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參數(shù)資料
| 型號： | AD7877ACPZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費家電 |
| 英文描述： | 16-Bit, Pseudo Bipolar, Fully Diff Input, 250kSPS Serial Out, 2.7V to 5.5V Micro Power Sampling ADC 8-MSOP -40 to 85 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, ROHS COMPLIANT, MO-220VHHD-2, LFCSP-32 |
| 文件頁數(shù)： | 41/44頁 |
| 文件大?。?/td> | 1002K |
| 代理商： | AD7877ACPZ-REEL7 |
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AD7877
GPIO REGISTERS
GPIO registers are written to using an extended 8-bit address.
The first four bits of the data-word are always 1111b to access
the extended writing map. The next four bits are the register
address. This leaves 8 bits for the GPIO data.
Rev. A | Page 41 of 44
GPIO registers are read like all other registers, by writing a 5-bit
address to Control Register 1, then reading DOUT.
See the GPIO Configuration section for information on
configuring the GPIOs.
Register Name: GPIO Control Register 1
Write Address: [1111] 0000; Read Address: 11011; Default Value: 0x000.
Table 22.
Read/
Write
0
GPIO2_ALEN
R/W
Bit
Name
Description
If this bit is 1, GPIO2 is an interrupt source for the ALERT output.
Clearing this bit masks out GPIO2 as an interrupt source for the ALERT output.
This bit sets the direction of GPIO2.
0 = Output
1 = Input
This bit determines if GPIO2 is active high or low.
0 = Active low
1 = Active high
This bit selects the function of AUX2/GPIO2.
0 = AUX2
1 = GPIO2
If this bit is 1, GPIO1 is an interrupt source for the ALERT output.
Clearing this bit masks out GPIO1 as an interrupt source for the ALERT output.
This bit sets the direction of GPIO1.
0 = Output
1 = Input
This bit determines if GPIO1 is active high or low.
0 = Active low
1 = Active high
This bit selects the function of AUX1/GPIO1.
0 = AUX1
1 = GPIO1
1
GPIO2_DIR
R/W
2
GPIO2_POL
R/W
3
GPIO2_EN
R/W
4
GPIO1_ALEN
R/W
5
GPIO1_DIR
R/W
6
GPIO1_POL
R/W
7
GPIO1_EN
R/W
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