SMBus/I 2 C Interfaced 4-Port, Level-Translating
GPIOs and LED Drivers
Table 1. Register Address Map
REGISTER
Port P1 or INT Output
Port P2 or OSCIN Input
Port P3 or OSCOUT Output
Port P4
Configuration 26
Configuration 27
FACTORY RESERVED (Do not write to these registers)
FACTORY RESERVED (Do not write to these registers)
ADDRESS
0x01
0x02
0x03
0x04
0x26
0x27
0x3C–0x3F
0x00
AUTOINCREMENT ADDRESS
0x02
0x03
0x04
0x05*
0x27
0x28*
0x3F–0x40
0x01
POR STATE
0x80
0x80
0x80
0x80
0xEC
0x8F
0x00
0x80
* No registers are present.
Table 2. Power-Up Register Status
REGISTER
POWER-UP CONDITION
ADDRESS
CODE (hex)
REGISTER DATA
D7 D6 D5 D4 D3 D2 D1 D0
Ports P1–P4
Configuration 26
Configuration 27
Ports P_ are V LA referred input ports with interrupt
and debounce disabled
RST does not reset registers or counters; blink period
is 1Hz; transition flag clear; interrupt status flag clear
Ports P1–P4 are GPIO ports; bus timeout is
disabled
0x01–0x04
0x26
0x27
1
1
1
0
1
0
0
1
0
0
0
0
0
1
1
0
1
1
0
0
1
0
0
1
8
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