I/O select (Sec. 3.3.7)

RESET\ (Sec. 3.3.1)

disable\

Data

input Latch

(Sec. 3.3.8)

Clock input

D/O latch CKT

disable

Data

Buffer input

(Sec. 3.3.8)

Clock input

D/I buffer CKT

D/I/O

When the RESET\ is in Low-state Æ all D/I/O operations are disabled

When the RESET\ is in High-state Æ all D/I/O operation are enabled.

If D/I/O is configured as D/I port Æ D/I= external input signal

If D/I/O is configured as D/O port Æ D/I = read back of D/O

If D/I/O is configured as D/I port Æ send to D/O will change the D/O latch register only. The D/I & external input signals will not change.

OME-PIO-D56/PIO-D24 User Manual (Ver.2.1, Oct/2003, PPH-005-21)

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Omega Vehicle Security OME-PIO-D56 manual Select Sec RESET\ Sec