參數(shù)資料
型號(hào)： LM8500HVA9/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQCC44
封裝： PLASTIC, LCC-44
文件頁(yè)數(shù)： 10/20頁(yè)
文件大小： 327K
代理商： LM8500HVA9/NOPB
14.0 Calibration (Continued)
send a reply byte of $CC to the TS driver. At this point, the
TS driver should either notify the user to redo the calibration
point or automatically redo the calibration again. If the self-
test was successful, the device will send a reply byte of $CB
to the TS driver.
14.3 CALIBRATION PROCEDURES WITH
COORDINATES CHECKING DISABLED
To do TS calibration with coordinates checking disabled, first
ensure the Calibration Coordinates Checking is disabled on
the device. This can be accomplished by sending a com-
mand byte of $B1 (Read Parameters command) and check-
ing the 5th bit of the 12th reply byte is not set. Alternatively,
if the device is set to Calibration Coordinates Checking
disabled as default, this step can be skipped.
The TS driver sends the command byte to do calibration
($BD). The TS driver should wait for the reply bytes and
ensure it is the same command bytes it sent. The device
waits for a touch to be detected on the panel. Once a touch
is detected, the device save the values into the internal flash
and send a reply byte of $C4 to the TS driver. The TS driver
can now send a command byte to do the next calibration
point. Since the Calibration Checking is disabled, the TS
driver should ensure the calibration point is within the range
of the calibration cross.
Once all the calibration points are done, the device does a
self-test. If the self-test was not successful, the device will
send a reply byte of $CC to the TS driver. At this point, the
TS driver should either notify the user to redo the calibration
point or automatically redo the calibration again. If the self-
test was successful, the device will send a reply byte of $CB
to the TS driver.
15.0 Revision History
Date
Section
Summary of Changes
October 2002
Initial release.
May 2003
All sections
Removed LM8400 part.
Brownout Reset
Updated section to reflect the change and made external reset circuitry
optional.
July 2003
Advanced Command Bytes
Descriptions
Added command byte $A5
Updated controller reply bytes
December
2003
Advanced Command Bytes
Descriptions
Added description for command byte $A5
LM8300/LM8500
www.national.com
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相關(guān)PDF資料
PDF描述
LM8500IMT9/NOPB SPECIALTY CONSUMER CIRCUIT, PDSO48
LM8500HLQ9/NOPB SPECIALTY CONSUMER CIRCUIT, QCC44
LM8300HVA9/NOPB SPECIALTY CONSUMER CIRCUIT, PQCC44
LM8300IMT9/NOPB SPECIALTY CONSUMER CIRCUIT, PDSO48
LM8300HLQ9/NOPB SPECIALTY CONSUMER CIRCUIT, QCC44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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LM8500IMT9B/NOPB 功能描述:觸摸屏轉(zhuǎn)換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20
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