ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 156
ATmega88PA Automotive
Manufacturer Part Number
ATmega88PA Automotive
Description
Manufacturer
Atmel Corporation
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19. debugWIRE On-chip Debug System
19.1
19.2
19.3
156
Features
Overview
Physical Interface
Atmel ATtiny24/44/84 [Preliminary]
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The debugWIRE On-chip debug system uses a One-wire, bi-directional interface to control the
program flow, execute AVR
memories.
When the debugWIRE Enable (DWEN) Fuse is programmed and Lock bits are unpro-
grammed, the debugWIRE system within the target device is activated. The RESET port pin is
configured as a wire-AND (open-drain) bi-directional I/O pin with pull-up enabled and becomes
the communication gateway between target and emulator.
Figure 19-1. The debugWIRE Setup
Figure 19-1 on page 156
and the emulator connector. The system clock is not affected by debugWIRE and will always
be the clock source selected by the CKSEL Fuses.
Complete Program Flow Control
Emulates All On-chip Functions, Both Digital and Analog, except RESET Pin
Real-time Operation
Symbolic Debugging Support (Both at C and Assembler Source Level, or for Other HLLs)
Unlimited Number of Program Break Points (Using Software Break Points)
Non-intrusive Operation
Electrical Characteristics Identical to Real Device
Automatic Configuration System
High-Speed Operation
Programming of Non-volatile Memories
dW
shows the schematic of a target MCU, with debugWIRE enabled,
®
instructions in the CPU and to program the different non-volatile
GND
dW(RESET)
VCC
1.8 - 5.5V
7701E–AVR–02/11
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