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參數資料
| 型號： | LM8300ILQ9 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Four Wire Resistive Touchscreen Controller with Brownout |
| 中文描述： | 四線電阻式觸摸屏控制器掉電 |
| 文件頁數： | 17/20頁 |
| 文件大小： | 327K |
| 代理商： | LM8300ILQ9 |
14.0 Calibration
(Continued)
14.2 CALIBRATION PROCEDURES WITH
COORDINATES CHECKING ENABLED
To do TS calibration with coordinates checking enabled, first
ensure the Calibration Coordinates Checking is enabled on
the device. This can be accomplished by sending a com-
mand byte of $B1 (Read Parameters command) and check-
ing the 5th bit of the 12th reply byte is set. Alternatively, if the
device is set to Calibration Coordinates Checking enabled
as default, this step can be skipped.
The TS driver sends the command byte to do calibration
($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 checks it against the predetermined
calibration values as noted on
Table 3. Two Points Calibra-
tion
,
Table 4. Five Points Calibration
, and
Table 5. Thirteen
Points Calibration
. If the detected touch is within the pre-
defined value (
±
127 of the raw A/D value), the device will
send a command of $C4 to the TS driver and store the
calibration point in the internal flash. The TS driver can now
send a command byte to do the next calibration point. If the
detected touch is not within the predefined value, the device
will send a reply byte of $C8 to the TS driver. Upon receiving
this reply byte, the TS driver can resend the calibration
command for the same calibration point, go the next calibra-
tion point, or abort the calibration process.
Once all the calibration points are done, the device does a
self-test. If the self-test was not successful, the device will
20037210
FIGURE 8. Calibration Procedures with Coordinates Checking Enabled
L
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM8300IMT9 | 功能描述:IC TOUCHSCREEN CONTROLLR 48TSSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數/鍵:- 分辨率（位）:- 評估套件:* 數據接口:- 數據速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| LM8300IMT9/NOPB | 制造商:Texas Instruments 功能描述:Four Wire Resistive Touchscreen Controller With Brownout 48-Pin TSSOP |
| LM8300IMT9B | 功能描述:觸摸屏轉換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數據速率: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 |
| LM8300IMT9B/63 | 功能描述:觸摸屏轉換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數據速率: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 |
| LM8300IMT9B/63SN | 功能描述:觸摸屏轉換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數據速率: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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