ATMEGA8A-AUR Atmel, ATMEGA8A-AUR Datasheet - Page 229

• Manufacturer Part Number: ATMEGA8A-AUR
• Description: MCU AVR 8KB FLASH 16MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8A-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24.5
24.6
24.6.1
8159D–AVR–02/11
Page Size
Parallel Programming Parameters, Pin Mapping, and Commands
Signal Names
Table 24-5.
Table 24-6.
This section describes how to parallel program and verify Flash Program memory, EEPROM
Data memory, Memory Lock Bits, and Fuse Bits in the ATmega8A. Pulses are assumed to be at
least 250 ns unless otherwise noted.
In this section, some pins of the ATmega8A are referenced by signal names describing their
functionality during parallel programming, see
the following table are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse.
The bit coding is shown in
When pulsing WR or OE, the command loaded determines the action executed. The different
Commands are shown in
Figure 24-1. Parallel Programming
4K words (8K bytes)
EEPROM Size
512 bytes
Flash Size
No. of Words in a Page and no. of Pages in the Flash
No. of Words in a Page and no. of Pages in the EEPROM
Page Size
4 bytes
Table
Table
Page Size
RDY/BSY
32 words
PAGEL
+12 V
BS1
XA0
XA1
BS2
WR
OE
24-10.
24-9.
PCWORD
EEA[1:0]
PD1
PD2
PD3
PD4
PD5
PD6
RESET
XTAL1
GND
PD7
PCWORD
PC2
PC[4:0]
PC[1:0]:PB[5:0]
Figure 24-1
No. of Pages
AVCC
VCC
No. of Pages
128
and
128
+5V
+5V
Table
DATA
24-7. Pins not described in
PCPAGE
EEA[8:2]
PCPAGE
PC[11:5]
ATmega8A
EEAMSB
PCMSB
8
11
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