ATmega64 Atmel Corporation, ATmega64 Datasheet - Page 27

• Manufacturer Part Number: ATmega64
• Manufacturer: Atmel Corporation

Specifications of ATmega64

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• 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: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

External Memory
Interface
Overview
2490Q–AVR–06/10
With all the features that 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
on page
shown in
Figure 11. External Memory with Sector Select
Note:
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).
External Memory
(0-60K x 8)
1. ATmega64 in non ATmega103 compatibility mode: Memory Configuration A is available (Mem-
73,
Figure
ory Configuration B N/A).
ATmega64 in mega103 compatibility mode: Memory Configuration B is available (Memory
Configuration A N/A).
Table 33 on page
11.
Memory Configuration A
Internal Memory
Lower Sector
Upper Sector
SRW01
SRW00
SRW11
SRW10
77, and
0x0000
0x10FF
0x1100
0xFFFF
SRL[2..0]
Table 45 on page
(1)
External Memory
(0-60K x 8)
85). The memory configuration is
Memory Configuration B
Figure 1 on page
Internal Memory
ATmega64(L)
SRW10
0x0000
0x0FFF
0x1000
2,
0xFFFF
Table 27
27