DSP56858EVM User Manual, Rev. 3
2-10
Freescale Semiconductor
2.8.1 JTAG Connector
The JTAG connector on the 56858EVM allows the connection of an external Host Target
Interface for downloading programs and working with the 56858’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 2-5
shows the pin-out
for this connector.
Table 2-5. 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
DE
14
TRST
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 JG5. Reference
Table 2-6
for this
jumper’s selection options.
Table 2-6. Parallel JTAG Interface Disable Jumper Selection
JG5
Comment
No jumpers
On-board Parallel JTAG Interface Enabled
1–2
Disable on-board Parallel JTAG Interface
Summary of Contents for 56858
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