Motorola 56F827, Hardware User Manual

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Debug Support
MOTOROLA Technical Summary 2-9
2.8.2 Parallel JTAG Interface Connector
The Parallel JTAG Interface Connector, P2, allows the 56F827 to communicate with a
Parallel Printer Port on a Windows PC; reference
Figure 2-6
. By using this connector, the
user can download programs and work with the 56F827’s registers.
Table 2-6
shows the
pin-out for this connector. When using the parallel JTAG interface, the jumper at JG1
should be removed, as shown in
Table 2-5
.
Figure 2-6. Block Diagram of the Parallel JTAG Interface
Table 2-6. 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
9 PORT_VCC 22 GND
DB-25 Connector
Parallel JTAG Interface
56F827
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
JG1
1
2
+3.3V
Jumper Removed:
Enable JTAG I/F
Jumper Pin 1-2:
Disable JTAG I/F
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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