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STTS2002 Datasheet(PDF) 36 Page - STMicroelectronics

No. de pieza STTS2002
Descripción Electrónicos  2.3 V memory module temperature sensor with a 2 Kb SPD EEPROM
PDF  52 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STTS2002 Datasheet(HTML) 36 Page - STMicroelectronics

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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
1.
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
ACK
R/W
ACK
ACK
ACK
NO ACK
R/W
NO ACK
ACK
ACK
R/W
ACK
ACK
R/W
ACK
NO ACK



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