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参数资料
| 型号： | LM8500HVA9/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 9/20页 |
| 文件大小： | 327K |
| 代理商： | LM8500HVA9/NOPB |
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-
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
LM8300/LM8500
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM8500ILQ9 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Four Wire Resistive Touchscreen Controller with Brownout |
| LM8500IMT9 | 功能描述:IC TOUCHSCREEN CONTROLLR 48TSSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:- 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LM8500IMT9B | 功能描述:触摸屏转换器和控制器 RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| LM8500IMT9B/NOPB | 功能描述:触摸屏转换器和控制器 RoHS:否 制造商:Microchip Technology 类型:Resistive Touch Controllers 输入类型:3 Key 数据速率:140 SPS 分辨率:10 bit 接口类型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 电源电压:2.5 V to 5.25 V 电源电流:17 mA 工作温度:- 40 C to + 85 C 封装 / 箱体:SSOP-20 |
| LM8500IVA9 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Four Wire Resistive Touchscreen Controller with Brownout |
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