ATmega8515 Atmel Corporation, ATmega8515 Datasheet - Page 195
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ATmega8515
Manufacturer Part Number
ATmega8515
Description
Manufacturer
Atmel Corporation
Specifications of ATmega8515
Flash (kbytes)
8 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
35
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
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
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
3
Input Capture Channels
1
Pwm Channels
3
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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Data Polling EEPROM
2512K–AVR–01/10
When a new byte has been written and is being programmed into EEPROM, reading the
address location being programmed will give the value $FF. At the time the device is
ready for a new byte, the programmed value will read correctly. This is used to deter-
mine when the next byte can be written. This will not work for the value $FF, but the user
should have the following in mind: As a chip erased device contains $FF in all locations,
programming of addresses that are meant to contain $FF, can be skipped. This does
not apply if the EEPROM is reprogrammed without chip-erasing the device. In this case,
data polling cannot be used for the value $FF, and the user will have to wait at least
t
Table 93. Minimum Wait Delay Before Writing the Next Flash or EEPROM Location
Figure 85. Serial Programming Waveforms
WD_EEPROM
Symbol
t
t
t
t
SERIAL DATA OUTPUT
WD_FUSE
WD_FLASH
WD_EEPROM
WD_ERASE
SERIAL CLOCK INPUT
SERIAL DATA INPUT
before programming the next byte. See Table 93 for t
SAMPLE
(MOSI)
(MISO)
(SCK)
MSB
MSB
Minimum Wait Delay
4.5 ms
4.5 ms
9.0 ms
9.0 ms
ATmega8515(L)
WD_EEPROM
value.
LSB
LSB
195