MAX16068 Datasheet, PDF (13/40 Pages) Maxim Integrated Products – 6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers

6-Channel, Flash-Configurable System Manager
with Nonvolatile Fault Registers
General-Purpose Inputs/Outputs
GPIO1–GPIO6 are programmable general-purpose
inputs/outputs. GPIO1–GPIO6 are configurable as a
manual reset input, a watchdog timer input and output,
logic inputs/outputs, and fault-dependent outputs. When
programmed as outputs, GPIO_s are open-drain or
push-pull. See Tables 5 and 6 for more detailed informa-
tion on configuring GPIO1–GPIO6.
When GPIO1–GPIO6 are configured as general-pur-
pose inputs/outputs, read values from the GPIO_ ports
through r1Eh and write values to GPIO_s through r3Eh.
Note that r3Eh has a corresponding flash register, which
programs the default state of a general-purpose output.
See Table 7 for more information on reading and writing
to the GPIO_.
Table 5. GPIO_ Configuration Registers
REGISTER ADDRESS FLASH ADDRESS
3Fh
23Fh
40h
240h
BIT RANGE
[1:0]
[3:2]
[5:4]
[7:6]
[1:0]
[3:2]
[4]
[7:5]
DESCRIPTION
GPIO1 configuration
GPIO2 configuration
GPIO3 configuration
GPIO4 configuration
GPIO5 configuration
GPIO6 configuration
ARAEN bit
Not used
Table 6. GPIO_ Function Configuration Bits
GPIO1
00
Logic input
01
Logic output
(push-pull)
10
Logic output
(open drain)
GPIO2
Logic input
Logic output
(push-pull)
Logic output
(open drain)
GPIO3
Logic input
Logic output
(push-pull)
Logic output
(open drain)
11
ALERT (open drain) FAULT (open drain) MR input
Table 7. GPIO_ State Registers
REGISTER
ADDRESS
1Eh
3Eh
FLASH
ADDRESS
—
23Eh
BIT RANGE
[0]
[1]
[2]
[3]
[4]
[5]
[7:6]
[0]
[1]
[2]
[3]
[4]
[5]
[7:6]
GPIO1 input state
GPIO2 input state
GPIO3 input state
GPIO4 input state
GPIO5 input state
GPIO6 input state
Not used
GPIO1 output state
GPIO2 output state
GPIO3 output state
GPIO4 output state
GPIO5 output state
GPIO6 output state
Not used
GPIO4
Logic input
Logic output
(push-pull)
Logic output
(open drain)
WDI
GPIO5
Logic input
Logic output
(push-pull)
Logic output
(open drain)
WDO
(open drain)
DESCRIPTION
GPIO6
Logic input
Logic output
(push-pull)
Logic output
(open drain)
EXTFAULT
(open drain)
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