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
15
AT30TSE004A [DATASHEET]
Atmel-8868C-DTS-AT30TSE004A-Datasheet_122013
6.2.3 Configuration Register (16-bit Read/Write, Address = 01h)
The AT30TSE004A incorporates a 16-bit Configuration Register allowing the user to set key operational
features of the temperature sensor. The Configuration Register functions are described in Table 6-5 and
Table 6-6.
Table 6-5. Configuration Register Bit Distribution
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
Symbol RFU HYSTENB SHTDWN
Default Value 0 0 0 0 0 0 0 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Symbol CRTALML WINLOCK EVTCLR EVTSTS EVTOUT CRITEVT EVTPOL EVTMOD
Default Value 0 0 0 0 0 0 0 0
R/W Access R/W R/W W R R/W R/W R/W R/W
Table 6-6. Configuration Register Bit Description
Bit Symbol Description
15:11 RFU Reserved for Future Use and must be Logic 0.
10:9 HYSTENB
Hysteresis Enable:
00 = 0C Disable hysteresis (Power-on default)
01 = 1.5C Enable hysteresis
10 = 3.0C Enable hysteresis
11 = 6.0C Enable hysteresis
The purpose of these bits is to control the hysteresis applied to the temperature limit trip point
boundaries. The above hysteresis applies to all limits when temperature drops below the user
specified temperature limit trip points.
Note: Hysteresis applies to decreasing temperature only. Once the temperature is above
a given threshold, the temperature must drop below the boundary limit minus
hysteresis in order for a Comparator
EVENT to be cleared.
Example: If these two bits are set to ‘01’ for 1.5C and the Upper Limit is set to 85C, as
temperature rises above 85C, bit 14 of the Temperature Register will be set to a
Logic 1. Bit 14 will remain set until the temperature drops below the threshold
(85C) minus the hysteresis value(83.5C).
Note: Hysteresis is also applied to the EVENT pin functionality. This bit cannot be
changed if the Crit_Alarm or Alarm Window Lock bits is set.
8 SHTDWN
Shutdown Mode:
0 = The temperature sensor is enabled for continuous conversion (power-on default).
1 = The temperature sensor is disabled.
To save power in Shutdown Mode, the temperature sensor is not active and will not generate
interrupts or update the temperature data. The
EVENT pin is deasserted (not driven).
This bit cannot be set to a Logic 1 if either of the Crit_Alarm or Alarm Window Lock bits is set,
however, it can be cleared at any time. The device will respond to protocol commands and the
bus timeout is active when in Shutdown Mode.