參數(shù)資料
型號: PSD835G2-B-20M
廠商: 意法半導體
英文描述: Configurable Memory System on a Chip for 8-Bit Microcontrollers
中文描述: 在8片位微控制器可配置存儲系統(tǒng)
文件頁數(shù): 31/110頁
文件大?。?/td> 570K
代理商: PSD835G2-B-20M
PSD8XX Family
PSD835G2
30
The
PSD835G2
Functional
Blocks
(cont.)
MAIN
FLASH
DPLD
FLASH
BOOT
BLOCK
SRAM
RS0
CSBOOT0-3
FS0-7
CS
CS
CS
OE
OE
RD
PSEN
OE
Figure 7. 80C51 Memory Modes – Separate Space Mode
MAIN
FLASH
DPLD
FLASH
BOOT
BLOCK
SRAM
RS0
CSBOOT0-3
FS0-7
RD
CS
CS
CS
RD
OE
OE
VM REG BIT 2
PSEN
VM REG BIT 0
VM REG BIT 1
VM REG BIT 3
VM REG BIT 4
OE
Figure 8. 80C51 Memory Mode – Combined Space Mode
9.1.3.2 Configuration Modes for MCUs with Separate Program and Data Spaces
9.1.3.2.1 Separate Space Modes
Code memory space is separated from data memory space. For example, the PSEN
signal is used to access the program code from the main Flash Memory, while the RD
signal is used to access data from the secondary Flash memory, SRAM and I/O Ports.
This configuration requires the VM register to be set to 0Ch.
9.1.3.2.2 . Combined Space Modes
The program and data memory spaces are combined into one space that allows the main
Flash Memory, secondary Flash memory, and SRAM to be accessed by either PSEN or
RD. For example, to configure the main Flash memory in combined space mode, bits 2
and 4 of the VM register are set to
1
.
9.1.3.3 80C51XA Memory Map Example
See Application Notes for examples.
相關PDF資料
PDF描述
PSD835G2-B-20MI Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2-B-20U Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2-B-20UI Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2-B-70B81 Configurable Memory System on a Chip for 8-Bit Microcontrollers
PSD835G2-B-70B81I Configurable Memory System on a Chip for 8-Bit Microcontrollers
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