Advertisement
Pe nt e k Mo del 4284 Oper ating Manual
2.12
The Model 4284 Front Panel
2.12.1
Comm Port Connectors
All twelve signal lines on the Comm Ports are equipped with a series 24τ
resistor to properly match the characteristic impedance of the flat ribbon
wiring used in the Comm Port cables.
Comm Port cables are available preassembled from Pentek as Model 2104.
Cable lengths of up to 18 in. can be accommodated.
At Power−up, Comm Ports 0, 1 and 2 are configured as outputs (i. e., to
write), and Ports 3, 4 and 5 are configured as inputs (i. e., to read). Changing
a Comm Port's I/O configuration is a simple matter of addressing it for the
opposite function. In other words, if you wish to use Port 3 as an output, all
you need to do is address it to write. If that port were connected to Port 0,
then when the data written by Port 3 arrives at Port 0, that port reconfigures
itself as an input. See Chapter 8 (Communication Ports) of the Texas Instru−
ments TMS320C4x User's Guide for further details.
2.12.2
XDS Emulator Connector
The Model 4284 has provisions for use
with the Texas Instruments XDS510
Emulator. The emulator connector is
available on the 4284's front panel. This
connector is keyed for proper alignment
with the socket connector at the end of
the emulator cable. Refer to Texas
Instruments TMS320C40 Emulator
User's Guide or the documentation sup−
plied with the XDS system for operating
details.
pinout of the emulator connector.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
(continued)
(continued)
Figure 2−4: Comm Port Cable
Figure
2−5, at the right, gives the
P age 31
Figure 2−5: XDS
Connector Pinout
Rev.: F.2
Advertisement
