Jtag Instructions; Tap Controller State Machine Flow - Motorola ColdFire MCF5281 User Manual

Functional Description
1 TEST-LOGIC-RESET
0
0 RUN-TEST/IDLE
Figure 31-3. TAP Controller State Machine Flow

31.5.3 JTAG Instructions

Table 31-5 describes public and private instructions.
Instruction
EXTEST
IDCODE
SAMPLE/PRELOAD
31-8
1
SELECT DR-SCAN
CAPTURE-DR
1
SHIFT-DR
EXIT1-DR
PAUSE-DR
EXIT2-DR
0
UPDATE-DR
1
Table 31-5. JTAG Instructions
IR[3:0]
0000 Selects boundary scan register while applying fixed values to output pins and asserting
functional reset
0001 Selects IDCODE register for shift
0010 Selects boundary scan register for shifting, sampling, and preloading without
disturbing functional operation
MCF5282 User's Manual
1
0
0
0
1
1
1
0
0
1
1
0
Instruction Summary
SELECT IR-SCAN
0
CAPTURE-IR
1
0
SHIFT-IR
1
EXIT1-IR
0
PAUSE-IR
1
EXIT2-IR
0
1
UPDATE-IR
1 0
MOTOROLA
1
0
1
0