Motorola 56F827, Hardware User Manual, Page: 24 / 56

2-8 56F827 Evaluation Module Hardware User’s Manual MOTOROLA
2.8.1 JTAG Connector
The JTAG connector on the 56F827EVM allows the connection of an external Host
Target Interface for downloading programs and working with the 56F827’s registers. This
connector is used to communicate with an external Host Target Interface which passes
information and data back and forth with a host processor running a debugger program.
Table 2-4
shows the pin-out for this connector.
When this connector is used with an external Host Target Interface, the parallel JTAG
interface should be disabled by placing a jumper in jumper block JG1. See
Table 2-5
for
this jumper’s selection options.
Table 2-4. JTAG Connector Description
J3
Pin # Signal Pin # Signal
1 TDI 2 GND
3 TDO 4 GND
5 TCK 6 GND
7 NC 8 KEY
9 RESET 10 TMS
11 +3.3V 12 NC
13 NC 14 TRST
Table 2-5. Parallel JTAG Interface Disable Jumper Selection
JG1 Comment
No jumpers On-board Parallel JTAG Interface Enabled
1–2 Disable on-board Parallel JTAG Interface
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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