SI3050-KT Silicon Laboratories Inc, SI3050-KT Datasheet - Page 45

• Manufacturer Part Number: SI3050-KT
• Description: IC VOICE DAA GCI/PCM/SPI 20TSSOP
• Manufacturer: Silicon Laboratories Inc
• Type: Chipsetr

Specifications of SI3050-KT

• Package / Case: 20-TSSOP
• Function: Data Access Arrangement (DAA)
• Interface: PCM, Serial, SPI
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 8.5mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Includes: Line Voltage Monitor, Loop Current Monitor, Overload Detection, Parallel Handset Detection, Polarity Reversal Detection, TIP and
• Product: Modem Chip
• Supply Voltage (min): 3 V
• Supply Current: 8.5 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

In Figure 35 the CID field is 0. As this field is decremented in LSB to MSB order, the value decrements for each SDI
down the line. The BRCT and R/W bits remain unchanged as the control word passes through the entire chain. A
unique CID is presented to each device, and the device receiving a CID value of 0 is the target of the operation
(channel 0 in this case). Figure 36 illustrates that in broadcast mode, all bits pass through the chain without
permutation.
SDI0
SDI1
SDI2
SDI3
SDI14
SDI15
SDI0-15
CS B
S CLK
S DI
S DO
Figure 36. Sample SPI Control Byte for Broadcast Mode (Write Only)
Figure 35. Sample SPI Control Byte to Access Channel 0
BRCT
CONTROL
0
0
0
0
0
0
1
Figure 37. Write Operation via an 8-bit SPI Port
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
0 or 1
R/W
0
1
1
1
1
1
1
1
1
SPI Control Byte
A DDRE S S
Rev. 1.0
0
0
0
0
0
0
0
0
CID[0]
X
0
1
0
1
0
1
DA TA [7:0]
CID[1]
X
0
1
1
0
1
0
X
CID[2]
0
1
1
1
0
0
Si3050
Hi-Z
X
CID[3]
0
1
1
1
0
0
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