ST92F150CR1QB View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92F150CR1QB

8/16-BIT SINGLE VOLTAGE FLASH MCU FAMILY WITH RAM, E³ ™ (EMULATED EEPROM), CAN 2.0B AND J1850 BLPD

STMicroelectronics 

ST92F124/F150/F250 - SINGLE VOLTAGE FLASH & E3 TM (EMULATED EEPROM)

3.4 WRITE OPERATION EXAMPLE

Each operation (both Flash and E3 TM) is activated

by a sequence of instructions like the following:

OR FCR, #OPMASK ;Operation selection

LD ADD1, #DATA1 ;1st Add and Data

LD ADD2, #DATA2 ;2nd Add and Data

.. ...., ......

LD ADDn, #DATAn ;nth Add and Data

;n range = (1 to 16)

OR FCR, #80h ;Operation start

The first instruction is used to select the desired

operation by setting its corresponding selection bit

in the Control Register (FCR for Flash operations,

ECR for E3 TM operations).

The load instructions are used to set the address-

es (in the Flash or in the E3 TM memory space) and

the data to be modified.

The last instruction is used to start the write oper-

ation, by setting the start bit (FWMS for Flash op-

erations, EWMS for E3 TM operation) in the Control

register.

Once selected, but not yet started, one operation

can be cancelled by resetting the operation selec-

tion bit. Any latched address and data will be reset.

Warning: during the Flash Page Program or the E3

TM Page Update operation it is forbidden to change

the page address: only the last page address is ef-

fectively kept and all programming will effect only

that page.

A summary of the available Flash and E3 TM write

operations are shown in the following tables:

Table 11. Flash Write Operations

Operation

Byte Program

Page Program

Sector Erase

Sector Erase Suspend

Chip Erase

Set Protection

Selection bit

FBYTE

FPAGE

FSECT

FSUSP

FCHIP

PROT

Addresses and Data

1 byte

From 1 to 16 bytes

From 1 to 4 sectors

None

None

From 1 to 4 bytes

Start bit

FWMS

FWMS

FWMS

None

FWMS

FWMS

Typical Duration

10 µs

160 µs (16 bytes)

1.5 s (1 sector)

15 µs

3s

40 µs (4 bytes)

Table 12. E3 TM Write Operations

Operation

Page Update

Chip Erase

Selection bit

EPAGE

ECHIP

Addresses and Data

From 1 to 16 bytes

None

Start bit

EWMS

EWMS

Typical Duration

30 ms

60/429

9

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