STTS2002_11 STMICROELECTRONICS [STMicroelectronics], STTS2002_11 Datasheet - Page 36

• Manufacturer Part Number: STTS2002_11
• Description: 2.3 V memory module temperature sensor with a 2 Kb SPD EEPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SPD EEPROM operation
5.6
5.6.1
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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 1
Random address read - SPD
A dummy write is first performed to load the address into this address counter (as shown in
Figure
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.
be identical.
14) but without sending a stop condition. Then, the bus master sends another start
CURRENT
ADDRESS
READ
RANDOM
ADDRESS
READ
SEQUENTIAL
CURRENT
READ
SEQUENTIAL
RANDOM
READ
DEV SEL
DEV SEL
DEV SEL
DEV SEL
ACK
Doc ID 15389 Rev 5
DATA OUT N
(1)
(1)
R/W
R/W
R/W
R/W
ACK
ACK
ACK
ACK
NO ACK
BYTE ADDR
BYTE ADDR
DATA OUT 1
DATA OUT
NO ACK
ACK
ACK
ACK
DEV SEL
DEV SEL
(1)
(1)
ACK
ACK
ACK
R/W
R/W
DATA OUT N
DATA OUT 1
DATA OUT
st
and 3
rd
NO ACK
NO ACK
ACK
bytes) must
STTS2002
AI01942