参数资料
型号: EVAL-AD7747EBZ
厂商: Analog Devices Inc
文件页数: 6/28页
文件大小: 0K
描述: BOARD EVAL FOR AD7747
标准包装: 1
传感器类型: 触摸,电容式
接口: I²C
电源电压: 2.7 V ~ 5.25 V
嵌入式:
已供物品: 板,缆线,CD
已用 IC / 零件: AD7747
产品目录页面: 781 (CN2011-ZH PDF)
相关产品: AD7747ARUZ-REEL7-ND - IC CONV CAP TO DIG 24BIT 16TSSOP
AD7747ARUZ-REEL-ND - IC CONV CAP TO DIG 24BIT 16TSSOP
AD7747ARUZ-ND - IC CONV 24BIT CAP-DGTL 16-TSSOP
AD7747
Rev. 0 | Page 14 of 28
REGISTER DESCRIPTIONS
The master can write to or read from all of the AD7747 registers
except the address pointer register, which is a write-only
register. The address pointer register determines which register
the next read or write operation accesses. All communications
with the part through the bus start with an access to the address
pointer register. After the part has been accessed over the bus
and a read/write operation is selected, the address pointer
register is set up. The address pointer register determines from
or to which register the operation takes place. A read/write
operation is performed from/to the target address, which then
increments to the next address until a stop command on the bus
is performed.
Table 8. Register Summary
Address
Pointer
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
(Dec)
(Hex)
Dir
Default Value
RDY
RDYVT
RDYCAP
Status
0
0x00
R
0
1
Cap Data H
1
0x01
R
Capacitive channel data—high byte, 0x00
Cap Data M
2
0x02
R
Capacitive channel data—middle byte, 0x00
Cap Data L
3
0x03
R
Capacitive channel data—low byte, 0x00
VT Data H
4
0x04
R
Voltage/temperature channel data—high byte, 0x00
VT Data M
5
0x05
R
Voltage/temperature channel data—middle byte, 0x00
VT Data L
6
0x06
R
Voltage/temperature channel data—low byte, 0x00
CAPEN
CAPDIFF
Cap Setup
7
0x07
R/W
0
VTEN
VTMD1
VTMD0
EXTREF
VTSHORT
VTCHOP
VT Setup
8
0x08
R/W
0
EXCDAC
EXCEN
EXCLVL1
EXCLVL0
EXC Setup
9
0x09
R/W
0
1
VTFS1
VTFS0
CAPFS2
CAPFS1
CAPFS0
MD2
MD1
MD0
Configuration
10
0x0A
R/W
1
0
1
0
DACAENA
DACA—6-Bit Value
Cap DAC A
11
0x0B
R/W
0
0x00
DACBENB
DACB—6-Bit Value
Cap DAC B
12
0x0C
R/W
0
0x00
Cap Offset H
13
0x0D
R/W
Capacitive offset calibration—high byte, 0x80
Cap Offset L
14
0x0E
R/W
Capacitive offset calibration—low byte, 0x00
Cap Gain H
15
0x0F
R/W
Capacitive gain calibration—high byte, factory calibrated
Cap Gain L
16
0x10
R/W
Capacitive gain calibration—low byte, factory calibrated
Volt Gain H
17
0x11
R/W
Voltage gain calibration—high byte, factory calibrated
Volt Gain L
18
0x12
R/W
Voltage gain calibration—low byte, factory calibrated
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