ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 186

• Manufacturer Part Number: ATmega16HVB
• Manufacturer: Atmel Corporation

Specifications of ATmega16HVB

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 17
• Ext Interrupts: 15
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

28. debugWIRE on-chip debug system
28.1
28.2
28.3
186
Features
Overview
Physical interface
ATmega16HVB/32HVB
•
•
•
•
•
•
•
•
•
•
The debugWIRE On-chip debug system uses a One-wire, bi-directional interface to control the
program flow, execute AVR instructions in the CPU and to program the different non-volatile
memories.
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-directional I/O pin with pull-up enabled and becomes the commu-
nication gateway between target and emulator.
Figure 28-1. The debugWIRE setup.
Figure 28-1
connector. The system clock is not affected by debugWIRE and will always be the clock source
selected by the OSCSEL Fuses.
Complete program flow control
Emulates all øn-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
shows the schematic of a target MCU, with debugWIRE enabled, and the emulator
dW
dW
GND
GND
dW(RESET)
dW(RESET)
VCC
VCC
3.0V - 4.5V
1.8 - 5.5V
8042D–AVR–10/11