5.1.2
J1 Description:
CLOCKA: 20.2752M Hz for I-7188XC
CLOCKA: 40M Hz for I-7188XA, I-7188XB, I-7188XG, I-7188EX,
I-7188EG
ARDY: let this pin OPEN for no wait states applications
INT0, INT1: let these two pins OPEN for no interrupt applications
TO_0, TO_1: can be used as CPU’s timer output or
programmable D/I/O
TI_0, TI_1: can be used as CPU’s timer input or programmable
D/I/O
DIO4, DIO9, DIO14: programmable D/I/O bit
SCLK: the 7188X/7188E series use this signal as a CLOCK
source to drive all on-board serial devices, so it is always be
programmed as D/O. Change this signal to other configuration
will cause serious errors. User can use this signal to drive
external serial devices without any side effects.
I/O Expansion Bus for 7188X/7188E User’s Manual, Jan/2005 v1.5, 7PH-000-15---22