AMC7820 Datasheet, PDF (23/28 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL

Figure 13 shows an example of a complete data transaction
between the host processor and the AMC7820.
AMC7820 MEMORY MAP
The AMC7820 has several 16-bit registers that allow control
of the device as well as providing a location for results from
the AMC7820 to be stored until read by the host micropro-
cessor. These registers are separated into two pages of
memory in the AMC7820: a Data page (Page 0) and a
Control page (Page 1). The memory map is shown in Tables
III and IV. Locations that are marked reserved will read back
0x0000 if they are read by the host.
SS
SCLK
MOSI
MISO
Write Operation
Command Word
Data
Read Operation
Command Word
Data
Data
FIGURE 13. Write and Read Operation of the AMC7820 Interface.
PAGE 0: DATA REGISTERS
ADDRESS
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
REGISTER
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
Reserved
DAC0
DAC1
DAC2
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
TABLE III. AMC7820 Memory Map: Page 0.
PAGE 1: CONTROL REGISTERS
ADDRESS
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
REGISTER
Shut Down
Reset
Configuration/Status
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
TABLE IV. AMC7820 Memory Map: Page 1.
AMC7820
23
SBAS231B
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