SI3220-BQ Silicon Laboratories Inc, SI3220-BQ Datasheet - Page 63

• Manufacturer Part Number: SI3220-BQ
• Description: IC SLIC/CODEC DUAL-CH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: ProSLIC®r

Specifications of SI3220-BQ

• Package / Case: *
• Function: Subscriber Line Interface Concept (SLIC), CODEC
• Interface: GCI, PCM, SPI
• Number Of Circuits: 2
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 65mA
• Power (watts): 941mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Includes: Battery Switching, BORSCHT Functions, DTMF Generation and Decoding, FSK Tone Generation, Modem and Fax Tone Detection
• Product: Telecom
• Supply Voltage (min): 3.13 V
• Supply Current: 22 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

The control byte has the following structure and is presented on the SDI pin MSB first.
The bits are defined as follows:
3:0
7
6
5
4
BRDCST
REG/RAM Register/RAM Access Bit.
Reserved
BRDCST Indicates a broadcast operation that is intended for all devices in the daisy chain. This is
CID[3:0]
7
R/W
only valid for write operations, since it would cause contention on the SDO pin during a
read.
Read/Write Bit.
0 = Write operation.
1 = Read operation.
0 = RAM access.
1 = Register access.
Indicates the channel that is targeted by the operation. The 4-bit channel value is provided
LSB first. The devices reside on the daisy chain such that device 0 is nearest to the con-
troller and device 15 is furthest down the SDI/SDU_THRU chain. (See Figure 41.)
As the CID information propagates down the daisy chain, each channel decrements the
CID by 1. The SDI nodes between devices reflects a decrement of 2 per device since each
device contains two channels. The device receiving a value of 0 in the CID field responds
to the SPI transaction. (See Figure 42.) If a broadcast to all devices connected to the chain
is requested, the CID does not decrement. In this case, the same 8-bit or 16-bit data is pre-
sented to all channels regardless of the CID values.
R/W
6
REG/RAM Reserved
5
Table 37. SPI Control Interface
Preliminary Rev. 0.91
4
CID[0]
3
CID[1]
2
Si3220/Si3225
CID[2]
1
CID[3]
0
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