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參數(shù)資料
| 型號： | LM8500HLQ9/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, QCC44 |
| 封裝： | LLP-44 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大小： | 327K |
| 代理商： | LM8500HLQ9/NOPB |
9.0 Functional Description (Continued)
PC
Command
PC
Byte
1
PC
Byte 2
TSC
Byte 1
TSC
Byte 2
Read stored
calibration
points
$B4
$CA
Set focus
value (# of
pixels on
touch panel)
$B8
$0-$3F
$CA
$00-$3F
Set#of
samples per
coordinate (1,
2, 4, 8, 16,
32)
$BA
$01, $02,
$04, $08,
$10, $20
$CA
$01, $02,
$04, $08,
$10, $20
Set
communication
mode
(stream,
touchdown,
liftoff)
$BB
$01, $02,
$04
$CA
$01, $02,
$04
Set max delta
(# of pixels
from
predicted
coordinate)
$BC
$00-$3F
$CA
$00-$3F
Set calibration
points
$BD
$CA
Set minimum
pressure
$BE
$00-$7F
$CA
$00-$7F
Toggle
disable/enable
external filter
path
$A0
$CA
$00, $01
Toggle
disable/enable
self
power-down
$A2
$CA
$00, $01
Toggle
disable/enable
echo mode
$A3
$CA
$00, $01
Toggle
disable/enable
pressure
measurements
$A4
$CA
$00, $01
PC
Command
PC
Byte
1
PC
Byte 2
TSC
Byte 1
TSC
Byte 2
Toggle
disable/enable
calibration
coordinate
check
$A5
$CA
$00, $01
Wakeup
$A7
Shutdown
$A8
$CA
Soft reset
$AF
$CA
$CB, $CC
TSC Replies
Timeout
$CF
Re-send
$CE
Self test failed
$CC
Self test ok
$CB
Acknowledge
$CA
Calibration
coordinates
ok
$C4
Error / buffer
overrun
$C8
Software
version
$C7
$0-$7F
Data transmit
$80/$90 Payload (3/4
bytes)
9.3.3 Advanced Command Bytes Descriptions
Unless otherwise mentioned, all values are in hex.
$B0: Read clock-speed
Reply Byte #1: $CA (Acknowledge)
Byte #2: Clock readout (0 = 3.3MHz, 1 = 10MHz)
CLK_SEL pin tells the firmware which oscillator speed is
used. If the CLK_SEL input pin is floating or pulled high a
10.0MHz oscillator must be connected. If the pin is pulled
low a 3.3MHz oscillator must be connected. This command
enables the driver software to determine which oscillator
speed is used with the touch screen controller, as this deter-
mines the maximum coordinate pair per second data rates.
Note: This is available in the LM8500 only.
$B1: Read parameters
Reply Byte #1: $CA (Acknowledge)
Reply Byte #2: First byte in software version number,
year 20 (00-99)
Reply Byte #3: Communication mode (1 = stream, 2 =
touchdown, 4 = liftoff)
Byte #4: Wakeup on touch (0 = disabled, 1 = enabled)
Reply Byte #5: Number of samples (1,2, 4, 8, 16 or
32)
Byte #6: Clock readout (0 = 3.3MHz, 1 = 10MHz)
Byte #7: Second byte in software version number,
month (1-12)
Byte #8: Third byte in software version number, day
(1-31)
Byte #9: Focus value (0-63)
Byte #10: Max delta (0-63)
LM8300/LM8500
www.national.com
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