SI3050-KT Silicon Laboratories Inc, SI3050-KT Datasheet - Page 46

• 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

Si3050
Figure 37 and Figure 38 illustrate WRITE and READ operations via an 8-bit SPI controller. Each of these
operations are performed as a 3-byte transfer. The CS pin is asserted between each byte. The CS pin must be
asserted before the first falling edge of SCLK after the DATA byte to indicate to the state machine that only one
byte should be transferred. The state of the SDI pin is ignored during the DATA byte of a read operation.
Figures 39 and 40 illustrate WRITE and READ operations via a 16-bit SPI controller. These operations require a
4-byte transfer arranged as two 16-bit words. The CS pin does not go high when the eighth bit of data is received,
which indicates to the SPI state machine that eight more SCLK pulses follow to complete the operation. In the case
of a WRITE operation, the last eight bits are ignored. In a read operation, the 8-bit data value is repeated so that
the data may be captured during the last half of a data transfer if required by the controller. The Si3050 autodetects
the SPI mode (16-bit or 8-bit mode).
46
CS B
S CLK
S DI
S DO
CS B
S CLK
S DI
S DO
CSB
SCLK
SDI
SDO
CONTROL
CONTROL
CONTROL
Figure 38. Read Operation via an 8-bit SPI Port
Figure 39. Write Operation via a 16-bit SPI Port
Figure 40. Read Operation via a 16-bit SPI Port
A DDRE S S
A DDRE S S
Rev. 1.0
ADDRESS
Data [7:0]
X X X X X X X X
Data [7:0]
S am e byte repeated twice.
XXXXXXXXXXXX
X X X X X X X X
Data [7:0]
X X X X X X X X
Data [7:0]
Hi - Z