Motorola 56F8323 - Parallel JTAG Interface Connector; Block Diagram of the Parallel JTAG Interface; Parallel JTAG Interface Connector Description

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 Figure 2-4. Using this connector, the
user can download programs and work with the 56F8323’s registers. Table 2-7 shows the
pin-out for this connector. When using the parallel JTAG interface, the jumper at JG3
should be removed, as shown in Table 2-6. A jumper at JG14 selects the Parallel Printer
Port’s interface voltage between +3.3V and +5.0V; see Table 2-8.
Figure 2-4. Block Diagram of the Parallel JTAG Interface
Table 2-7. Parallel JTAG Interface Connector Description
P1
Pin # Signal Pin # Signal
1NC14NC
2 PORT_RESET 15 PORT_IDENT
3PORT_TMS16 N/C
4PORT_TCK17 N/C
5 PORT_TDI 18 GND
6PORT_
TRST 19 GND
7PORT_DE
20 GND
8PORT_IDENT21 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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cale Semiconductor,
I
Freescale Semiconductor, Inc.
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