Development Kit
2.6 Configuration Switch Bank
Switch module SW1 contains 6 independent switches. It is used to configure the PLD on the
evaluation board. The PLD controls how the signals from the XPort™ are routed on the
evaluation board. Positions 1 and 6 are for self-test. Positions 2 through 5 are for configuring
XPort™ pins for various operations.
Three XPort™ pins are designated as Configurable Pins and these pins can be configured
for hardware flow control or handshaking, or as LED status indicators. To configure the
Configurable Pins CP1, CP2, and CP3, see
Note:
SW1
switch positions are designated SW1-1 through SW1-6. Configurable Pins are
shown as CP1, CP2, CP3.
Table 6 - Configuration Switch Settings
SW1 POS FUNCTION
ON SW1-1 & SW1-6 ON for self-test mode. (Factory Test)
1
OFF Normal mode.
ON SW1-1 & SW1-6 ON for self-test mode. (Factory Test)
6
OFF Normal mode.
OFF XPort™ CP1 (pin 6) connected to RS232 transceiver, which connects to CTS
of an attached DTE device through DB-9 pin 8. Use this if CP1 is set up for
hardware flow control.
2
ON XPort™ CP1 (pin 6) not connected to RS232 transceiver. Use this if CP1 is set
up as a IN1, OUT1, or LED1.
OFF XPort™ CP2 (pin 7) is connected to the RS232 transceiver, which connects to
DCD of an attached DTE device through DB9 pin 1. Use this if CP2 is set up
for hardware handshaking.
3
ON CP2 (pin 7) is not connected to the transceiver. Use this if CP2 is set up as a
IN2 or OUT2.
OFF Use this when XPort™ CP3 (pin 8) is set up for hardware handshaking. With
SW1-5 configured appropriately, XPort™ CP3 will be connected to DTR of an
attached DTE device.
4
ON Use this when XPort™ CP3 (pin 8) is set up for hardware flow control. With
SW1-5 configured appropriately, XPort™ CP3 will be connected to RTS of an
attached DTE device.
OFF XPort™ CP3 (pin 8) is connected to the RS232 transceiver, which connects to
either DTR (DB9 pin 4) or RTS (DB9 pin 7) of an attached DTE device,
depending on the setting on SW1-4. Use this if CP3 is set up for hardware flow
control or handshake.
5
ON CP3 (pin 8) is not connected to the transceiver. Use this if CP3 is set up as a
IN3, OUT3, or LED3.
2-4
XPort™
User Manual and Development Kit
