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HighWire HW400c/2 User Reference Guide Rev 1.0
3.1.2 Console port
The front panel console port is connected through the MV64462 via a Linear Systems
LTC1386 EIA-562 (low voltage EIA-232) transceiver. The console port is an RJ45
modular connector mounted on the front panel using three wire (Tx, Rx, GND) EIA-
232 at 9600 baud, 8N1 (8 bits, No parity, 1 stop bit). Figure 4 shows the console port
pin out.
Pin 1
1
2
3
4
5
6
7
8
n/c
n/c
Tx
Rx
Shield
CONSOLE
Figure 4. Console port pin out
3.1.3 Pushbutton Reset / Interrupt
An optional external pushbutton reset is provided as a 6-pin header (part of J8, J9, see
Figure 2, Figure 5, and Table 7) on the board that accepts the standard SBE
developer’s debug cable with toggle switch. Contact SBE Technical Support for
additional details on obtaining a developer’s debug cable.
The same toggle switch is also used to generate a non-maskable interrupt (NMI), by
pushing it in the opposite direction. The pushbutton interrupt signal is connected to a
GPIO port of the Marvell Discovery III System Controller, which can be configured
to route it to the MPC744X if desired. See Table 11 for the GPIO port number.
Figure 5. J8, J9 Reset/NMI header
J9 J8
RST O O
This row (even numbered pins)
reserved for factory use
NMI
(
-
)
SDA SCL
Indicates location of Pin 1
I2C2 I2C2
October 10, 2006 Copyright 2006, SBE, Inc. Page 14