AT30TSE004_14 Datasheet, PDF (4/47 Pages) ATMEL Corporation – Integrated Temperature Sensor with Serial EEPROM

1. Description
The Atmel^® AT30TSE004 is a combination Serial EEPROM and temperature sensor device containing 4096-bits of
Serially Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 512-bytes of eight bits
each. The Serial EEPROM operation is tailored specifically for DRAM memory modules with Serial Presence Detect
(SPD) to store a module’s vital product data such as the module’s size, speed, voltage, data width, and timing
parameters.
The AT30TSE004 is protocol compatible with the legacy JEDEC TSE2002av specification (2-Kbit) devices enabling the
AT30TSE004 to be utilized in legacy applications without any software changes. The Serial EEPROM deploys special
software commands to allow users to identify and set which half of the memory the internal address counter is located.
This special page addressing method used to select the upper or lower half of the Serial EEPROM is the key to the
legacy compatibility. However, there is one minor exception to the legacy compatibility as the AT30TSE004 does not
support the Permanent Write Protection feature because it was removed from the JEDEC TSE2004a (DDR4)
specification.
In addition, the Serial EEPROM incorporates a Reversible Software Write Protection (RSWP) feature enabling the ability
to selectively write protect any or all of the four 128-byte quadrants. Once the RSWP is set, it can only be reversed by
sending a special software command sequence.
The integrated temperature sensor converts temperatures from -20C to +125C to a digital word and provides an
accuracy of ±1°C (max.) in the temperature range +75C to +95C. The temperature sensor continuously monitors
temperature and updates the data in the Temperature Register at least eight times per second. The temperature data is
latched internally by the device and may be read by software via a bus Master at anytime (even when the Serial
EEPROM is busy writing data to the memory).
The AT30TSE004 incorporates flexible user programmable internal registers to configure the temperature sensor’s
performance and response to over and under temperature conditions. The device contains flexible programmable high,
low, and critical temperature limits. The EVENT pin is an active low output and can be configured to operate as an
Interrupt or as a Comparator output. The Manufacturer and Device ID Registers provide the ability to confirm the identity
of the device. The AT30TSE004 supports the industry standard 2-wire I²C FM plus (Fast Mode +) serial interface
allowing device communication to operate up to 1MHz. A bus timeout feature is supported for both temperature sensor
and Serial EEPROM operations to help prevent system lock-ups. The AT30TSE004 is available in space saving 8-lead
UDFN and WDFN packages.
The UDFN is the recommended and preferred package.
Atmel AT30TSE004 [PRELIMINARY DATASHEET]
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8816B–DTS–12/2012