Intel 386

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
A-10
The following input pins have permanent weak pull-up resistors: TCK, TDI, TMS, TRST#,
SMI#, PEREQ/TMRCLK2, and FLT#.
STXCLK I/O WH Q X or Q
(1)
Q
TDO O Z or Q
(2)
Z or Q
(2)
Z or Q
(2)
Z or Q
(2)
TMROUT2 O WH Q X or Q
(1)
Q
TMROUT1:0 O WL Q X or Q
(1)
Q
TXD1 O 1 Q X or Q
(1)
Q
TXD0 O WL Q X or Q
(1)
Q
UCS# O 0 Q X 1
WDTOUT O 0 Q X Q
W/R# O 0 1 1 Z
WR# O1111
Table A-4. Pin States After Reset and During Idle, Powerdown, and Hold (Sheet 2 of 2)
NOTES:
1. X if clock source is internal; Q if clock source is external.
2. Q when shifting data out through the JTAG port, otherwise Z.