參數(shù)資料
型號: EVAL-AD7877EB
廠商: Analog Devices, Inc.
英文描述: Touch Screen Controller
中文描述: 觸摸屏控制器
文件頁數(shù): 31/44頁
文件大?。?/td> 1002K
代理商: EVAL-AD7877EB
AD7877
If the ALERT source is an out-of-limit measurement, writing a 0
to the corresponding status bit in the alert status/enable register
causes ALERT to go high. However, the status bit is set to 1
Table 12. GPIO Configuration
EN
DIR
0
X
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Rev. A | Page 31 of 44
again on the next measurement cycle, if the measurement
remains out of limit. The ALERT source can also be masked by
clearing the relevant bit in the alert status/enable register to 0.
POL
ALEN
Data Bit
1
Pin Voltage
2
ALERT
X
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
0
1
0
1
0
1
0
1
1
0
1
0
0
1
0
1
X
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
X
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
0
1
Shaded data values indicate that a change in input voltage on the pin causes a change in the data register bit.
2
Shaded pin voltage values indicate that a change in the data register causes a change in the output voltage on the pin.
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