ST10F273E datasheet(31/179 Pages) STMICROELECTRONICS

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ST10F273E

Internal Flash memory

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5.4.3

Flash control register 1 low

The Flash Control Register 1 Low (FCR1L), together with Flash Control Register 1 High

(FCR1H), is used to select the sectors to Erase or, during any write operation, to monitor the

status of each sector and bank.

FCR1L (0x0E 0004)

FCR

Reset value: 0000h

SUSP

Suspend

This bit must be set to suspend the current Program (Word or Double Word) or Sector Erase

operation in order to read data in one of the sectors of the bank under modification or to program

data in another bank. The Suspend operation resets the Flash bank to normal read mode

(automatically resetting bits BSYx). When in Program Suspend, the Flash module accepts only the

following operations: Read and Program Resume. When in Erase Suspend the module accepts

only the following operations: Read, Erase Resume and Program (Word or Double Word; Program

operations cannot be suspended during Erase Suspend). To resume a suspended operation, the

WMS bit must be set again, together with the selection bit corresponding to the operation to

resume (WPG, DWPG, SER).(1)

WMS

Write mode start

This bit must be set to start every write operation in the Flash module. At the end of the write

operation or during a Suspend, this bit is automatically reset. To resume a suspended operation,

this bit must be set again. It is forbidden to set this bit if bit ERR of FER is high (the operation is not

accepted). It is also forbidden to start a new write (program or erase) operation (by setting WMS

high) when bit SUSP of FCR0 is high. Resetting this bit by software has no effect.

It is forbidden to start a new Write operation with bit SUSP already set.

Table 8.

Flash control register 0 high (continued)

Bit

Function

9876543210

reserved

B0F9 B0F8 B0F7 B0F6 B0F5 B0F4 B0F3 B0F2 B0F1 B0F0

Table 9.

Flash control register 1 low

Bit

Function

B0F(9:0)

Bank 0 IFlash sector 9:0 status

These bits must be set during a Sector Erase operation to select the sectors to erase in Bank 0.

Besides, during any erase operation, these bits are automatically set and give the status of the 10

sectors of Bank 0 (B0F9-B0F0). The meaning of B0Fy bit for Sector y of Bank 0 is given by the

Table 11 Banks (BxS) and Sectors (BxFy) Status bits meaning. These bits are automatically

reset at the end of a Write operation if no errors are detected.

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