Sundance SMT310 v.1.6 - Manual (Page 16)

User Manual (QCF42); Version 3.0, 8/11/00; © Sundance Multiprocessor Technology Ltd. 1999
8 ComPorts
The SMT310 gives access to all six TIM site ComPorts. One of four ComPorts can be
connected through a high drive buffer to a connector on the rear panel of the card.
This connection and switching is achieved using Quick Switch B, alleviating the need
for patch cables.
Two of the TIM site ComPorts are connected straight to 14-way surface-mount FMS
connectors for connection to other ComPort compatible devices within the same
chassis.
There is a connection from the PCI interface to ComPort 3 for booting the TIM. This
connection can be severed with Quick Switch C (clear
CENc ) allowing ComPort 3 to
be used for other purposes. This also allows the PCI interface ComPort to be used
independently of the TIM as it is also wired to a 14-way surface-mount FMS
connector.
Buffer
PCI Bridge
PCI Connector
Comm-
port
CPLD
Module Site
Buffered
Comm Port
Comm-ports
Global Bus
1 4 0 2 3 5
FMS FMS
FMS FMS
Quick
Switch B
Quick
Switch C
J4
J2 J3
J1
Figure 1: ComPort connection diagram
The configuration of the ComPorts on the SMT310 can be set using the ComPort
configuration register (I/O Offset 0x20).
Default state = 0x2C (Assuming no FMS cables connected)
D7 D6 D5 D4 D3 D2 D1 D0
X X CENc CENb SELC
1
SELB
2
SEL1 SEL0
Read/Write Read/Write Read-only Read-only Read/Write Read/Write