參數(shù)資料
型號: PSD413A2V-A-20JI
廠商: 意法半導(dǎo)體
英文描述: Flash In-System Programmable ISP Peripherals For 8-bit MCUs
中文描述: Flash在系統(tǒng)可編程ISP的外設(shè)的8位微控制器
文件頁數(shù): 34/120頁
文件大?。?/td> 563K
代理商: PSD413A2V-A-20JI
PSD813F1-A
Preliminary
30
Level 1
SRAM, I/O, or
Peripheral 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 PSD813F1 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 13 describes the VM Register.
Bit 7
PIO_EN
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 = disable
PIO mode
*
*
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= enable
PIO mode
*
*
1 = RD
access
Flash
1 = RD
access
EEPROM
1 = PSEN
access
Flash
1 = PSEN
access
EEPROM
1 = PSEN
access
SRAM
Table 13. VM Register
NOTE:
Bits 6-5 are not used.
The
PSD813F1
Functional
Blocks
(cont.)
相關(guān)PDF資料
PDF描述
PSO-0505 ECONOLING - DC/DC - CONVERTER
PSOT03C STANDARD CAPACITANCE TVS ARRAY
PSOT03LC-LF-T13 ULTRA LOW CAPACITANCE TVS ARRAY
PSOT03LC-LF-T7 ULTRA LOW CAPACITANCE TVS ARRAY
PSOT03LC-T13 ULTRA LOW CAPACITANCE TVS ARRAY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PSD4-16 制造商:Tamura Corporation of America 功能描述:
PSD4-20 制造商:MICROTRAN 功能描述:POWER TRANSFORMER, 6 VA
PSD4235G2-70U 功能描述:SPLD - 簡單可編程邏輯器件 5.0V 4M 70ns RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池數(shù)量:10 最大工作頻率:66 MHz 延遲時間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:DIP-24
PSD4235G2-90U 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100
PSD4235G2-90UI 功能描述:CPLD - 復(fù)雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100