Datasheet
Table Of Contents
- Features
- Temperature Sensor Features
- Serial EEPROM Features
- Table of Contents
- 1. Description
- 2. Pin Descriptions and Pinouts
- 3. Block Diagram
- 4. Device Communication
- 5. Device Addressing
- 6. Temperature Sensor
- 6.1 Functional Description
- 6.2 Register Descriptions
- 6.2.1 Pointer Register (8-bit Write Only, Address = N/A)
- 6.2.2 Capability Register (16-bit Read-only, Address = 00h)
- 6.2.3 Configuration Register (16-bit Read/Write, Address = 01h)
- 6.2.4 Upper Limit Register (16-bit Read/Write, Address = 02h)
- 6.2.5 Lower Limit Register (16-bit Read/Write, Address = 03h)
- 6.2.6 Critical Alarm Register (16-bit Read/Write, Address = 04h)
- 6.2.7 Temperature Register (16-bit Read-only, Address = 05h)
- 6.2.8 Manufacturer ID Register (16-bit Read-only, Address = 06h)
- 6.2.9 Device ID Register (16-bit Read-only, Address = 07h)
- 6.3 Temperature Sensor Write Operations
- 6.4 Temperature Sensor Read Operations
- 7. Serial EEPROM
- 8. Electrical Specifications
- 9. Ordering Code Detail
- 10. Ordering Information
- 11. Part Markings
- 12. Package Drawings
- 13. Revision History
AT30TSE004A [DATASHEET]
Atmel-8868C-DTS-AT30TSE004A-Datasheet_122013
4
1. Description
The Atmel
®
AT30TSE004A 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 AT30TSE004A is protocol compatible with the legacy JEDEC TSE2002av specification (2-Kbit) devices
enabling the AT30TSE004A 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 AT30TSE004A 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 -20C to +125C to a digital word and provides
an accuracy of ±1°C (max.) in the temperature range +75C to +95C. 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 AT30TSE004A 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 AT30TSE004A supports the industry standard 2-wire
I
2
C 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 AT30TSE004A is available in space saving 8-lead UDFN and WDFN packages.
The UDFN is the recommended and preferred package.