Motorola Command One User Manual download pdf (Page 12)

2-2 Suite56™ Parallel Port Command Converter User’s Manual Motorola

Command Converter Interface Connector

Note:

Figure 3-1 may not represent the exact JTAG/OnCE configuration needed for

every DSP due to possible differences in internal resistors on the pins. Please

see the Data Sheet for your DSP for information on internal resistors.

Since the target system will have a resident reset circuit, an AND gate-in-series is

recommended with the CC_RESET

signal. This will allow the target DSP to be reset with

a valid V

level from either the target-reset circuit or from the command converter. The

pull-down resistors are provided to prevent false signals from being propagated to the

JTAG/OnCE circuit when the test data input/debug serial input (TDI/DSI) and test data

clock/debug serial clock (TCK/DSCK) lines are active. The test data out/debug serial

output (TDO/DSO) pull-up is designed to deassert the Debug Acknowledge signal from

the OnCE circuit

Figure 2-2 is the connector coming from the Target Interface Module via a 14-pin ribbon

cable. When viewed with pin 8 (keyed) on the right side, this plug connector has all odd

numbers on the left side and all even numbers on the right side when viewed from the top.

Spacing between pins is one-tenth inch.

Figure 2-2. Target Interface Module’s 14-Pin JTAG/OnCE Connector

TDI/DSI

TDO/DSO

TCK/DSCK

No Connect

CC_RESET

KEY (No Connect)

GND

910

TOP VIEW

11 12

13 14

TARGET V

DEZ

TMS0 (For JTAG Devices)

TRST

(For JTAG Devices)

(For JTAG/OnCE Devices)

AA2038

No Connect

eescale S

emiconduct

, I

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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