ATMEGA640V-8CU Atmel, ATMEGA640V-8CU Datasheet - Page 33
![IC MCU AVR 64K FLASH 100-CBGA](/photos/6/89/68968/313-100-cbga_sml.jpg)
ATMEGA640V-8CU
Manufacturer Part Number
ATMEGA640V-8CU
Description
IC MCU AVR 64K FLASH 100-CBGA
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA640V-8CU
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
86
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TFBGA
Processor Series
ATMEGA64x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
8 KB
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
86
Number Of Timers
6
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 16 Channel
For Use With
ATSTK600-TQFP100 - STK600 SOCKET/ADAPTER 100-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK503 - STARTER KIT AVR EXP MODULE 100P
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8.1.6
2549M–AVR–09/10
Using all 64 Kbytes Locations of External Memory
the Application software, the external 32 Kbytes memory will appear as one linear 32 Kbytes
address space from 0x2200 to 0xA1FF. This is illustrated in
Figure 8-7.
Since the External Memory is mapped after the Internal Memory as shown in
28, only 56 Kbytes of External Memory is available by default (address space 0x0000 to 0x21FF
is reserved for internal memory). However, it is possible to take advantage of the entire External
Memory by masking the higher address bits to zero. This can be done by using the XMMn bits
and control by software the most significant bits of the address. By setting Port C to output 0x00,
and releasing the most significant bits for normal Port Pin operation, the Memory Interface will
address 0x0000 - 0x2FFF. See the following code examples.
Care must be exercised using this option as most of the memory is masked away.
Address Map with 32 Kbytes External Memory
0x0000
0x21FF
0x2200
0x7FFF
0x8000
0x90FF
0x9100
AVR Memory Map
Internal Memory
ATmega640/1280/1281/2560/2561
External
Memory
External 32K SRAM
Figure
8-7.
0x7FFF
0x0000
Figure 8-1 on page
33
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