82P33731/33831 Evaluation Board
USER GUIDE
Introduction
The 82P33731/33831 evaluation board is designed to help the customer evaluate the IDT82P33731 and IDT82P33831 devices.
This user guide will accomplish the following:
•
•
•
•
Introduce the board on its power supply and jumper settings
Describe the input and output connectors for normal operation
How to bring up the board by using Timing Commander software GUI
How to configure and program the board to generate standard-compliant frequencies
Board Overview
Use
Figure 1
to identify various components of the board: Input and output SMA connectors; Power supply jacks and some
jumper settings necessary for the board operations. Detailed descriptions are as follows:
•
Input SMA Connectors –
There are a total of 14 inputs, of which IN1, 2 are AMI inputs; IN9, 10, 11, 12, 13, 14 are
single-ended inputs; IN3, 4, 5, 6, 7, 8 are differential inputs.
•
Output SMA Connectors
– There are a total of 12 outputs, of which OUT1, 2, 7, 9, 10 are single-ended outputs; OUT3, 4, 5,
6, 11, 12 are differential outputs; OUT8 is an AMI output.
•
USB connector –
Type-B connector for GUI communications. No power is drawn from USB connector other than to power
the FTDI USB chip.
•
Dip Switch SW6 –
Used to configure EEPROM write protection, master or slave selection and communication protocols
between PC/GUI and the board. For typical I
2
C mode, set MPU_MODE[1:0] = 00 ('I2C ON').
•
J76 –
This is a 2x12 pin header used to set communication mode between PC and the board.
Table 1
shows how to jump the
header pairs for the intended mode. Use JP18 (described below) to set I
2
C mode by default.
Table 1: Jumper Setting on J76
FTDI SPI
3-4 Jumper
9-10 Jumper
15-16 Jumper
21-22 Jumper
Aardvark SPI/I2C
1-3 Jumper
7-9 Jumper
13-15 Jumper
19-21 Jumper
FTDI I2C
3-4 Jumper
9-10 Jumper
14-16 Jumper
Motherboard SPI/I2C
3-5 Jumper
9-11 Jumper
15-17 Jumper
21-23 Jumper
FTDI UART
4-6 Jumper
9-10 Jumper
15-16 Jumper
FTDI to Aardvark
1-2 Jumper
7-8 Jumper
13-14 Jumper
19-20 Jumper
•
JP18
– By default, I
2
C mode will be selected with JP18 shunted (jumped).
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©2014 Integrated Device Technology, Inc.
82P33731/33831 EVALUATION BOARD
Figure 1. Board Overview
•
APLL3 Crystals
– Crystals for APLL3 in the device. Three frequencies are supported – 24.8832MHz, 25MHz and
25.78125MHz – generating three different mode frequencies for SONET, Ethernet and Ethernet LAN, respectively. On the
board, two crystals are installed and supported at the same time.
•
OSCI input and XO –
System reference clock input. Refer to JP9 for clock source selection. The frequency of this input clock
is selected by XO_FREQ[2:0] pins described in SW5.
•
HW Reset button –
Pressing this button will reset the device to default condition.
•
JP9 –
3-pin header used to select the system reference clock to be from OSCI or XO. Please see board silkscreen for source
selection.
•
Dip Switch SW5 –
This dip switch contains the following bit configurations:
◦
System clock frequency selection – switch the 3 bits to match OSCI frequency. Default frequency is 12.8MHz.
Table 2: OSCI frequency Selections by SW5
XO_FREQ[2:0]
Osc Frequency
(MHz)
000
10.0
001
12.8
010
13.0
011
19.44
100
20.0
101
24.576
110
25.0
111
30.72
◦
SONET/SDH selection:
This bit determines the value of IN_SONET_SDH during reset.
