ADP1055ACPZ-R7 datasheet(55/140 Pages) AD

55 / 140 page

Data Sheet

ADP1055

Rev. A | Page 55 of 140

Read three bytes from Page 6.

Note that the block read command can read a maximum of

255 bytes for any single transaction.

WRITE OPERATION (BYTE WRITE AND BLOCK

WRITE)

Write to Main Block, Page 0 and Page 5

Page 0 and Page 1 of the main block are reserved for storing the

default settings and user settings, respectively. Page 2 through

Page 5 of the main block are reserved for storing the black box

information, GUI settings, and factory tracking information. The

user cannot perform a direct write operation to any page from

Page 0 to Page 5 using the EEPROM_PAGE_00 to EEPROM_

PAGE_05 commands. A user write to these pages returns a no

acknowledge. To program the register contents of Page 1 of the

main block, it is recommended that the STORE_USER_ALL

command be used (Register 0x15). See the Save Register

Settings to User Settings section.

Write to Main Block, Page 6 to Page 15

Before performing a write to Page 6 through Page 15 of the

main block, the user must first unlock the EEPROM (see the

Unlock the EEPROM section).

Data in Page 6 to Page 15 of the EEPROM main block can be

programmed (written to) one byte at a time or in multiple bytes

in series using the EEPROM_PAGE_xx commands (Register 0xB6

to Register 0xBF). Before executing this command, the user can

program the offset from the page boundary where the first byte

is written using the EEPROM_ADDR_OFFSET command

(Register 0xD3).

If the targeted page has not yet been erased, the user can erase

the page as described in the Page Erase Operation section.

In the following example, four bytes are written to Page 9,

starting from the 256th byte of that page.

Set address offset = 256.

Write four bytes to Page 9.

Note that the block write command can write a maximum of

255 bytes for any single transaction.

EEPROM PASSWORD

On power-up, the EEPROM is locked and protected from

accidental writes or erases. Only reads from Page 6 to Page 15 of

the main block are allowed when the EEPROM is locked. Before

any data can be written (programmed) to the EEPROM, the

EEPROM must be unlocked for write access. After it is unlocked,

the EEPROM is opened for reading, writing, and erasing.

Unlock the EEPROM

To unlock the EEPROM, perform two consecutive writes with

the correct password (default = 0xFF) using the EEPROM_

PASSWORD command (Register 0xD5). The EEPROM_

UNLOCKED flag (Register 0xFE93, Bit 15) is set to indicate

that the EEPROM is unlocked for write access.

Lock the EEPROM

To lock the EEPROM, write any byte other than the correct

password using the EEPROM_PASSWORD command (Register

0xD5). The EEPROM_UNLOCKED flag (Register 0xFE93,

Bit 15) is cleared to indicate that the EEPROM is locked from

write access.

Change the EEPROM Password

To change the EEPROM password, follow these steps:

Enter the correct 32-bit key code using the KEY_CODE

command (Register 0xD7).

Write the old password using the EEPROM_PASSWORD

command (Register 0xD5).

Immediately write the new password using the EEPROM_

PASSWORD command (Register 0xD5).

The password is now changed to the new password. Save the new

password to the user settings by executing the STORE_USER_ALL

command (Register 0x15).

7-BIT

SLAVE

ADDRESS

7-BIT

SLAVE

ADDRESS

0xB6

BYTE

COUNT = 0x03

DATA

BYTE 3

DATA

BYTE 1

...

= MASTER-TO-SLAVE

= SLAVE-TO-MASTER

7-BIT

SLAVE

ADDRESS

W A

0x00

AA P

0xD3

0x01

= MASTER-TO-SLAVE

= SLAVE-TO-MASTER

7-BIT

SLAVE

ADDRESS

BYTE

COUNT = 4

0xB9

DATA BYTE 1

DATA BYTE 4

...

= MASTER-TO-SLAVE

= SLAVE-TO-MASTER

ADP1055ACPZ-R7 Datenblatt(PDF) 55 Page - Analog Devices

ADP1055ACPZ-R7 Datenblatt(HTML) 55 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datenblatt Download

Link URL