ATMEGA8515L-8AU Atmel, ATMEGA8515L-8AU Datasheet - Page 190

• Manufacturer Part Number: ATMEGA8515L-8AU
• Description: IC AVR MCU 8K 8MHZ 3V 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8515L-8AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI, USART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Minimum Operating Temperature: - 40 C
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Reading the Signature Bytes
Reading the Calibration Byte
Parallel Programming
Characteristics
190
ATmega8515(L)
Figure 80. Mapping Between BS1, BS2, and the Fuse- and Lock bits During Read
The algorithm for reading the Signature bytes is as follows (refer to “Programming the
Flash” on page 185 for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte ($00 - $02).
3. Set OE to “0”, and BS1 to “0”. The selected Signature byte can now be read at
4. Set OE to “1”.
The algorithm for reading the Calibration byte is as follows (refer to “Programming the
Flash” on page 185 for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte, $00.
3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.
4. Set OE to “1”.
Figure 81. Parallel Programming Timing, Including some General Timing
Requirements
(DATA, XA0/1, BS1, BS2)
DATA.
Fuse High Byte
Lock Bits
Data & Contol
RDY/BSY
PAGEL
XTAL1
WR
BS2
t
t
BVPH
DVXH
Fuse Low Byte
t
t
XHXL
PHPL
0
1
t
t
t
t
XLDX
PLBX
XLWL
PLWL
t
BVWL
t
WLWH
BS1
WLRL
0
1
t
WLBX
2512K–AVR–01/10
DATA
t
WLRH