Motorola DSP56309 User Manual page 301

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