參數(shù)資料
型號(hào)： AT_8032
廠商： Atmel Corp.
英文描述： 8-bit Embedded Microcontroller Core(8位嵌入式基于工業(yè)標(biāo)準(zhǔn)軟件兼容的微控制器)
中文描述： 8位嵌入式微控制器核心（8位嵌入式基于工業(yè)標(biāo)準(zhǔn)軟件兼容的微控制器）
文件頁(yè)數(shù)： 3/39頁(yè)
文件大小： 532K
代理商： AT_8032
AT_8032 Core
3
Memory Organization
The AT_8032 has a Harvard architecture with separate
program and data memories (both 64K address spaces). In
addition, there is an internal 384-byte data memory which
can be accessed by 8-bit addresses. This enables data to
be stored and manipulated more quickly.
Program memory is read-only. In the ROM version, the
lowest 4K, 8K or 16K bytes of program memory are pro-
vided on-chip. In the ROMless versions all program
memory is external. The Program Store Enable (signal
PSEN) is the read strobe for external program memory.
Data memory is in a separate address space from program
memory. Up to 64K bytes of external RAM can be
addressed in the external data memory space. The
AT_8032 produces read (RD) and write (WR) signals as
required.
Combination of the external program memory and the
external data memory is possible. In this case, it is neces-
sary to apply the RD and PSEN signals to the inputs of an
AND gate, and to use the output of the gate as the read
strobe to the external program/data memory.
Figure 3.
Program Memory
0000
FFFF
64K Bytes
PSEN
Direct and Indirect
Addressing
External
Program Memory
Internal
Data Memory
Indirect Addressing
Only
80H
7FH
00H
FFH
Special Function Register
Direct Addressing
Only
128 bytes
128 bytes
80H
FFH
128 bytes
Read Only
Memory
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