si3200-x-gs Silicon Laboratories, si3200-x-gs Datasheet - Page 54

• Manufacturer Part Number: si3200-x-gs
• Description: Dual Programmable Cmos Slic With Line Monitoring
• Manufacturer: Silicon Laboratories

Si3232
In Figure 28, the CID field is 0. As this field is decremented (LSB to MSB order), the value decrements for each SDI
down the line. The BRDCST, R/W, and REG/RAM bits remain unchanged as the control word passes through the
entire chain. The odd SDIs are internal to the device and represent the SDI to SDI_THRU connection between
channels of the same device. A unique CID is presented to each channel, and the channel receiving a CID value of
0 is the target of the operation (channel 0 in this case). The last line of Figure 28 illustrates that in broadcast mode,
all bits are passed through the chain without permutation.
54
SDI0
SDI1 (Internal)
SDI2
SDI3 (Internal)
SDI 0-15
SDI15
SDI0-15
CS
SCLK
SDI
SDO
Figure 28. Sample SPI Control Word to Address Channel 0
Figure 29. Register Write Operation via an 8-Bit SPI Port
CONTROL
BRDCST
0
0
0
0
0
0
1
R/W
A
A
A
A
A
A
A
REG/RAM
Preliminary Rev. 0.96
SPI Control Word
B
B
B
B
B
B
B
ADDRESS
Reserved
C
C
C
C
C
C
C
CID[0]
D
0
1
0
1
0
1
CID[1]
DATA [7:0]
0
1
1
0
1
0
E
CID[2]
0
1
1
1
0
0
F
CID[3]
Hi-Z
G
0
1
1
1
0
0