Sundance SMT300Q v.1.6 - Manual (Page 22)

User Manual (QCF42); Version 3.0, 8/11/00; © Sundance Multiprocessor Technology Ltd. 1999
D31 D30 D29 D28 Buffered ComPort 8 Connection (Output Only)
0 X X X Buffered ComPort 8 Disabled
1 0 0 0 Buffered ComPort 8 Connected to TIM Site 1 ComPort 0
1 0 0 1 Buffered ComPort 8 Connected to TIM Site 4 ComPort 1
1 0 1 0 Buffered ComPort 8 Connected to TIM Site 4 ComPort 2
Table 13: Buffered ComPort 8 connections
The front panel mounted connector is a 26 pin 3M type, (3M part number 10226-
5212JL).
As well as the 12 C4x ComPort signals and signal grounds, there are 6 additional
signals. Note that these signals are NOT essential for communications:
Name Description
I/O_OUT Output high when port is outputting data, output low when
port is receiving data.
I/O_IN Input which prevents bus contention if connected to I/O_OUT
/RST_OUT Active low open collector copy of the board reset drive.
/RST_IN Active low board reset input, pulled up to 3.3V by 100 ohms.
VCC 1 AMP +5 Volt supply, with resetable 1 Amp fuse, to power a
remote buffer, if required.
SHIELD Overall cable shield, connected to plug shells and chassis.
Table 14 : Buffered ComPort Additional Signals
The /RST_OUT is intended to allow synchronised reset of a number of boards by
driving the /RST_IN input.
The SMT502-Buffer is the recommended cable assembly for the buffered Comport
and can be purchased separately.