Omega Vehicle Security OME-PIO-D56 - Manual (Page 10)

I/O select (Sec. 3.3.7)
disable\
input Latch
Clock input
D/O latch CKT
RESET\ (Sec. 3.3.1)
Data
(Sec. 3.3.8)
D/I/O
disable
Buffer input
Clock input
D/I buffer CKT
Data
(Sec. 3.3.8)
• 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) ---- 8