LM8322JGR8 NSC [National Semiconductor], LM8322JGR8 Datasheet - Page 34

• 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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17.12 SET_ACTIVE COMMAND
The SET_ACTIVE command consists of a command byte
(0x8B) and a data byte from the host. This command sets the
time that the LM8322 stays active without detecting a key-
17.13 READ_ERROR COMMAND
The READ_ERROR command consists of a command byte
(0x8C) from the host and a data byte from the LM8322. After
7
1
7
1
ACTIVETIME
6
0
FIFOOVR
CMDUNK
KEYOVR
BADPAR
6
0
Field
Bit
5
0
5
0
4
0
4
0
3
1
3
1
2
0
Value
1–255
Value
2
1
0
0
1
0
1
0
1
0
1
1
1
1
0
0
1
Halt mode is disabled.
Active time = n × 4 milliseconds.
0
0
No FIFO overrun occurred.
Event occurred while the FIFO was full.
No keypad overrun occurred.
More than two keys were pressed simultaneously.
No invalid command was encountered.
Not a valid command.
No bad parameter was encountered.
Bad command parameter.
7
7
0
FIFOOVR
6
6
34
press or key-release event before entering Halt mode. The
default active time is 500 milliseconds. The host can program
ACTIVETIME from 4–1020 milliseconds with a granularity of
4 milliseconds.
reading an interrupt code that indicates an error condition, this
command is used to read an error code that indicates the
cause of the error condition.
5
5
0
4
0
4
Description
ACTIVETIME
Description
3
0
3
KEYOVR
2
2
CMDUNK
1
1
BADPAR
0
0