Temperature Sensor With SPD EEPROM
The temperature sensor continuously monitors the module's temperature and can be
read back at any time over the I
2
C bus shared with the serial presence-detect (SPD) EE-
PROM. Refer to JEDEC JC-42.4 EE1004 and TSE2004 device specifications for complete
details.
SPD Data
For the latest SPD data, refer to Micron's SPD page: micron.com/SPD.
Table 14: Temperature Sensor With SPD EEPROM Operating Conditions
Parameter/Condition Symbol Min Nom Max Units
Supply voltage V
DDSPD
– 2.5 – V
Input low voltage: logic 0; all inputs V
IL
–0.5 – V
DDSPD
× 0.3 V
Input high voltage: logic 1; all inputs V
IH
V
DDSPD
× 0.7 – V
DDSPD
+ 0.5 V
Output low voltage: 3mA sink current V
DDSPD
> 2V V
OL
– – 0.4 V
Input leakage current: (SCL, SDA) V
IN
= V
DDSPD
or V
SSSPD
I
LI
– – ±5 µA
Output leakage current: V
OUT
= V
DDSPD
or V
SSSPD
, SDA in High-Z I
LO
– – ±5 µA
Table 15: Temperature Sensor and EEPROM Serial Interface Timing
Parameter/Condition Symbol Min Max Units
Clock frequency
f
SCL 10 1000 kHz
Clock pulse width HIGH time
t
HIGH 260 – ns
Clock pulse width LOW time
t
LOW 500 – ns
Detect clock LOW timeout
t
TIMEOUT 25 35 ms
SDA rise time
t
R – 120 ns
SDA fall time
t
F – 120 ns
Data-in setup time
t
SU:DAT 50 – ns
Data-in hold time
t
HD:DI 0 – ns
Data out hold time
t
HD:DAT 0 350 ns
Start condition setup time
t
SU:STA 260 – ns
Start condition hold time
t
HD:STA 260 – ns
Stop condition setup time
t
SU:STO 260 – ns
Time the bus must be free before a new transi-
tion can start
t
BUF 500 – ns
Write time
t
W – 5 ms
Warm power cycle time off
t
POFF 1 – ms
Time from power-on to first command
t
INIT 10 – ms
8GB (x72, ECC, DR) 288-Pin DDR4 UDIMM
Temperature Sensor With SPD EEPROM
PDF: 09005aef84f8c394
asf18c1gx72az.pdf – Rev. F 12/15 EN
18
Micron Technology, Inc. reserves the right to change products or specifications without notice.
© 2013 Micron Technology, Inc. All rights reserved.
