SI3220-KQ Silicon Laboratories Inc, SI3220-KQ Datasheet - Page 73

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

Specifications of SI3220-KQ

• 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: 0°C ~ 70°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: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Number Of Channels: 2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

General Circuit Interface
The Dual ProSLIC devices also contain an alternate
communication interface to the SPI and PCM control
and data interface. The general circuit interface (GCI) is
used for the transmission and reception of both control
and data information onto a GCI bus. The PCM and GCI
interfaces are both four-wire interfaces and share the
same pins. The SPI control interface is not used as a
communication interface in the GCI mode, but rather as
hard-wired channel selector pins. The selection
between PCM and GCI modes is performed out of reset
using the SDITHRU pin. Tables 40 and 41 illustrate how
to select the communication mode and how the pins are
used in each mode.
Table 41. Pin Functionality in PCM or GCI Mode
SDITHRU SCLK
Note: Values shown are the states of the pins at the rising
Pin Name
CS
SCLK
SDI
SDO
SDITHRU
FSYNC
PCLK
DTX
DRX
Note: This table denotes pin functionality after the rising
0
0
1
Table 40. PCM or GCI Mode Selection
edge of RESET.
edge of RESET and mode selection.
PCM Mode
SPI Chip Select
SPI Clock Input
SPI Serial Data Input Channel Selector,
SPI Serial Data
Output
SPI Data Through-
put pin for Daisy
Chaining Operation
(Connects to the SDI
pin of the subse-
quent device in the
daisy chain)
PCM Frame Sync
Input
PCM Input Clock
PCM Data Transmit
PCM Data Receive
0
1
x
GCI Mode—1x PCLK (2.048 MHz)
GCI Mode—2x PCLK (4.096 MHz)
Mode Selected
PCM Mode
GCI Mode
Channel Selector,
bit 0
PCLK Rate
Selector
bit 2
Channel Selector,
bit 1
PCM/GCI Mode
Selector
GCI Frame Sync
Input
GCI Input Clock
GCI Data Transmit
GCI Data Receive
Preliminary Rev. 0.91
If GCI mode is selected, the following pins must be tied
to the correct state to select one of eight sub-frame
timeslots in the GCI frame (described below). These
pins must remain in this state while the Dual ProSLIC is
operating. Selecting a particular subframe causes that
individual Dual ProSLIC device to transmit and receive
on the appropriate sub-frame in the GCI frame, which is
initiated by an FSYNC pulse. No further register settings
are needed to select which sub-frame a device uses,
and the sub-frame for a particular device cannot be
changed while in operation.
In GCI mode, the PCLK input requires either a
2.048 MHz or a 4.096 MHz clock signal, and the
FSYNC input requires an 8 kHz frame sync signal. The
overall unit of data used to communicate on the GCI
highway is a frame 125 µ s in length. Each frame is
initiated by a pulse on the FSYNC pin, whose rising
edge signifies the beginning of the next frame. In 2x
PCLK mode, the user sees twice as many PCLK cycles
during each 125 µ s frame versus 1x PCLK mode. Each
frame consists of eight fixed timeslot sub-frames, which
are assigned by the Sub-Frame Select pins as
described above (SDI, SDO, and CS). Within each sub-
frame are four channels (bytes) of data, including two
voice data channels B1 and B2, one Monitor channel M
used for initialization and setup of the device, and one
Signaling
communicating status of the device and for initiating
commands. Within the SC channel are six Command/
GCI Subframe 0 Selected
(Voice channels 1–2)
GCI Subframe 1 Selected
(Voice channels 3–4)
GCI Subframe 2 Selected
(Voice channels 5–6)
GCI Subframe 3 Selected
(Voice channels 7–8)
GCI Subframe 4 Selected
(Voice channels 9–10)
GCI Subframe 5 Selected
(Voice channels 11–12)
GCI Subframe 6 Selected
(Voice channels 13–14)
GCI Subframe 7 Selected
(Voice channels 15–16)
Table 42. GCI Mode Sub-Frame Selection
and
Control
Si3220/Si3225
channel
SDI
1
1
1
1
0
0
0
0
SDO
(SC)
1
1
0
0
1
1
0
0
used
CS
1
0
1
0
1
0
1
0
for
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