LM8322JGR8 NSC [National Semiconductor], LM8322JGR8 Datasheet - Page 32

• Manufacturer Part Number: LM8322JGR8
• Description: Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface
• Manufacturer: NSC [National Semiconductor]

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17.7 WRITE_PORT_STATE COMMAND
The WRITE_PORT_STATE command consists of a com-
mand byte (0x86) and two data bytes from the host. For
general-purpose I/O ports configured as inputs, the data
bytes select whether the inputs are high-impedance (0) or
17.8 READ_PORT_SEL COMMAND
The READ_PORT_SEL command consists of a command
byte (0x87) from the host and two data bytes from the
LM8322. The data bytes indicate the direction configured for
7
1
6
0
GPIO_xx
GPIO_xx
Bit
5
0
Bit
4
0
3
0
2
1
Value
1
1
0
1
Value
0
1
0
1
7
If the GPIO port pin is an input, pullup/pulldown device is disabled. If the GPIO port
pin is an output, it is driven low.
If the GPIO port pin is an input, pullup/pulldown device is enabled. If the GPIO port
pin is an output, it is driven high.
GPIO port pin is an input.
GPIO port pin is an output.
6
5
4
32
3
have a weak pullup (1). For ports configured as outputs, the
data bytes control the state driven on the output. The first data
byte controls ports GPIO_15 through GPIO_08, and the sec-
ond byte controls ports GPIO_07 through GPIO_00.
the corresponding ports, either input (0) or output (1). The first
data byte controls ports GPIO_15 through GPIO_08, and the
second byte controls ports GPIO_07 through GPIO_00.
2
1
Description
Description
0
7
6
5
4
3
2
1
0