DSP56309UM Datasheet, PDF (300/424 Pages) Motorola, Inc – 24-Bit Digital Signal Processor

Freescale Semiconductor, Inc.
On-Chip Emulation Module
JTAG PORT/onCE MODULE INTERACTION
Table 10-14 TMS Sequencing for Reading Pipeline Registers (Continued)
Step TMS
JTAG Port
OnCE Module
Note
n
0
Shift-DR
Idle
..................................................................
n
0
Shift-DR
Idle
The eight bits of the OnCE
command ÒRead PDBÓ
(10001010) are shifted in.
o
1
Exit1-DR
Idle
Ñ
p
1
Update-DR
Execute ÒRead PDBÓ
PDB value is loaded in
shifter.
q
1
Select-DR-Scan
Idle
Ñ
r
0
Capture-DR
Idle
Ñ
s
0
Shift-DR
Idle
..................................................................
The 24 bits of the PDB are
shifted out (24 steps).
s
0
Shift-DR
Idle
t
1
Exit1-DR
Idle
Ñ
u
1
Update-DR
Idle
Ñ
v
0
Run-Test/Idle
Idle
................................................
v
0
Run-Test/Idle
Idle
This step can be repeated,
enabling an external
command controller to
analyze the information.
During Òstep vÓ the external command controller stores the pipeline information.
Afterwards, it can proceed with the debug activities as requested by the user.
10-32
DSP56309UM/D
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