5
5.0 Serial Programming Interface and Registers
5.1 Serial Interface
The Bt860/861 uses a 2-wire serial programming interface to program the device
registers. The interface operates at 3.3 V or 5.0 V input levels. Figure 5-1
illustrates the timing relationship between Serial Interface Data (SID) and Serial
Interface Clock (SIC) lines. If the bus is not being used, both SID and SIC lines
must be pulled high.
Figure 5-1. Serial Programming Interface Timing Diagram
Subsequent Bytes and Acknowledge
Interpreted as Data Values for
Auto-Incrementing Subaddress Locations
SIC
SID
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
(1)
(1)
(1)
Slave
Address
Data
Subaddress
NOTE(S):
(1)
Acknowledge generated by Bt860/861.
861_024
D860DSA
Conexant
5-1
CONEXANT [ CONEXANT SYSTEMS, INC ]
