參數(shù)資料
型號: PSD913F1V
英文描述: 130V 100kRad Hi-Rel Single N-Channel SEE Hardened MOSFET in a SMD-2 package; A IRHNA57163SE with Standard Packaging
中文描述: Flash在系統(tǒng)可編程微控制器外設(shè)
文件頁數(shù): 31/94頁
文件大?。?/td> 463K
代理商: PSD913F1V
PSD913F1
Preliminary
30
Level 1
SRAM, I/O
Level 2
EEPROM Memory
Highest Priority
Lowest Priority
Level 3
Flash Memory
Figure 7. Priority Level of Memory and I/OComponents
9.1.3.1. Memory Select Configuration for MCUs with Separate Program and Data Spaces
The 8031 and compatible family of microcontrollers, which includes the 80C51, 80C151,
80C251, 80C51XA, and the C500 family, have separate address spaces for code memory
(selected using PSEN) and data memory (selected using RD). Any of the memories within
the PSD913F1 can reside in either space or both spaces. This is controlled through manip-
ulation of the VM register that resides in the PSD
s CSIOP space.
The VM register is set using PSDsoft to have an initial value. It can subsequently be
changed by the microcontroller so that memory mapping can be changed on-the-fly.
For example, I may wish to have SRAM and Flash in Data Space at boot, and EEPROM in
Program Space at boot, and later swap EEPROM and Flash. This is easily done with
the VM register by using PSDsoft to configure it for boot up and having the microcontroller
change it when desired.
Table 12 describes the VM Register.
Bit 7*
Bit 6*
Bit 5*
Bit 4
FL_Data EE_Data
Bit 3
Bit 2
FL_Code
Bit 1
EE_Code SRAM_Code
Bit 0
*
*
*
0 = RD
can
t
access
Flash
0 = RD
can
t
access
EEPROM
0 = PSEN
can
t
access
Flash
0 = PSEN
can
t
access
EEPROM
0 = PSEN
can
t
access
SRAM
*
*
*
1 = RD
access
Flash
1 = RD
access
EEPROM
1 = PSEN
access
Flash
1 = PSEN
access
EEPROM
1 = PSEN
access
SRAM
Table 12. VM Register
NOTE:
Bits 5-7 are not used, should set to
0
.
The
PSD913F1
Functional
Blocks
(cont.)
相關(guān)PDF資料
PDF描述
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PSD913F2V 200V 100kRad Hi-Rel Single N-Channel TID Hardened MOSFET in a SMD-2 package; A IRHNA7260 with Standard Packaging
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PSD913F2 Configurable Memory System on a Chip for 8-Bit Microcontrollers(用于8位MCU的可配置存儲器系統(tǒng))
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