Техническая Спецификация для Atmel Evaluation Kit for AT32uC3A0512, 32-Bit AVR Microcontroller Atmel ATEVK1105 ATEVK1105

Модели

ATEVK1105

738

AT32UC3A

Debug tools utilizing the AUX port should connect to the device through a Nexus-compliant Mic-

tor-38 connector, as described in the AVR32UC Technical Reference manual. This connector

includes the JTAG signals and the RESET_N pin, giving full access to the programming and

debug features in the device.

Figure 35-3.

AUX+JTAG based debugger

35.4.3.1

Trace operation

Trace features are enabled by writing OCD registers by JTAG. The OCD extracts the trace infor-

mation from the CPU, compresses this information and formats it into variable-length messages

according to the Nexus standard. The messages are buffered in a 16-frame transmit queue, and

are output on the AUX port one frame at a time.

Table 35-1.

Auxiliary port signals

Signal

Direction

Description

MCKO

Output

Trace data output clock

MDO[5:0]

Output

Trace data output

MSEO[1:0]

Output

Trace frame control

EVTI_N

Input

Event In

EVTO_N

Output

Event Out

A V R 3 2

A U X + J T A G

d e b u g t o o l

J T A G

A U X

h ig h s p e e d

M ic t o r 3 8

T r a c e b u f f e r

P C

32058K

AVR32-01/12