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ATmega88 Datasheet(PDF) 17 Page - ATMEL Corporation

Part # ATmega88
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  340 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega88 Datasheet(HTML) 17 Page - ATMEL Corporation

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17
7530H–AVR–02/09
ATmega48/88/168 Automotive
Figure 5-3.
Data Memory Map
5.2.1
Data Memory Access Times
This section describes the general access timing concepts for internal memory access. The
internal data SRAM access is performed in two clk
CPU cycles as described in Figure 5-4.
Figure 5-4.
On-chip Data SRAM Access Cycles
5.3
EEPROM Data Memory
The ATmega48/88/168 contains 256/512/512 bytes of data EEPROM memory. It is organized
as a separate data space, in which single bytes can be read and written. The EEPROM has an
endurance of at least 100,000 write/erase cycles. The access between the EEPROM and the
CPU is described in the following, specifying the EEPROM Address Registers, the EEPROM
Data Register, and the EEPROM Control Register.
“Memory Programming” on page 278 contains a detailed description on EEPROM Programming
in SPI or Parallel Programming mode.
32 Registers
64 I/O Registers
Internal SRAM
(512/1024/1024 x 8)
0x0000 - 0x001F
0x0020 - 0x005F
0x02FF/0x04FF/0x04FF
0x0060 - 0x00FF
Data Memory
160 Ext I/O Reg.
0x0100
clk
WR
RD
Data
Data
Address
Address valid
T1
T2
T3
Compute Address
CPU
Memory Access Instruction
Next Instruction



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