3222/3223-DB1 Silicon Laboratories Inc, 3222/3223-DB1 Datasheet - Page 5

• Manufacturer Part Number: 3222/3223-DB1
• Description: EVAL BOARD FOR IA3222/3223
• Manufacturer: Silicon Laboratories Inc
• Series: EZ DAA™r

Specifications of 3222/3223-DB1

• Main Purpose: Telecom, Data Acquisition Arrangement (DAA)
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: IA3222, IA3223
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.1. J1 Connector Pinout for the IA3222/3223 Demo Board
The ExtClk input can be used in order to synchronize the IA3222/3223 internal codecs with an external codec. This
helps prevent aliasing. Otherwise, the ExtClk input can be left open (there is an internal pull-down). The internal
oscillator must then be selected. Refer to the data sheet for internal or external clock register settings.
2.1.1. Jumper Setting
A single jumper is available on the IA3222/3223 Demo Board. When it is open, the state of the hook switch is
controlled by the serial port. When it is closed, the DAA goes off-hook regardless of the programmed hook-switch
state. If the Interposer is used, the jumper is not needed to go off-hook.
2.2. Automatic Operation
In order to evaluate the IA3222/3223 DAA chipset as a replacement of a DAA product with a static hook control
wire, the CPLD can recognize an active-high or active-low host command and produce the equivalent serial
command to the IA3223. The host command signal is to be connected on the Interposer board at the net named
tri_in, which is the common between R38 and R39. The leftmost switch of the SW1 bank (OFH) should be set to
the polarity of the hook command that corresponds to the off-hook state. If the off-hook command is active high,
OFH should be set to 1, and if the off-hook command is active low, OFH should be set to 0. At every transition of
the hook command (tri_in signal), all the IA3223 registers are loaded based on the state of the DIP switches and of
the hook command signal.
Manual operation is still possible with the hook command signal connected, but the meaning of the OFH DIP switch
differs between automatic and manual operation. When a transition of tri_in is detected, OFH indicates the polarity
of the off-hook command. When the write switch (SW5) is pushed momentarily, the state of OFH is copied to
IA3223 register 0, where a high level means off-hook, and a low level means on-hook.
*Note: See the IA3222/3223 data sheet for more information about differential or single-ended analog interfacing.
11, 12
13, 14
15, 16
17, 18
19, 20
Pin #
9, 10
1, 2
3, 4
5, 6
7, 8
21
22
LINESTATUS
SDOUT
ACREF
Name
Extclk
SDIN
GND
GND
SClk
VDD
CS
RX
TX
Table 2. J1 Connector Pin Descriptions*
Input/Output
Output
Output
Output
Power
Power
Power
Type
Input
input
Input
Input
Input
Preliminary Rev. 0.1
Optional external clock input for codec
Serial data clock input from interposer board
Chip select from interposer board
Serial data input from interposer board
Power supply 3.3 V from interposer board
Transmit analog input
Analog ac reference
Line status
Serial data output (register read)
Receive analog output
Chassis ground
Signal and system ground
IA3222/3223-EVB
Description
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