參數(shù)資料
型號： uPSD3251
廠商： 意法半導(dǎo)體
英文描述： Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的Flash可編程系統(tǒng)設(shè)備)
中文描述： 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核（帶8032微控制器內(nèi)核的閃存可編程系統(tǒng)設(shè)備）
文件頁數(shù)： 85/128頁
文件大?。?/td> 1566K
代理商： UPSD3251
85/128
μPSD3251F
Memory Select Configuration in Program and
Data Spaces.
The MCU Core has separate ad-
dress spaces for Program memory and Data
memory. Any of the memories within the PSD
Module can reside in either space or both spaces.
This is controlled through manipulation of the VM
Register that resides in the CSIOP space.
The VM Register is set using PSDsoft Express to
have an initial value. It can subsequently be
changed by the MCU so that memory mapping
can be changed on-the-fly.
For example, you may wish to have SRAM and pri-
mary Flash memory in the Data space at Boot-up,
and secondary Flash memory in the Program
space at Boot-up, and later swap the primary and
secondary Flash memories. This is easily done
with the VM Register by using PSDsoft Express
Configuration to configure it for Boot-up and hav-
ing the MCU change it when desired. Table 64 de-
scribes the VM Register.
Table 64. VM Register
Note: 1.
“
Not used
”
bits should be set to '0.'
Bit 7
Bit 6
Bit 5
Bit 4
Primary
FL_Data
Bit 3
Secondary
Data
Bit 2
Primary
FL_Code
Bit 1
Secondary
Code
Bit 0
SRAM_Code
Not
used
(1)
Not
used
(1)
Not
used
(1)
0 = RD
can
’
t access
Flash memory
0 = RD
can
’
t access
Secondary
Flash memory
0 = PSEN
can
’
t access
Flash memory
0 = PSEN
can
’
t access
Secondary
Flash memory
0 = PSEN
can
’
t access
SRAM
Not
used
(1)
Not
used
(1)
Not
used
(1)
1 = RD
access Flash
memory
1 = RD access
Secondary
Flash memory
1 = PSEN
access Flash
memory
1 = PSEN
access
Secondary
Flash memory
1 = PSEN
access SRAM
相關(guān)PDF資料
PDF描述
uPSD3253AV-24T1T Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3253B Two and Three Channel Codewheels
UPSD3253BV Flash Programmable System Devices with 8032 Microcontroller Core
uPSD3254B-24T1T Flash Programmable System Devices with 8032 Microcontroller Core
uPSD3254B-40T6T Flash Programmable System Devices with 8032 Microcontroller Core
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
uPSD3251MEB 制造商:P&S 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core 制造商:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3253 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core and 256Kbit SRAM
UPSD3253A-24T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3253A-24T1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3253A-24T6 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*