ST52F510 datasheet(34/106 Pages) STMICROELECTRONICS

34 / 106 page

ST52F510/F513/F514

34/106

A similar procedure can be used to write a single

block:

The

SetPage command is sent, followed by

the page number where the data should be

written

The

IncBlock command is sent as many times

as the block number inside the page (for ex-

ample: to address the block 3 the

IncBlock

must be sent 3 times)

The

WriteBlock command is sent followed by

the 32 data bytes to be written.

After the 32th byte is sent, the device holds

the SCL line low until all the data are not

stored in the memory (about 4.5 ms: 2 ms for

erasing and 2.5 for writing: the same time for

a single byte)

The procedures described previously can be

repeated as many time as needed, without exiting

from Programming Mode or re-sending the Slave

Address again.

The commands ByteErase and BlockErase, used

instead of ByteWrite and BlockWrite, erase (put all

bit to 0) the specified memory location or block.

4.2.4 Option Bytes Programming. The

Option

Byte addresses cannot be accessed with a

sequential procedure like the one described in

Section

4.2.2.

Actually,

the

pointers

are

automatically incremented up to the last block or

address in page 31. A further increment sets all the

pointers to 0.

The Option Byte addresses (located at page 48,

block 0, addresses 0-7) must be accessed with a

direct addressing procedure as the one described

in Section 4.2.3.

If the Fast Programming procedure is used, it must

be followed by a Random Block Writing procedure

to program the Option Bytes. The other 24 bytes of

the block can be written with dummy or user

values. The blocks 0, 1, 2 and 3 of Page 48 can be

used for writing data as well (see Section 4.5) and

for locking the device (see Section 4.4).

Figure 4.2 Programming Procedures

Fast Programming Procedure

Random Byte Writing Procedure

Random Block Writing Procedure

Option Byte Writing Procedure

S=Start, P=Stop, A=Acknowledge, NA=Non-acknowledge

From Slave to Master

From Master to Slave

S 10100000

00000000

GlobalErase

FastBlockWrite

Data0

.....

Data31

IncBlock

FastBlockWrite

.....

Data31

.....

Data31

.....

SetPage

Page Address

ByteWrite

Byte Address

AData

Command

.....

SetPage

Page Address

IncBlock

.....

IncBlock

BlockWrite

Data0

.....

Data31

Command

.....

SetPage

00110000

WriteBlock

Option Byte 0

.....

Option Byte 7

.....

Dummy 0

.....

Dummy 23

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