Texas Instruments CDT370, User Manual

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Serial RS-232 Connection
2-7 Getting Started
2.5 Serial RS-232 Connection
This section discusses connecting the debugger’s host machine to the
CDT370 board with a serial RS-232 communication link.
In addition to what is supplied with the CDT370 board, you must supply a 5-volt
regulated power supply (Icdt max = 1.8 A. Standard 5-V, 3-A power supply rec-
ommended) and an RS-232 serial cable type DB-9.
Do not connect the system to a power source at this time. Wait until
all installation checks are complete.
Check to make sure that there are no metal objects beneath the
CDT370 board that might short the V
cc
, ground, or other signals.
Step 1: The CONF jumper must be set to the position RS232.
When the CONF jumper is set to RS232, the com PORT area’s jump-
er is not relevant, and any position is allowed.
Step 2: Connect the external regulated power supply to the CDT370 board
through the dedicated connector. Make sure that the polarity is set
correctly.
Step 3: Connect the RS-232 cable of the host to the DB-9 pin connector of
the CDT370 according to the cable description (Table 2–2).
Step 4: If you want to perform in-circuit emulation or device programming
with the CDT370, install the target cable dedicated to the TMS370
family member you are working with.
For target cable connections, refer to Chapter 8,
Target Connectors.
Step 5: Turn the CDT370 board on before you turn on the application hard-
ware.