AT91SAM9G45PRE Datasheet, PDF (356/1218 Pages) ATMEL Corporation – DDR2 Controller 4-bank DDR2/LPDDR, SDRAM/LPSDR

27.3 Block Diagram
Figure 27-1. Debug Unit Functional Block Diagram
Peripheral
Bridge
Peripheral DMA Controller
APB
Power
Management
Controller
Debug Unit
MCK
Baud Rate
Generator
Transmit
Receive
ARM
Processor
nTRST
COMMRX
COMMTX
DCC
Handler
Power-on
Reset
ICE
Access
Handler
force_ntrst
Chip ID
Interrupt
Control
Parallel
Input/
Output
DTXD
DRXD
dbgu_irq
Table 27-1.
Pin Name
DRXD
DTXD
Debug Unit Pin Description
Description
Debug Receive Data
Debug Transmit Data
Figure 27-2. Debug Unit Application Example
Boot Program
Type
Input
Output
Debug Monitor
Trace Manager
Debug Unit
Programming Tool
RS232 Drivers
Debug Console
Trace Console
356 AT91SAM9G45
6438F–ATARM–21-Jun-10