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Appendix E: Performance Verification
A–30
VX4801 Programmable Digital I/O Module
ibwrt "i*"
ibrd 100
(Observe: response of 00FF00FF00FF)
d. Set the Slave to un-assert external tri-state signals. Then set the VX4801
for the odd bytes to be inputs, for the even bytes to be outputs with a
Load Output value of 00, and for internal tri-state to be inactive for all
bytes. Read all bytes and verify the 00 output value on all bytes (internal
tri-state inactive):
set slave
ibwrt "L0dFF"
ibwrt "i*"
set VX4801
ibwrt "r;m024ih135oh;L135d00;t*i"
ibwrt "i*"
ibrd 100
(Observe: response of 000000000000)
e. Set the Slave to assert the external tri-state signals to the odd bytes of the
VX4801 and verify a response of FF00FF00FF00:
set slave
ibwrt "L0d55"
ibwrt "i*"
set VX4801
ibwrt "i*"
ibrd 100
(Observe: response of FF00FF00FF00)