AT91SAM9261S_1 Datasheet, PDF (296/709 Pages) ATMEL Corporation – AT91 ARM Thumb-based Microcontrollers

28.2 Block Diagram
Figure 28-1. 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 28-1.
Pin Name
DRXD
DTXD
Debug Unit Pin Description
Description
Debug Receive Data
Debug Transmit Data
Figure 28-2. Debug Unit Application Example
Boot Program
Type
Input
Output
Debug Monitor
Trace Manager
Debug Unit
Programming Tool
RS232 Drivers
Debug Console
Trace Console
296 AT91SAM9261S
6242E–ATARM–11-Sep09