dsp56800 Freescale Semiconductor, Inc, dsp56800 Datasheet - Page 228

• Manufacturer Part Number: dsp56800
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

JTAG and On-Chip Emulation (OnCE™)
Together, these sub-modules provide a full-featured emulation and debug environment. Communication
with the OnCE port module is handled via the JTAG port and thus may be considered the primary
communications sub-module for the OnCE port, although it operates independently. The operations of the
OnCE port occur independently of the main DSP56800 core logic, and require no core resources.
9-6
TDI / TDO
PAB Execute Register
PAB Decode Register
XAB1
Breakpoint Register
PAB Fetch Register
PAB
Control Register
PGDB Register
PDB Register
Figure 9-3. OnCE Block Diagram
Command
Address
Decoder
Cmd. Reg.
FIFO
OnCE
DSP56800 Family Manual
Stat. Reg
MUX
X:$FFFF
Breakpoint
and Trace
and Control
Count Reg.
Machine
PDB
PGDB
PAB
OnCE
State
Logic
OnCE Command,
Status, and Control
Breakpoint
and
Trace
Pipeline
Registers
FIFO
History
Buffer
Freescale Semiconductor
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