Figure 10-10 Once Trace Buffer; 10.10 Serial Protocol Description - Motorola DSP56309 User Manual

On-Chip Emulation Module
Serial Protocol Description
TDI

10.10 SERIAL PROTOCOL DESCRIPTION

To permit an efficient means of communication between the external command
controller and the DSP56300 core chip, the following protocol is adopted. Before starting
any debugging activity, the external command controller has to wait for an acknowledge
10-22
PAB
Fetch Address (OPABFR)
Decode Address (OPABDR)
Execute Address (OPABEX)
Trace Buffer Register 0
Trace Buffer Register 1
Trace Buffer Register 2
Trace Buffer Register 11
Trace Buffer Shift Register

Figure 10-10 OnCE Trace Buffer

DSP56309UM/D
Circular
Buffer
Pointer
TCK
TDO
AA0710
MOTOROLA