SI3232-BQ Silicon Laboratories Inc, SI3232-BQ Datasheet - Page 52

• Manufacturer Part Number: SI3232-BQ
• Description: IC SLIC PROG DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3232-BQ

• Package / Case: *
• Function: Subscriber Line Interface Concept (SLIC)
• Interface: ISDN
• Number Of Circuits: 2
• Voltage - Supply: 3.13 V ~ 3.47 V
• Current - Supply: 28mA
• Power (watts): 280mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Product: SLIC
• Supply Voltage (min): 3.13 V
• Supply Current: 28 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Si3232
Figures 29 and 30 illustrate WRITE and READ
operations to registers via an 8-bit SPI controller. These
operations are each performed as a 3-byte transfer. CS
is asserted between each byte. It is necessary for CS to
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 SDI is a
“don’t care” during the DATA byte of a read operation.
Figures 31 and 32 illustrate WRITE and READ
operation to registers via a 16-bit SPI controller. These
operations require a 4-byte transfer arranged as two 16-
bit words. The absence of CS going high after the eighth
bit of data indicates to the SPI state machine that eight
more SCLK pulses will follow to complete the operation.
52
CS
SCLK
SDI
SDO
CS
SCLK
SDI
SDO
CS
SCLK
SDI
SDO
CONTROL
Figure 30. Register Read Operation via an 8-Bit SPI Port
Figure 31. Register Write Operation via a 16-Bit SPI Port
Figure 32. Register Read Operation via a 16-Bit SPI Port
CONTROL
CONTROL
ADDRESS
ADDRESS
Preliminary Rev. 0.95
ADDRESS
In the case of a WRITE operation, the last eight bits are
ignored. In the case of a read operation, the 8-bit data
value is repeated so that the data can be captured
during the last half of a data transfer if so desired by the
controller.
During register accesses, the CONTROL, ADDRESS,
and DATA are captured in the SPI module. At the
completion of the ADDRESS byte of a READ access,
the contents of the addressed register are moved into
the data register in the SPI. At the completion of the
DATA byte of a WRITE access, the data is transferred
from the SPI to the addressed register location.
Data [7:0]
X X X X X X X X
Data [7:0]
Same byte repeated twice.
X X X X X X X X
X X X X X X X X
Data [7:0]
X X X X X X X X
Data [7:0]
Hi - Z