参数资料
型号: EVAL-AD7280AEDZ
厂商: Analog Devices Inc
文件页数: 40/48页
文件大小: 0K
描述: BOARD EVAL FOR AD7280
标准包装: 1
主要目的: 电源管理,电池监控器
嵌入式:
已用 IC / 零件: *
主要属性: *
次要属性: SPI 接口
已供物品:
AD7280A
Example 3: Convert and Read All Parts, All Voltages,
and Three Auxiliary ADC Inputs per Part
In this example, it is assumed that all AD7280As in the daisy
chain have been initialized to their correct device addresses.
3.
Program the CNVST control register to 0x02 on all parts
to allow conversions to be initiated using the CNVST pin.
The 32-bit write command is 0x03A0546A (see Table 25 ,
Write 3).
1.
2.
Write Register Address 0x00 to the read register on all
parts. A device address of 0x00 is used when computing
the CRC for commands to write to all parts. The 32-bit
write command is 0x038011CA (see Table 25, Write 1).
Note that 0x00 is the default value of the read register on
power-up and after a software reset; therefore, this write
operation may not be necessary.
Set Bit D15 and Bit D13 of the control register to 0 on all
4.
5.
Initiate conversions through the falling edge of CNVST.
Allow sufficient time for all conversions to be completed
plus t WAIT . Following the completion of all conversions,
apply a CS low pulse that frames 32 SCLKs for each conver-
sion result to be read back. The 32-bit write command is
0xF800030A, as described in the Serial Interface section
(see Table 25 , Write 4).
parts. Set Bit D14 and Bit D12 of the control register to 1
on all parts. The 32-bit write command is 0x01AA1062
(see Table 25, Write 2).
Table 25. Example 3: Converting and Reading All Voltages and Three Auxiliary ADC Inputs from All AD7280A Devices
32-Bit Write
Write Command
Write 1
Write 2
Write 3
Write 4
Device Address
00000
00000
00000
11111
Register Address
011100
001101
011101
000000
Data
00000000
01010000
00000010
00000000
Write All
1
1
1
0
D11
0
0
0
0
8-Bit CRC
00111001
00001100
10000101
01100001
D2 to D0
010
010
010
010
Command
0x038011CA
0x01AA1062
0x03A0546A
0xF800030A
Rev. 0 | Page 40 of 48
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