DOC E10523 Rev.D
Interactive Circuits And Systems Ltd. 2000
16
4.2.2 P4 Local Bus Interface
Switch block SW3 is used to connect parallel (pull-up/pull-down) resistive terminations to
the External Clock and Trigger signals, as shown in the following table. These are required
if the user chooses not to use serial terminating resistors at the signal transmitter/s. Other
functions of the P4 Local Bus can be programmed by software using the Control Register
(see section 5.7). When connecting external clock and/or trigger signals to a multiple board
FPDP configuration, it is recommended that the terminations should be enabled on the
master board only, and that the signals should be driven from the End Slave end of the
cable so that the terminations are at the far end of the cable.
SWITCH
FUNCTION (When switch in "ON" or Closed Position)
SW3-1
Terminate External Clock Input
SW3-2
Terminate External Trigger Input
Содержание ICS-130
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