Datasheet

742
AT32UC3A
36.3 Block diagram
Figure 36-1. JTAG and Boundary Scan access
AVR32 device
JTAG data registers
TAP
Controller
TCK
TMS
TDO
Instruction Register
ID Register
By-
pass
Reset
Register
Service Access Bus
interface
Boundary Scan Chain
CPU
Memories and
peripherals
OCD Registers
Pins and analog blocks
Instruction Register
Scan enable
Data register
scan enable
JTAG TAP
Boundary scan enable
JTAG device
JTAG master
TCK
TDI
TDO
...
TDI
TMS
RAM
High Speed Bus
Memory Service
Unit
Service
Access
Bus
32058K
AVR32-01/12