Debug Support
Technical Summary
2-7
2.5.2 Parallel JTAG Interface Connector
The Parallel JTAG Interface Connector, P2, allows the DSP56F801 to communicate with
a Parallel Printer Port on a Windows PC; reference
. By using this connector,
the user can download programs and work with the DSP56F801’s registers.
shows the pin-out for this connector. When using the parallel JTAG interface, the jumper
at JG5 should be removed, as shown in
Figure 2-4. Block Diagram of the Parallel JTAG Interface
Table 2-4. Parallel JTAG Interface Connector Description
P2
Pin #
Signal
Pin #
Signal
1
NC
14
NC
2
PORT_RESET
15
PORT_IDENT
3
PORT_TMS
16
NC
4
PORT_TCK
17
NC
5
PORT_TDI
18
GND
6
PORT_TRST
19
GND
7
NC
20
GND
8
PORT_IDENT
21
GND
DB-25 Connector
Parallel JTAG Interface
DSP56F801
TDI
TDO
P_TRST
TMS
TCK
P_RESET
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
IN
EN
TDI
TDO
TRST
TMS
TCK
RESET
JG5
1
2
+3.3V
Jumper Removed:
Enable JTAG I/F
Jumper Pin 1-2:
Disable JTAG I/F
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