ST52F510 datasheet(32/106 Pages) STMICROELECTRONICS

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ST52F510/F513/F514

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4.2 Memory Programming

The Programming procedure writes the user

program

and

data into the Flash Memory,

EEPROM and Option Bytes. The programming

procedures are entered by setting the Vpp pin

equal to Vdd and releasing the Reset signal. The

following pins are used in Programming mode:

VPP

used to switch to programming mode

VDD

device supply

VSS

device ground

RESET

device reset

SCL

I2C serial clock

SDA

I2C serial data

During the device programming, the internal clock

is used, so the OSCin and OSCout pins don’t have

to be considered.

4.2.1 Programming Mode start. The

following

sequence starts the Programming Mode:

VPP is set to VDD

The device is Reset (RESET=VSS)

The Reset is released (RESET=VDD)

The internal oscillator starts at 10 MHz

The memory is turned on

The I2C Interface and Ports are initialized

The I2C Interface is configured to work as

Slave, Receiver, 7-bit address and waits for

data

The Start signal is sent to the chip followed by

the Slave Address 1010000 and the direction

bit set to 0 (the addressed slave waits for da-

ta). The device sends the acknowledge

The Programming Mode code 00000000 is

sent and acknowledged

10. A command code is sent to the device

11. The procedure related to the command is ex-

ecuted

Table 4.2 Programming Mode Commands

Command

Code

Data in

Data out Erase

Description

BlockWrite

00000001

Yes

Write the currently addressed block with the 32 bytes

following the command. The Block locations are erased

before being written.

ByteWrite

00000010

Yes

Write the byte addressed by the next data sent in the

currently addressed page.

BlockErase

00000011

Yes

Erase the block addressed by 3 MSB of the next data sent

and inside the currently addressed page.

ByteErase

00000100

Yes

Erase the byte addressed by the next data sent and inside

the currently addressed page.

ByteRead

00000101

Read the byte addressed by the next data sent and inside

the current page. The read data is sent by the device after

the re-send of the Slave Address with the R/W bit changed.

GlobalErase

00001001

Yes

All the memory is erased.

FastBlockWrite 00001011

Write the currently addressed block with the 32 bytes

following the command. The Block locations aren’t erased.

SetPage

00001100

The currently addressed page is set with the next data sent.

ReadData

00001101

Read the memory location currently addressed. The read

data is sent by the device after the command is

acknowledged. The current memory absolute address is

post-incremented.

IncBlock

00001111

The current block address is incremented modulo 8

(address 0 follows after address 7 and the Page is post-

incremented)

ReadStatus

00010011

This command is followed by a status data byte. Mostly

used in error condition and to check if the device is locked

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