◦
I
2
C address bits:
I2C_AD[2:1] sets the lower 3-bit address of 7-bit I2C address with the least significant bit, I2C_AD0
being ignored. Higher 4 bits is fixed at 4'b1010. This only applies to I
2
C mode (MPU_MODE[1:0] = 00 in SW6).
•
AC/DC Power Jack –
Using a wall adapter AC/DC power supply (output 5VDC/3A with center-positive jack) can power the
board, if 5VDC Power Jack is not supplied with a 5VDC power source.
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82P33731/33831 EVALUATION BOARD
•
5VDC Power Jack –
If AC/DC power source is not used, a 5VDC power source can be plugged into the jack to power the
board. Please note: Power Jacks labeled 3.3V and 1.8V are for other purposes. They can be left unused.
•
5VDC Ground Jack –
Paired with 5VDC Power Jack (above) to provide power return when 5VDC bench power supply is
used.
Board Power Supply
There are two ways to power up the board:
•
Use an AC/DC adapter which provides 5VDC to on-board voltage regulators to generate 3.3V and 1.8V.
•
Connect a 5VDC power source (i.e., a bench power supply) to the power jack that is labeled s “5V”.
There are power jacks labeled 3.3V and 1.8V. Do not use them to power the board. They are connected to the output of 3.3V
and 1.8V voltage regulators powered by either J54 or the 5VDC power jack. They can be supplied with 3.3V and 1.8V to power
the board but only if 5V is not supplied. They are used for testing purposes only; it is not recommended to use them.
USB connector is only used for communicating with the PC running Timing Commander. It is not used to provide any power
source for the board. When plugged in to PC's USB port, a green LED is lit.
Connecting the Board to PC and Power
Other than input and output cables, the only connection you need to make to operate the board is a USB cable connecting to a
PC USB port, and a power supply connection (either an AC/DC adapter or a 5VDC power source, as described above). See
Figure 2
below for different powering options.
Figure 2. Connecting the Board to the Power Supply and USB Port
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82P33731/33831 EVALUATION BOARD
On-Board Crystal Installation
Although three crystal frequencies (24.88320MHz, 25.00000MHz and 25.78125MHz) are supported for APLL3, only two crystals
are installed on the board.
Table 3
lists the crystals with different frequencies installed on two versions of 82P33x31 evaluation
boards.
Table 3: Crystals installed on Two Versions of 82P33x31 Boards
EVB
82EBP33831-1
82EBP33831-2
12.8MHz TCXO
E6241LF
E6241LF
X1
25.000MHz
24.8832MHz
X2
24.576MHz
25.78125MHz
Board Default Frequency Output
Upon power-up, the following default frequencies will be available:
•
•
•
•
•
OUT1 = 25MHz
OUT2 = 125MHz
OUT3 = 156.25MHz
FRSYNC = 8kHz
MFRSYNC = 2kHz
Working with TimingCommand for Configuration
Use the following steps to start the configuration of the Timing Commander GUI and program the board using I
2
C:
1. Connect the board as shown in
Figure 2.
Press hardware reset button to reset the device. Reset is not necessary if the
board is powered up for the first time).
2. Start Timing Commander® software. You will see options of “New Setting File” and “Open Setting file”. For a new
configuration, select “New Setting File”.
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82P33731/33831 EVALUATION BOARD
Figure 3. Starting up Timing Commander GUI
3. After selecting “New Settings File”, a device selection window will pop up. In the window, choose the intended device in
the list (82P33831 was selected in the following example). Click the button at the lower right corner of the window to
browse and select the correct personality file, then click OK.
Note:
Due to the hardware structure of the chip, two personality files will need to be used to configure and program
82P33x31 board: (1) IDT82P33x31_v1.0_TC_1.5.1.2.tcp; (2) IDT82P33x31_APLL3_v1.0_TC_v1.5.1.2.tcp. To begin
with, use the personality file (1). See
Figure 4
below.
Personality file (2) is used only for programming APLL3 and is deferred until Step 9 below.
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