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Debug Support
MOTOROLA
Technical Summary
2-9
2.5.2 Parallel JTAG Interface Connector
The Parallel JTAG Interface Connector, P1, allows the 56F8323 to communicate with a
Parallel Printer Port on a Windows PC; reference
. Using this connector, the
user can download programs and work with the 56F8323’s registers.
pin-out for this connector. When using the parallel JTAG interface, the jumper at JG3
should be removed, as shown in
. A jumper at JG14 selects the Parallel Printer
Port’s interface voltage b3.3V and +5.0V; see
Figure 2-4. Block Diagram of the Parallel JTAG Interface
Table 2-7. Parallel JTAG Interface Connector Description
P1
Pin #
Signal
Pin #
Signal
1
NC
14
NC
2
PORT_RESET
15
PORT_IDENT
3
PORT_TMS
16
N/C
4
PORT_TCK
17
N/C
5
PORT_TDI
18
GND
6
PORT_TRST
19
GND
7
PORT_DE
20
GND
8
PORT_IDENT
21
GND
DB-25 Connector
Parallel JTAG Interface
56F8323
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
JG3
1
2
+3.3V
Jumper Removed:
Enable JTAG I/F
Jumper Pin 1-2:
Disable JTAG I/F
P_DE
OUT
IN
DE
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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