mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 670
mcf5282
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mcf5282
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Freescale Semiconductor, Inc
Datasheet
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IEEE 1149.1 Test Access Port (JTAG)
31.5.2
The TAP controller is a state machine that changes state based on the sequence of logical values on the
TMS pin.
TMS signal sampled on the rising edge of the TCLK signal.
Asserting the TRST signal asynchronously resets the TAP controller to the test-logic-reset state. As
Figure 31-3
causes the state machine to enter the test-logic-reset state, whatever the initial state.
31.5.3
Table 31-5
31-6
1
0
TEST-LOGIC-RESET
Figure 31-3
RUN-TEST/IDLE
TAP Controller
JTAG Instructions
describes public and private instructions.
shows, holding TMS at logic 1 while clocking TCLK through at least five rising edges also
0
shows the machine’s states. The value shown next to each state is the value of the
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
1
Figure 31-3. TAP Controller State Machine Flow
1
0
SELECT DR-SCAN
CAPTURE-DR
UPDATE-DR
PAUSE-DR
SHIFT-DR
EXIT1-DR
EXIT2-DR
1
0
0
0
1
1
1
1
0
1
1
0
0
1
0
SELECT IR-SCAN
CAPTURE-IR
UPDATE-IR
PAUSE-IR
SHIFT-IR
EXIT1-IR
EXIT2-IR
1
Freescale Semiconductor
0
0
1
0
1
1
0
1
1
0
0
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