参数资料
型号: AD7889ACBZ-RL
厂商: Analog Devices Inc
文件页数: 26/41页
文件大小: 0K
描述: IC ADC 12BIT CTRLR TOUCH 12WLCSP
产品变化通告: 8mm Carrier Tape Changes 28/Feb/2012
标准包装: 10,000
类型: 电阻
触摸面板接口: 4 线
输入数/键: 1 TSC
分辨率(位): 12 b
数据接口: 串行,SPI?
数据速率/采样率 (SPS,BPS): 105k
电压基准: 外部
电源电压: 1.6 V ~ 3.6 V
电流 - 电源: 10nA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 12-UFBGA,WLCSP
供应商设备封装: 12-WLCSP
包装: 带卷 (TR)
AD7879/AD7889
Rev. C | Page 31 of 40
SYNCHRONIZING THE AD7879/AD7889 TO THE
HOST CPU
The two methods for synchronizing the AD7879/AD7889 to its
host CPU are slave mode (in which the mode bits are set to 01
or 10) and master mode (in which the mode bits set to 11).
In master mode (ADC mode bits = 11), PENIRQ can be used
as an interrupt to the host. When PENIRQ goes low to indicate
that the screen has been touched, the host is awakened. The
host can then program the AD7879/AD7889 to convert in any
mode and read the results after the conversions are completed.
In master mode, INT or DAV can also be used as an interrupt to
the host. The host should first define a conversion sequence in
Control Register 3, initialize the AD7879/AD7889 in Mode 11,
and enable INT or DAV using Bit 15 in Control Register 1 and
Bit 13 in Control Register 3. The host can then enter sleep mode
to conserve power. The wake-up on touch feature of the
AD7879/AD7889 is active in this mode; therefore, when the
screen is touched, the programmed sequence of conversions
automatically begins. When the INT or DAV signal is asserted,
the host reads the new data available in the AD7879/AD7889
result registers and returns to sleep mode. This method can
significantly reduce the load on the host.
Figure 38 shows how the PENIRQ circuit is enabled. The wake-up
on touch circuit and the PENIRQ circuit are enabled only in master
mode (ADC mode = 11). In slave mode, the PENIRQ/INT/DAV
pin can output only INT or DAV signals.
ADC MODE = 11?
MASTER MODE
0
1
0
1
DAV
(END OF CONVERSION SEQUENCE)
INT
(GPIO ALERT/OUT OF LIMITS)
INT/DAV/GPIO ALERT
TOUCH SCREEN TOUCHED
CONTROL REGISTER 3
BIT 13
CONTROL REGISTER 1
BIT 15
PENIRQ/INT/DAV PIN
TO THE DIGITAL CORE
ENABLE
WAKE-UP
ON TOUCH
ENABLE
PENIRQ
DETECTION
CIRCUIT
TOUCH SCREEN TOUCHED
YES
07667-
037
Figure 38. Master Mode Operation
相关PDF资料
PDF描述
AD7889-1ACBZ-RL IC ADC 12BIT CTRLR TOUCH 12WLCSP
VE-BTV-IV-B1 CONVERTER MOD DC/DC 5.8V 150W
VE-BT0-IV-B1 CONVERTER MOD DC/DC 5V 150W
VE-B4H-IV-B1 CONVERTER MOD DC/DC 52V 150W
AD7879-1ACPZ-RL IC ADC 12BIT CTLR TOUCH 16LFCSP
相关代理商/技术参数
参数描述
AD7890ACHIPS-2 功能描述:Data Acquisition System (DAS) 12 bit 117k SPI Die 制造商:analog devices inc. 系列:- 包装:管件 零件状态:上次购买时间 类型:数据采集系统(DAS) 分辨率(位):12 b 采样率(每秒):117k 数据接口:SPI 电压源:单电源 电压 - 电源:5V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:模具 供应商器件封装:模具 标准包装:1
AD7890AN-10 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统(DAS) 分辨率(位):16 b 采样率(每秒):21.94k 数据接口:MICROWIRE?,QSPI?,串行,SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP(6x6) 包装:托盘
AD7890AN-2 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:否 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统(DAS) 分辨率(位):16 b 采样率(每秒):21.94k 数据接口:MICROWIRE?,QSPI?,串行,SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP(6x6) 包装:托盘
AD7890AN-4 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 24-Pin PDIP 制造商:Rochester Electronics LLC 功能描述:8 CHANNEL,SERIAL A/D IC - Bulk
AD7890ANZ-10 功能描述:IC DAS 12BIT 8CH 24-DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统(DAS) 分辨率(位):16 b 采样率(每秒):21.94k 数据接口:MICROWIRE?,QSPI?,串行,SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP(6x6) 包装:托盘