ST92F250CV2 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92F250CV2

8/16-bit single voltage Flash MCU family with RAM, E³ TM (emulated EEPROM), CAN 2.0B and J1850 BLPD

STMicroelectronics 

ST92F124xx/ST92F150Cxx/ST92F150JDV1/ST92F250CV2Single voltage Flash and E3™ (emulated

Bit 4 = FBYTE: Flash byte program (Read/Write). This bit must be set to select the Byte

Program operation in Flash memory. This bit is automatically reset at the end of the Byte

Program operation.

The Byte Program operation allows “0”s to be programmed in place of “1”s. Data to be

programmed and an address in which to program must be provided (through an LD

instruction, for example) before starting execution by setting bit FWMS.

0: Deselect byte program

1: Select byte program

Bit 3 = FSECT: Flash sector erase (Read/Write). This bit must be set to select the Sector

Erase operation in Flash memory. This bit is automatically reset at the end of the Sector

Erase operation.

The Sector Erase operation erases all the Flash locations to FFh. From 1 to 6 sectors (F0-

F5) can be simultaneously erased. These sectors can be entered before starting the

execution by setting the FWMS bit. An address located in the sector to erase must be

provided (through an LD instruction, for example), while the data to be provided is don’t

care. It is not necessary to pre-program the sectors to 00h, because this is done

automatically.

0: Deselect sector erase

1: Select sector erase

Bit 2 = FSUSP: Flash sector erase suspend (Read/Write).

This bit must be set to suspend the current Sector Erase operation in Flash memory in order

to read data to or from program data to a sector not being erased. The FSUSP bit must be

reset (and FWMS must be set again) to resume a suspended Sector Erase operation.

The Erase Suspend operation resets the Flash memory to normal read mode (automatically

resetting bit FBUSY) in a maximum time of 15μs.

When in Erase Suspend the memory accepts only the following operations: Read, Erase

Resume and Byte Program. Updating the E3 TM memory is not possible during a Flash Erase

Suspend.

0: Resume sector erase when FWMS is set again.

1: Suspend Sector erase

Bit 1 = PROT: Set Protection (Read/Write).

This bit must be set to select the Set Protection operation. This bit is automatically reset at

the end of the Set Protection operation.

The Set Protection operation allows “0”s in place of “1”s to be programmed in the four Non

Volatile Protection registers. From 1 to 4 bytes can be entered (in any order, no need for an

ordered address sequence) before starting the execution by setting the FWMS bit. Data to

be programmed and addresses in which to program must be provided (through an LD

instruction, for example). Protection contained in addresses that are not entered are left

unchanged.

0: Deselect protection

Doc ID 8848 Rev 7

81/523

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