ATmega8515 Atmel Corporation, ATmega8515 Datasheet - Page 25

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ATmega8515

Manufacturer Part Number
ATmega8515
Description
Manufacturer
Atmel Corporation
Datasheets

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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External Memory
Interface
Overview
Using the External Memory
Interface
2512K–AVR–01/10
With all the features the External Memory Interface provides, it is well suited to operate
as an interface to memory devices such as external SRAM and Flash, and peripherals
such as LCD-display, A/D, and D/A. The main features are:
When the eXternal MEMory (XMEM) is enabled, address space outside the internal
SRAM becomes available using the dedicated external memory pins (see Figure 1 on
page 2, Table 26 on page 66, Table 32 on page 70, and Table 38 on page 74). The
memory configuration is shown in Figure 11.
Figure 11. External Memory with Sector Select
The interface consists of:
Four Different Wait State Settings (Including No wait State)
Independent Wait State Setting for Different External Memory Sectors (Configurable
Sector Size)
The Number of Bits Dedicated to Address High Byte is Selectable
Bus Keepers on Data Lines to Minimize Current Consumption (Optional)
AD7:0: Multiplexed low-order address bus and data bus
A15:8: High-order address bus (configurable number of bits)
ALE: Address latch enable
RD: Read strobe
WR: Write strobe
External Memory
(0-64K x 8)
Internal Memory
Lower Sector
Upper Sector
SRW01
SRW00
SRW11
SRW10
ATmega8515(L)
0x0000
0x25F
0x260
0xFFFF
SRL[2..0]
25

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