Manual

MAX5961
0 to 16V, Quad, Hot-Swap Controller
with 10-Bit Current and Voltage Monitor
16 ______________________________________________________________________________________
Table 1b. Register Address Map (General)
REGISTER DESCRIPTION
ADDRESS
(HEX CODE)
RESET
VALUE
TABLE
mon_range MON_ input range selection 0x30 0x00 17, 18
cbuf_chx_store Selective enabling of individual blocks in the circular buffer 0x31 0xFF 42
ifast2slow
Current threshold ratio setting for the fast comparator vs. slow
comparator
0x5E 0xFF 5a, 5b
status0 Slow-trip and fast-trip comparators status register 0x5F Cx00 50
status1 PROT, MODE, and ON_ inputs status register 0x60 — 2, 4a, 4b, 29
sense_range ILIM_ inputs status register 0x61 — 6, 7a, 7b
status3 RETRY, POL, ALERT, and PG_ status register 0x62 — 30
fault0 Status register for undervoltage detection (warning or critical) 0x63 0x00 47
fault1 Status register for overvoltage detection (warning or critical) 0x64 0x00 48
fault2 Status register for overcurrent detection (warning) 0x65 0x00 49
pgdly Delay setting between MON_ measurement and PG_ assertion 0x66 0x00 31a, 31b
fokey Load register with 0xA5 to enable force-on function 0x67 0x00 46
foset Register that enables force-on function for a channel 0x68 0x00 45
chxen Channel enable bits 0x69 — 3
dgl_i OC deglitch enable bits 0x6A 0x00 38
dgl_uv UV deglitch enable bits 0x6B 0x00 39
dgl_ov OV deglitch enable bits 0x6C 0x00 40
cbufrd_hibyonly Circular buffers readout mode: 8 bit or 10 bit 0x6D 0x00 43
cbuf_dly_stop
Circular buffer stop-delay. Number of samples recorded to the
circular buffer after channel shutdown.
0x72 0x19 44
peak_log_rst Reset control bits for peak-detection registers 0x73 0x00 36
peak_log_hold Hold control bits for peak-detection registers 0x74 0x00 37
Table 2. Grouping Hot-Swap Channels
MODE INPUT
STATUS
MODE [1] MODE [0] FUNCTION DESCRIPTION
Low 1 0 Independent
Each channel operates as an independent hot-swap controller. A fault
shutdown in one channel does not affect operation of other channels.
High 0 1 Paired
Channels 1 and 3 operate together as one pair while channels 2 and 4
operate as another pair. A fault shutdown in one channel of a pair shuts
down both channels in the pair.
Unconnected 0 0 Grouped
All channels operate as a group. A fault shutdown in one channel shuts
down all four channels.
Grouping Hot-Swap Channels
Depending on the state of the MODE input, the four-
channel MAX5961 can operate as four independent
hot-swap controllers, two pairs of controllers, or with all
four controllers grouped together (see Tables 2 and 4a).