QSG-3717
HOLT INTEGRATED CIRCUITS
5
OPT2 switch 32 WPS
Open = 32 WPS (overrides all other rates).
Closed = Rate follows BitRate0, BitRate1 and Bitrate2 switch settings.
Bit Rate DIP switches
BitR-2
BitR-1
BitR-0
WORD RATE
Slew Rate
0
0
0
64
7.5uS
0
0
1
128
7.5uS
0
1
0
256
7.5uS
0
1
1
512
7.5uS
1
0
0
1024
1.5uS
1
0
1
2048
1.5uS
1
1
0
4096
1.5uS
1
1
1
8192
1.5uS
(0=CLOSED, 1=OPEN)
Push Buttons SW1-SW4
Depending on the selected mode, these buttons perform specific tasks.
DEMO Setup Instructions:
Set the DIP switches for
Transmit Receive Mode SELF-TEST (Mode- 2)
.
In Mode -2 the program transmits SYNC words and incrementing data. The receiver fetches this data
and displays it on the console. Because the TEST bit is set in the Control Register 1 the line receiver and
both line drivers are disabled. The transmitted and received data will be looped back digitally. No signals
will be visible on the transmitter outputs.
Configure the Bit Rate DIP switches for 64 WPS ensuring that OPT2 is closed.
Open OPT1 DIP switch to configure the receiver for BPRZ mode.
After a power on reset, the program revision is displayed on the LEDs for two seconds in binary format,
where LED1 is the LSB. After two seconds, they LEDs turn off, then LED7 flashes every second as the
main MCU “live” operating indicator.
A message is also sent to the Console Port.
Some of the displayed information reflects the options
selected by the Dip switches.
After resetting the board the program sends information to the console to summarize the configuration,
Receiver Mode, Word Rate and Slew Rate.
