参数资料
型号: AD7879-1WACPZ-RL
厂商: Analog Devices Inc
文件页数: 24/41页
文件大小: 0K
描述: IC ADC 12BIT CTRLR TOUCH 16LFCSP
标准包装: 5,000
类型: 电阻
触摸面板接口: 4 线
输入数/键: 1 TSC
分辨率(位): 12 b
评估套件: *
数据接口: I²C,串行
数据速率/采样率 (SPS,BPS): 105k
电压基准: 内部
电源电压: 1.6 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-VQFN 裸露焊盘,CSP
供应商设备封装: 16-LFCSP-VQ EP(4x4)
包装: 带卷 (TR)
AD7879/AD7889
Rev. C | Page 29 of 40
TEMP
MASK
AUX/
VBAT
MASK
INT
MODE
GPIO
ALERT
AUX/
VBAT
LOW
AUX/
VBAT
HIGH
TEMP
HIGH
X+
Y+
Z1
Z2
AUX
VBAT TEMP
NOT
USED
07667-
031
0
15
TEMP
LOW
Figure 32. Control Register 3
CONTROL REGISTER 3
Control Register 3 (Address 0x03) includes the interrupt
register (Bits[15:8]) and the sequencer bits (Bits[7:0]).
Sequencer (Control Register 3, Bits[7:0])
The sequencer bits control which channels are converted during
a conversion sequence in both slave mode and master mode.
To include a measurement in a sequence, the relevant bit must
be set in the sequence. Setting Bit 7 includes a measurement on
the X+ channel (Y position). Setting Bit 6 includes a measure-
ment on the Y+ channel (X position), and so on (see Table 14).
Figure 32 illustrates the correspondence between the bits in
Control Register 3 and the various measurements. Bit 0 is
not used.
SLAVE MODE
CONVERSION
SEQUENCE
TIMER = 00?
START TIMER
WAIT FOR TIMER
SINGLE
CONVERSION
MASTER MODE
WAIT FOR
FIRST TOUCH
CONVERSION
SEQUENCE
SCREEN
TOUCHED?
TIMER = 00?
START TIMER
WAIT FOR TIMER
SCREEN
TOUCHED?
IDLE
ADC MODE?
10
YES
NO
YES
NO
11
00
07667-
032
01
Figure 33. Conversion Modes
FCD
REQ’D?
WAIT FOR
ACQUISITION
ACQ
SET CHANNEL
CONVERT DATA
AVERAGE DATA
TRANSFER DATA
TO REGISTERS
SET ALERT AND
INTERRUPT
1MEDIAN # MEANS MEDIAN
FILTER SIZE.
RANK NEW
DATA
(WAIT tSORT)
MEDIAN
# OF SAMPLES
TAKEN?1
NO
YES
07667-
033
START OF
CONVERSION
SEQUENCE
FCD
MAV FILTER
ENABLED
?
OUT-OF-
LIMIT?
END OF
SEQUENCE
?
YES
NO
YES
NO
Figure 34. Conversion Sequence
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