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ATXMEGA64A1 Scheda tecnica(PDF) 48 Page - ATMEL Corporation

Il numero della parte ATXMEGA64A1
Spiegazioni elettronici  8/16-bit XMEGA A1 Microcontroller
PDF  99 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATXMEGA64A1 Scheda tecnica(HTML) 48 Page - ATMEL Corporation

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48
8067I–AVR–04/09
XMEGA A1
28. PDI - Program and Debug Interface
28.1
Features
• PDI - Program and Debug Interface (Atmel proprietary 2-pin interface)
• JTAG Interface (IEEE std. 1149.1 compliant)
• Boundary-scan capabilities according to the IEEE Std. 1149.1 (JTAG)
• Access to the OCD system
• Programming of Flash, EEPROM, Fuses and Lock Bits
28.2
Overview
The programming and debug facilities are accessed through the JTAG and PDI physical inter-
faces. The PDI physical interface uses one dedicated pin together with the Reset pin, and no
general purpose pins are used. JTAG uses four general purpose pins on PORTB.
The PDI is an Atmel proprietary protocol for communication between the microcontroller and
Atmel’s or third party development tools.
28.3
JTAG interface
The JTAG physical layer handles the basic low-level serial communication over four I/O lines
named TMS, TCK, TDI, and TDO. It complies to the IEEE Std. 1149.1 for test access port and
boundary scan.



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