SI8900-1 SILABS [Silicon Laboratories], SI8900-1 Datasheet - Page 17

• Manufacturer Part Number: SI8900-1
• Description: ISOLATED MONITORING ADC
• Manufacturer: SILABS [Silicon Laboratories]

4.4. Master Controller Firmware
The user's master controller must include firmware to manage the Si890x Demand and Burst operating modes and
serial port control. In some cases, the master controller may also require a firmware moving average function to
reduce noise. For more information on master controller firmware, see AN638, available for download at
www.silabs.com/isolation.
D7 D6 D5 D4 D3 D2 D1 D0
1
D7 D6 D5 D4 D3 D2 D1 D0
1
1
Master to Slave
Slave to Master
1
Command Byte
CNFG_0 Write
Command Byte
CNFG_0 Write
‐
‐
Delay
8µS
Delay
8µS
D7 D0 D7 D0
1
Si8902 CNFG_0
1
Read Byte
D7 D6 D5 D4 D3 D2 D1 D0
1
Figure 14. Si8902 ADC Read Operation
Si8902 CNFG_0 Read Byte
1
‐
B) Si8902 ADC Demand Mode Read
A) Si8902 CNFG_0 Command Byte
1
C) Si8902 ADC Burst Mode Read
0
D7 D6 D5 D4 D3 D2 D1 D0
‐
1
1
Command Byte
CNFG_0 Write
Rev. 1.0
D7 D6 D5 D4 D3 D2 D1 D0
1
0
Periodic ADC Data
D7 D0 D7 D0 D7 D0
0
‐
0
ADC Data
1 0
D7 D6 D5 D4 D3 D2 D1 D0
0
Si8900/1/2
0
0
0
17