TMP1827 datasheet(39/65 Pages) TI

39 / 65 page

Table 9-7. Register Scratchpad-1 Update and Program Configuration EEPROM (continued)

HOST TO DEVICE

DEVICE TO HOST

COMMENTS

CRC

Device sends CRC for the register bytes

Reset

Host sends reset to initialize communication

Answer to Reset

Device responds to initialization

MATCHADDR (55h)

Host sends address command to select specific device

DEVICE-1 ADDRESS

Host sends 8 byte for selecting device-1

COPY SCRATCHPAD-1

(48h)

Host sends function command to write copy scratchpad-1 to configuration

EEPROM

Bus idle for tPROG for

Bus is held in idle state (high) during configuration EEPROM erase-program

9.5.4 Single Device EEPROM Programming and Verify

Table 9-8 shows the correct procedure the host must execute to update the EEPROM. When communicating

with a single device, the host may use the SKIPADDR command. However when communicating with multiple

devices, the host must use the MATCHADDR command or the FLEXADDR command to address the correct

device. The host writes to the EEPROM scratchpad first, reads it back to verify the content before it copies the

same to the user EEPROM. The copy command is issued with the qualifier byte A5h and the bus is held idle for

the duration of erase and program of the EEPROM. The host shall repeat the sequence for every 8 byte page.

After the locations are programmed, the host may issue an READ EEPROM function with the start address to

read all the bytes. The device shall read back the bytes in page size and put a CRC byte after every page to

ensure that the host shall be able to identify bit corruption using the CRC over a smaller data packet.

As long as the host continues the read operation, the device shall read back 8 bytes of data followed by a CRC

byte. When the device reaches the end of the EEPROM block, the device shall return all 1's to the host.

Table 9-8. Single Device EEPROM Program and Verify Sequence

HOST TO DEVICE

DEVICE TO HOST

COMMENTS

Reset

Host sends reset to initialize communication

Answer to Reset

Device responds to initialization

SKIPADDR (CCh)

Host sends address command to select all device(s)

WRITE SCRATCHPAD-2

(0Fh)

Host sends function command to write to scratchpad-2

2-byte EEPROM Address

Host sends 2-byte EEPROM address where data has to be written with MSB first

and LSB last

8-bytes data

Host sends 8-byte data for the EEPROM address

CRC

Device sends CRC for the address and data

Reset

Host sends reset to initialize communication

Answer to Reset

Device responds to initialization

SKIPADDR (CCh)

Host sends address command to select all device(s)

READ SCRATCHPAD-2

(AAh)

Host sends function command to read from scratchpad-2

2-byte EEPROM Address

Host sends 2-byte EEPROM address for which data has been written with MSB

first and LSB last

8-bytes data

Device sends 8 bytes from scratchpad-2

CRC

Device sends CRC for the 8 bytes

Reset

Host sends reset to initialize communication

Answer to Reset

Device responds to initialization

SKIPADDR (CCh)

Host sends address command to select all device(s)

COPY SCRATCHPAD-2

(55h)

Host sends function command to copy scratchpad-2 to EEPROM

A5h

Host sends qualifier byte for EEPROM program

www.ti.com

TMP1827

SBOSA15A – SEPTEMBER 2022 – REVISED MAY 2023

Submit Document Feedback

Product Folder Links: TMP1827

TMP1827 Datasheet(PDF) 39 Page - Texas Instruments

TMP1827 Datasheet(HTML) 39 Page - Texas Instruments

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

Datasheet Download

Link URL