3 jtag instructions, Jtag instructions -7, Table 23-5/23-7 – Freescale Semiconductor MCF5480 User Manual

Page 715: Tms pin, Figure 23-3, Shows, holding tms at logic 1 while clocki

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Functional Description

MCF548x Reference Manual, Rev. 3

Freescale Semiconductor

23-7

Figure 23-3. TAP Controller State Machine Flow

23.4.3

JTAG Instructions

Table 23-5

describes public and private instructions.

F

Table 23-5. JTAG Instructions

Instructio

n

IR[5:0]

Instruction Summary

EXTEST

000000

Selects boundary scan register while applying fixed values to output
pins and asserting functional reset

SAMPLE

000001

Selects boundary scan register for shifting, sampling, and preloading
without disturbing functional operation

IDCODE

011101

Selects IDCODE register for shift

RUN-TEST/IDLE

TEST-LOGIC-RESET

1

1

SELECT DR-SCAN

CAPTURE-DR

EXIT1-DR

PAUSE-DR

UPDATE-DR

SELECT IR-SCAN

SHIFT-DR

EXIT2-DR

CAPTURE-IR

SHIFT-IR

EXIT1-IR

PAUSE-IR

EXIT2-IR

UPDATE-IR

0

0

1

1

0

0

0

1

1

1

0

0

0

1

1

0

0

1

1

0

1

0

1

1

0

1

1

0

0

1

0

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