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| 型号： | EVAL-AD7879EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/41页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7879 |
| 标准包装： | 1 |
| 主要目的： | 接口，触摸屏控制器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD7879 |
| 主要属性： | 4 线电阻式触控屏控制器，I²C 和 SPI 接口 |
| 次要属性： | 图形用户界面，USB 接口 |
| 已供物品： | 板，线缆，CD，触控屏 |
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AD7879/AD7889
Rev. C | Page 22 of 40
DETAILED REGISTER DESCRIPTIONS
All addresses and default values are expressed in hexadecimal.
Table 12. Control Register 1
Address
Bit Name
Data Bit
Description
Default
Value
0x01
Disable PENIRQ
15
Pen interrupt enable.
0x0000
0 = PENIRQ is enabled.
1 = PENIRQ is disabled and INT is enabled.
CHNL ADD[2:0]
[14:12]
ADC channel address for manual conversion (ADC mode = 01).
111 = X+ input (Y position).
110 = Y+ input (X position).
101 = X+ (Z1) input for touch-pressure calculation.
100 = Y (Z2) input (used for touch-pressure measurement).
011 = AUX input.1
010 = VBAT input.1
001 = temperature measurement.
000 = not applicable.
ADC MODE[1:0]
[11:10]
ADC mode.
00 = no conversion.
01 = single conversion.2
10 = conversion sequence (slave mode).2
11 = conversion sequence (master mode).
ACQ[1:0]
[9:8]
ADC acquisition time.
00 = 4 clock periods (2 s).
01 = 8 clock periods (4 s).
10 = 16 clock periods (8 s).
11 = 32 clock periods (16 s).
Note that the acquisition time does not apply to the temperature sensor channels;
the temperature channel has a constant settling time of 16 μs.
TMR[7:0]
[7:0]
Conversion interval timer.
Starts at 550 s (00000001) and continues to 9.440 ms (11111111) in steps of 35 s
Note that, in slave mode, the conversion interval timer starts to count as soon as the
conversion sequence is finished; in master mode, it starts to count again only if the
screen remains touched. If the screen is released, the timer stops counting and, on
the next screen touch, a conversion starts immediately.
1
If GPIO is enabled in Control Register 2 (Bit 13), AUX and VBAT are both ignored. If AUX and VBAT are both selected in Control Register 3 and GPIO is disabled, AUX is
ignored and VBAT is measured.
2
Note that these bits are cleared to 00 at the end of the conversion sequence if the conversion interval timer bits in Control Register 1 (Address 0x01) Bits[7:0] = 0x00 at
the end of the conversion sequence.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7887CB | 制造商:Analog Devices 功能描述:EVAL BD FOR 2.7 V TO 5.25 V, MICROPWR, 2CH, 125 KSPS, 12-BIT - Bulk |
| EVAL-AD7887CB4 | 制造商:AD 制造商全称:Analog Devices 功能描述:2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP |
| EVAL-AD7887CBZ | 功能描述:BOARD EVAL FOR AD7887 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7888CB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 2.7 V TO 5.25 V, MICROPWR, 8CH, 125 KSPS, 12-BI - Bulk |
| EVAL-AD7890-2 | 制造商:Analog Devices 功能描述:AD7890 EVAL BOARD |
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