CMX7163 QAM Modem
CMX7163
C-BUS single byte command (no data)
CSN
Note:
The SCLK line may be high or
low at the start and end of each
transaction.
SCLK
CDATA
RDATA
7
MSB
6
5
4
3
2
2
2
1
1
1
0
LSB
Address
Hi-Z
C-BUS n-bit register write
CSN
SCLK
CDATA
RDATA
7
MSB
6
5
4
3
0
LSB
n-1 n-2 n-3
2
1
0
MSB
LSB
Address
Write data
Hi-Z
C-BUS n-bit register read
CSN
SCLK
CDATA
RDATA
7
MSB
6
5
4
3
0
LSB
Address
Hi-Z
n-1 n-2 n-3
2
1
0
MSB
LSB
Read data
Data value unimportant
Repeated cycles
Either logic level valid (and may change)
Either logic level valid (but must not change from low to high)
Figure 8 Basic C-BUS Transactions
2014 CML Microsystems Plc
Page 20
D/7163_FI-4.x/12
CMLMICRO [ CML MICROCIRCUITS ]
