STTS2002 datasheet(36/52 Pages) STMICROELECTRONICS

tên linh kiện	STTS2002

Giải thích chi tiết về linh kiện	2.3 V memory module temperature sensor with a 2 Kb SPD EEPROM

PDF	52 Pages

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SPD EEPROM operation

STTS2002

36/52

Doc ID 15389 Rev 5

5.6

Read operations - SPD

Read operations are performed independently of whether hardware or software protection

has been set.

The device has an internal address counter which is incremented each time a byte is read.

Figure 14.

Read mode sequences - SPD

The seven most significant bits of the device select code of a random read (in the 1st and 3rd bytes) must

be identical.

5.6.1

Random address read - SPD

A dummy write is first performed to load the address into this address counter (as shown in

Figure 14) but without sending a stop condition. Then, the bus master sends another start

condition, and repeats the device select code, with the RW bit set to 1. The device

acknowledges this, and outputs the contents of the addressed byte. The bus master must

not acknowledge the byte, and terminates the transfer with a stop condition.

DEV SEL

(1)

BYTE ADDR

DEV SEL

DATA OUT 1

AI01942

DATA OUT N

CURRENT

ADDRESS

READ

DEV SEL

DATA OUT

RANDOM

ADDRESS

READ

DEV SEL

(1)

DATA OUT

SEQUENTIAL

CURRENT

READ

DATA OUT N

DEV SEL

(1)

BYTE ADDR

SEQUENTIAL

RANDOM

READ

DEV SEL

(1)

DATA OUT 1

ACK

R/W

NO ACK

ACK

R/W

ACK

R/W

ACK

NO ACK

R/W

NO ACK

ACK

R/W

ACK

R/W

ACK

NO ACK

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