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LM8322 数据表(PDF) 34 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM8322
功能描述  Mobile I/O Companion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface
PDF  42 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM8322 数据表(HTML) 34 Page - National Semiconductor (TI)

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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-
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.
7
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2
1
0
7
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0
1
0
0
0
1
0
1
1
ACTIVETIME
Field
Value
Description
ACTIVETIME
0
Halt mode is disabled.
1–255
Active time = n × 4 milliseconds.
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
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.
7
6
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1
0
7
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1
0
1
0
0
0
1
1
0
0
0
FIFOOVR
0
0
0
KEYOVR
CMDUNK
BADPAR
Bit
Value
Description
FIFOOVR
0
No FIFO overrun occurred.
1
Event occurred while the FIFO was full.
KEYOVR
0
No keypad overrun occurred.
1
More than two keys were pressed simultaneously.
CMDUNK
0
No invalid command was encountered.
1
Not a valid command.
BADPAR
0
No bad parameter was encountered.
1
Bad command parameter.
www.national.com
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