ATmega8HVA Atmel Corporation, ATmega8HVA Datasheet - Page 159

• Manufacturer Part Number: ATmega8HVA
• Manufacturer: Atmel Corporation

Specifications of ATmega8HVA

• Flash (kbytes): 8 Kbytes
• Pin Count: 28
• Max. Operating Frequency: 4 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -20 to 85
• I/o Supply Class: 1.8 to 9.0
• Operating Voltage (vcc): 1.8 to 9.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

27.8.5
27.8.6
27.8.7
27.8.8
27.8.9
27.8.10
8024A–AVR–04/08
Programming the EEPROM
Reading the Flash
Reading the EEPROM
Programming and Reading the Fuse and Lock Bits
Reading the Signature Bytes and Calibration Byte
Power-off sequence
Figure 27-5. High-voltage Serial Programming Waveforms
The EEPROM is organized in pages, see
When programming the EEPROM, the data is latched into a page buffer. This allows one page
of data to be programmed simultaneously. The programming algorithm for the EEPROM Data
memory is as follows (refer to
1. Load Command “Write EEPROM”.
2. Load EEPROM Page Buffer.
3. Program EEPROM Page. Wait after Instr. 2 until SDO goes high for the “Page Program-
4. Repeat 2 through 3 until the entire EEPROM is programmed or until all data has been
5. End Page Programming by Loading Command “No Operation”.
The algorithm for reading the Flash memory is as follows (refer to
1. Load Command "Read Flash".
2. Read Flash Low and High Bytes. The contents at the selected address are available at
The algorithm for reading the EEPROM memory is as follows (refer to
160):
1. Load Command “Read EEPROM”.
2. Read EEPROM Byte. The contents at the selected address are available at serial output
The algorithms for programming and reading the Fuse Low/High bits and Lock bits are shown in
Table 27-14 on page
The algorithms for reading the Signature bytes and Calibration byte are shown in
page
Exit Programming mode by powering the device down, or by bringing RESET pin to 0V.
ming” cycle to finish.
programmed.
serial output SDO.
SDO.
SDO
SDI
SCI
SII
160.
0
MSB
MSB
MSB
160.
1
2
Table 27-14 on page
3
4
”High-voltage Serial Programming” on page
5
160):
6
ATmega8HVA/16HVA
7
LSB
LSB
LSB
8
Table 27-14 on page
9
Table 27-14 on page
10
Table 27-14 on
160):
173.
159