ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 137

• Manufacturer Part Number: ATMEGA8HVD-4MX
• Description: MCU AVR 8K FLASH 2.1-8V 4MHZ QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8HVD-4MX

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 2.4 V
• Data Converters: A/D 1x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 18-MLF® Exposed Pad (Staggered Leads), DFN
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -

24.8.3
24.8.4
8052B–AVR–09/08
Chip Erase
Programming the Flash
The Chip Erase will erase the Flash and EEPROM
are 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 re-
programmed.
Note:
1. Load command “Chip Erase” (see
2. Wait after Instr. 3 until SDO goes high for the “Chip Erase” cycle to finish.
3. Load Command “No Operation”.
The Flash is organized in pages, see
the program data is latched into a page buffer. This allows one page of program data to be
programmed simultaneously. The following procedure describes how to program the entire
Flash memory:
1. Load Command “Write Flash” (see
2. Load Flash Page Buffer.
3. Load Flash High Address and Program Page. Wait after Instr. 3 until SDO goes high
4. Repeat 2 through 3 until the entire Flash is programmed or until all data has been
5. End Page Programming by Loading Command “No Operation”.
When writing or reading serial data to the ATmega4HVD/8HVD, data is clocked on the rising
edge of the serial clock, see
Figure 24-3. Addressing the Flash which is Organized in Pages
for the “Page Programming” cycle to finish.
programmed.
1. The EEPROM memory is preserved during Chip Erase if the EESAVE Fuse is programmed.
PROGRAM MEMORY
PROGRAM
COUNTER
PAGE
PAGE ADDRESS
WITHIN THE FLASH
PCMSB
Figure
PCPAGE
24-4,
Table 24-10 on page
Table
Table
PAGEMSB
Figure 26-3
PCWORD
24-14).
24-14).
WORD ADDRESS
WITHIN A PAGE
(1)
and
memories plus Lock bits. The Lock bits
INSTRUCTION WORD
ATmega4HVD/8HVD
Table 26-9
133. When programming the Flash,
PAGE
for details.
PCWORD[PAGEMSB:0]:
00
01
02
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