWRGD pad is being driven low by this chip
1 = PWRGD pad is not being driven low by this chip
b[14] Mfr_pads_alertb_drive 0 = ALERTB pad is being driven low by this chip
1 = ALERTB pad is not being driven low by this chip
b[13:10] Mfr_pads_faultb_drive[3:0] Bit[3] used for FAULTB00 pad, bit[2] used for FAULTB01 pad, bit[1] used for FAULTB10 pad, bit[0] used for
FAULTB11 pad as follows:
0 = FAULTBzn pad is being driven low by this chip
1 = FAULTBzn pad is not being driven low by this chip
b[9:8] Mfr_pads_asel1[1:0] 11: Logic high detected on ASEL1 input pad
10: ASEL1 input pad is floating
01: Reserved
00: Logic low detected on ASEL1 input pad
b[7:6] Mfr_pads_asel0[1:0] 11: Logic high detected on ASEL0 input pad
10: ASEL0 input pad is floating
01: Reserved
00: Logic low detected on ASEL0 input pad
b[5] Mfr_pads_control1 1: Logic high detected on CONTROL1 pad
0: Logic low detected on CONTROL1 pad
b[4] Mfr_pads_control0 1: Logic high detected on CONTROL0 pad
0: Logic low detected on CONTROL0 pad
b[3:0] Mfr_pads_faultb[3:0] Bit[3] used for FAULTB00 pad, bit[2] used for FAULTB01 pad, bit[1] used for FAULTB10 pad, bit[0] used
for
FAUL
TB11 pad as follows:
1: Logic high detected on FAULTBzn pad
0: Logic low detected on FAULTBzn pad