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參數(shù)資料
| 型號(hào)： | UPSD3253B-40T6 |
| 廠商： | STMICROELECTRONICS |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | PLASTIC, TQFP-52 |
| 文件頁(yè)數(shù)： | 26/189頁(yè) |
| 文件大?。?/td> | 1638K |
| 代理商： | UPSD3253B-40T6 |
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Obsolete
Product(s)
- Obsolete
Product(s)
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Memory blocks
121/189
Suspend Sector Erase is accepted only during an Erase cycle and defaults to READ mode.
A Suspend Sector Erase instruction executed during an Erase time-out period, in addition to
suspending the Erase cycle, terminates the time out period.
The Toggle Flag bit (DQ6) stops toggling when the internal logic is suspended. The status of
this bit must be monitored at an address within the Flash memory sector being erased. The
Toggle Flag bit (DQ6) stops toggling between 0.1s and 15s after the Suspend Sector
Erase instruction has been executed. The Flash memory is then automatically set to READ
mode.
If an Suspend Sector Erase instruction was executed, the following rules apply:
●
Attempting to read from a Flash memory sector that was being erased outputs invalid
data.
●
Reading from a Flash sector that was not being erased is valid.
●
The Flash memory cannot be programmed, and only responds to Resume Sector
Erase and Reset Flash instructions (READ is an operation and is allowed).
●
If a Reset Flash instruction is received, data in the Flash memory sector that was being
erased is invalid.
22.7.4
Resume Sector Erase
If a Suspend Sector Erase instruction was previously executed, the erase cycle may be
resumed with this instruction. The Resume Sector Erase instruction consists of writing 030h
to any address while an appropriate Sector Select (FS0-FS7 or CSBOOT0-CSBOOT3) is
High. (See Table 85.)
22.8
Specific features
22.8.1
Flash memory sector protect
Each primary and secondary Flash memory sector can be separately protected against
Program and Erase cycles. Sector Protection provides additional data security because it
disables all Program or Erase cycles. This mode can be activated through the JTAG Port or
a Device Programmer.
Sector protection can be selected for each sector using the PSDsoft Express Configuration
program. This automatically protects selected sectors when the device is programmed
through the JTAG Port or a Device Programmer. Flash memory sectors can be unprotected
to allow updating of their contents using the JTAG Port or a Device Programmer. The MCU
can read (but cannot change) the sector protection bits.
Any attempt to program or erase a protected Flash memory sector is ignored by the device.
The Verify operation results in a READ of the protected data. This allows a guarantee of the
retention of the Protection status.
The sector protection status can be read by the MCU through the Flash memory protection
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPSD3334D-40U6 | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP80 |
| US1001FL | 0.5 A, 100 V, SILICON, SIGNAL DIODE |
| US1A-HE3 | 1 A, 50 V, SILICON, SIGNAL DIODE, DO-214AC |
| US1B-HE3 | 1 A, 100 V, SILICON, SIGNAL DIODE, DO-214AC |
| US1G-HE3 | 1 A, 400 V, SILICON, SIGNAL DIODE, DO-214AC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPSD3253B-40T6T | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3253B-40U1 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3253B-40U1T | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3253B-40U6 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3253B-40U6T | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
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