ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 213

• 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

30.7.3
30.7.4
8042D–AVR–10/11
Enter programming mode
Chip erase
Table 30-14. Pin values used to enter programming mode.
Table 30-15. XA1 and XA0 coding.
Table 30-16. Command byte bit coding.
The following algorithm puts the device in parallel programming mode:
1. Make sure the chip is started as explained in
2. Set RESET to “0” and toggle XTAL1 at least six times.
3. Set the Prog_enable pins listed in
4. Apply 11.5V - 12.5V to RESET. Any activity on Prog_enable pins within 100ns after +12V
5. Wait at least 50µs before sending a new command.
The Chip Erase will erase the Flash and EEPROM
not reset until the program memory has been completely erased. The Fuse bits are not
changed. A Chip Erase must be performed before the Flash and/or EEPROM are
reprogrammed.
Note:
XA1
Command byte
page
has been applied to RESET, will cause the device to fail entering programming mode.
0
0
1
1
1000 0000
0100 0000
0010 0000
0001 0000
0001 0001
0000 1000
0000 0100
0000 0010
0000 0011
1. The EEPRPOM memory is preserved during Chip Erase if the EESAVE Fuse is programmed.
PB3
PB2
PB1
PB0
Pin
43.
XA0
0
1
0
1
Action when XTAL1 is pulsed
Load flash or EEPROM address (High or low address byte determined by BS1)
Load data (High or Low data byte for Flash determined by BS1)
Load command
No action, idle
Command executed
Chip erase
Write fuse bits
Write lock bits
Write flash
Write EEPROM
Read signature bytes and calibration byte
Read fuse and lock bits
Read flash
Read EEPROM
Prog_enable[3]
Prog_enable[2]
Prog_enable[1]
Prog_enable[0]
Symbol
Table 30-14
”Power-on reset and charger connect” on
(1)
to “0000” and wait at least 100ns.
ATmega16HVB/32HVB
memories plus Lock bits. The Lock bits are
Value
0
0
0
0
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