參數(shù)資料
型號: M306V5EESP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PDIP64
封裝: 0.750 INCH, PLASTIC, SDIP-64
文件頁數(shù): 15/152頁
文件大?。?/td> 1963K
代理商: M306V5EESP
139
ATtiny25/45/85 [DATASHEET]
2586Q–AVR–08/2013
18. debugWIRE On-chip Debug System
18.1
Features
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
18.2
Overview
The debugWIRE On-chip debug system uses a One-wire, bi-directional interface to control the program flow, exe-
cute AVR instructions in the CPU and to program the different non-volatile memories.
18.3
Physical Interface
When the debugWIRE Enable (DWEN) Fuse is programmed and Lock bits are unprogrammed, the debugWIRE
system within the target device is activated. The RESET port pin is configured as a wire-AND (open-drain) bi-direc-
tional I/O pin with pull-up enabled and becomes the communication gateway between target and emulator.
Figure 18-1 shows the schematic of a target MCU, with debugWIRE enabled, and the emulator connector. The
system clock is not affected by debugWIRE and will always be the clock source selected by the CKSEL Fuses.
Figure 18-1. The debugWIRE Setup
dW
GND
dW(RESET)
VCC
1.8 - 5.5V
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