Sundance SMT310 v.1.6 - Manual (Page 47)

Page 47 of 50 SMT310 User Manual V1.6
This cable has 13 individual pairs, with an overall shield, and an outer diameter of
7mm. Cable length should be as short as possible. The maximum tested cable length
is 1 meter.
On reset, each ComPort initialises to being either an input or an output.
Do not connect ‘Reset to Input’ ComPorts together.
Do not connect ‘Reset to Output’ ComPorts together.
However if this should occur, no damage will result, because ComPort direction
signals disable relevant ComPorts.
The following table shows connector pin-out and cable pair connections. This is
important, as the critical signals must be paired with a ground as shown. The
allocation to twisted pairs is based on grouping the data signals because they change
at the same time, so that crosstalk is not an issue. Each control signal has its own
ground:
Pin Twisted
Pair
RTI
Signal
RTO
Signal
Pin Twisted
Pair
RTI Signal RTO Signal
1 1 I/O_OUT I/O_IN 15 8 D2 D2
2 1 GND GND 16 8 D3 D3
3 2 I/O_IN I/O_OUT 17 9 D4 D4
4 2 GND GND 18 9 D5 D5
5 3 /CSTRB /CSTRB 19 10 D6 D6
6 3 GND GND 20 10 D7 D7
7 4 /CRDY /CRDY 21 11 VCC VCC
8 4 GND GND 22 11 GND GND
9 5 /CREQ /CREQ 23 12 /RST_OUT /RST_IN
10 5 GND GND 24 12 GND GND
11 6 /CACK /CACK 25 13 /RST_IN /RST_OUT
12 6 GND GND 26 13 GND GND
13 7 D0 D0 SHELL - SHIELD SHIELD
14 7 D1 D1
Table 21 : Buffered ComPort connector pin out
The overall shield is attached to the body of the metal plug shell.
The signal VCC is fused on the board at 1 amp; it automatically resets when the load
is removed.