MAX16048 Maxim Integrated Products, MAX16048 Datasheet - Page 21

• Manufacturer Part Number: MAX16048
• Description: (MAX16046 / MAX16048) 12-Channel/8-Channel EEPROM-Programmable System Managers
• Manufacturer: Maxim Integrated Products

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GPIO1–GPIO4 are configurable as feedback sense
return inputs (INS_) for closed-loop tracking. Connect the
gate of an external n-channel MOSFET to each EN_OUT_
configured for closed-loop tracking. Connect INS_ inputs
to the source of the MOSFETs for tracking feedback.
Internal comparators monitor INS_ with respect to a
control tracking ramp voltage for power-up/power-down
and control each EN_OUT_ voltage. Under normal con-
ditions each INS_ voltage tracks the ramp voltage until
the power-good voltage threshold has been reached.
The slew rate for the ramp voltage and the INS_ to
MON_ power-good threshold are programmable. See
the Closed-Loop Tracking section.
Table 6. GPIO Data-In/Data-Out Data
System Managers with Nonvolatile Fault Registers
EXTENDED PAGE
ADDRESS
1Ah
1Bh
12-Channel/8-Channel EEPROM-Programmable
Voltage Tracking Sense (INS_) Inputs
______________________________________________________________________________________
BIT RANGE
[7:6]
[7:6]
[0]
[1]
[2]
[3]
[4]
[5]
[0]
[1]
[2]
[3]
[4]
[5]
GPIO Logic Output Data
0 = GPIO1 is a logic-low output
1 = GPIO1 is a logic-high output
0 = GPIO2 is a logic-low output
1 = GPIO2 is a logic-high output
0 = GPIO3 is a logic-low output
1 = GPIO3 is a logic-high output
0 = GPIO4 is a logic-low output
1 = GPIO4 is a logic-high output
0 = GPIO5 is a logic-low output
1 = GPIO5 is a logic-high output
0 = GPIO6 is a logic-low output
1 = GPIO6 is a logic-high output
Not used
GPIO Logic Input Data
GPIO1 logic-input state
GPIO2 logic-input state
GPIO3 logic-input state
GPIO4 logic-input state
GPIO5 logic-input state
GPIO6 logic-input state
Not used
INS_ connections can also act as 100Ω pulldowns for
closed-loop tracking channels or for other power sup-
plies, if INS_ are connected to the outputs of the sup-
plies. Set the appropriate bits in r4Eh[7:4] to enable
pulldown functionality. See Table 13.
Configure GPIO1–GPIO6 be used as general-purpose
inputs/outputs. Write values to GPIOs through r1Ah
when operating as outputs, and read values from r1Bh
when operating as inputs. Register r1Bh is read-only.
See Table 6 for more information on reading and writing
to the GPIOs as logic inputs/outputs. Both registers
r1Ah and r1Bh are located in the extended page and
are therefore not loaded from EEPROM on boot-up.
DESCRIPTION
General-Purpose Logic Inputs/Outputs
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