1.4.1 Block Diagram

[Figure 12: Block Diagram — image not included]

Table 15: TC39xED Components

Component	Definition
AGBT	Aurora GigaBit Trace module on EEC
BBB	Back Bone Bus with FPI protocol
BOB	Bus Observation Block. Trace and trigger logic within MCDS
Cerberus	Central debug and tool access control unit is part of OCDS
DAP	Device Access Port. Fast and robust 2/3 pin tool interface (15/30 MB/s).
DAPE	Independent DAP instance for connecting a second tool to the ED
DMA	Direct Memory Access controller. Shares SRI/SPB bus interfaces with Cerberus.
ED	Emulation Device for calibration, measurement and debug
EEC	Emulation Extension Chip part
EMEM	Extension Memory (calibration and trace memory)
FPI	Flexible Peripheral Interconnect, the protocol of SPB and BBB buses
IOC32P/E	IO Client for accessing BBB by DAP/DAPE
MCDS	Multi-Core Debug Solution
OCDS	On-Chip Debug Support
OTGB	OCDS Trigger Bus: collects interrupt and peripheral trace and trigger signals.
POB	Processor Observation Block
SBCU	SPB Bus Control Unit
SoC	System on Chip (used also for “product chip part”)
SPB	System Peripheral Bus with FPI protocol
SRI	Shared Resource Interconnect cross bar
TMUX	Trace Multiplexer

The Extension Memory (EMEM) as part of the EEC is used for two conceptually different purposes: trace buffering and overlay memory.

Trace buffering is a non-intrusive tool to aid the debugging process. Matching elements from the MCDS module are provided to translate captured signals into trace messages. These messages are buffered in EMEM and can then be read by the tool.

Overlay memory allows RAM partitions to be mapped into the address ranges of the CPUs, optionally replacing parts of the TC3xx’s local Flash.