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ATmega1284P bảng dữ liệu(PDF) 18 Page - ATMEL Corporation

tên linh kiện ATmega1284P
Giải thích chi tiết về linh kiện  8-bit Microcontroller with 128K Bytes In-System Programmable Flash
PDF  380 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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ATmega1284P bảng dữ liệu(HTML) 18 Page - ATMEL Corporation

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18
8059D–AVR–11/09
ATmega1284P
The 32 general purpose working registers, 64 I/O registers, 160 Extended I/O Registers and the
16K bytes of internal data SRAM in the ATmega1284P are all accessible through all these
addressing modes. The Register File is described in ”General Purpose Register File” on page
10.
Figure 6-2.
Data Memory Map
6.3.1
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 6-3.
Figure 6-3.
On-chip Data SRAM Access Cycles
32 Registers
64 I/O Registers
Internal SRAM
(16K x 8)
$0000 - $001F
$0020 - $005F
$40FF
$0060 - $00FF
Data Memory
160 Ext I/O Reg.
$0100
clk
WR
RD
Data
Data
Address
Address valid
T1
T2
T3
Compute Address
CPU
Memory Access Instruction
Next Instruction



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