MT18HTS25672RHZ-80EH1 Datasheet MT18HTS25672RHZ-667H1, MT18HTS25672RHZ-80EH1 | P16-P18

Figure 3: EVENT# Pin Functionality

Time

Temperature

Critical

Alarm window (MAX)

Alarm window (MIN)

EVENT#

interrupt mode

EVENT#

comparator mode

EVENT#

critical temperature only mode

Clears event

Hysteresis affects

these trip points

Table 14: Temperature Sensor Registers

Name Address Power-on Default

Pointer register Not applicable Undefined

Capability register 0x00 0x0001

Configuration register 0x01 0x0000

Alarm temperature upper boundary register 0x02 0x0000

Alarm temperature lower boundary register 0x03 0x0000

Critical temperature register 0x04 0x0000

Temperature register 0x05 Undefined

Pointer Register

The pointer register selects which of the 16-bit registers is being accessed in subsequent

READ and WRITE operations. This register is a write-only register.

2GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM

Temperature Sensor with Serial Presence-Detect EEPROM

PDF: 09005aef83f287c1

hts18c256x72rhz.pdf - Rev. A 3/10 EN

Micron Technology, Inc. reserves the right to change products or specifications without notice.

Table 15: Pointer Register Bits 0–7

Bit

7 6 5 4 3 2 1 0

0 0 0 0 Register

select

Table 16: Pointer Register Bits 0–2 Descriptions

Bit

Register2 1 0

0 0 0 Capability register

0 0 1 Configuration register

0 1 0 Alarm temperature upper boundary register

0 1 1 Alarm temperature lower boundary register

1 0 0 Critical temperature register

1 0 1 Temperature register

Capability Register

The capability register indicates the features and functionality supported by the temper-

ature sensor. This register is a read-only register.

Table 17: Capability Register (Address: 0x00)

Bit

15 14 13 12 11 10 9 8

RFU RFU RFU RFU RFU RFU RFU RFU

Bit

7 6 5 4 3 2 1 0

RFU RFU RFU Temperature resolution Wider range Precision Has alarm

and critical

temperature

Table 18: Capability Register Bit Description

Bit Description

0 Basic capability

1: Has alarm and critical trip point capabilities

1 Accuracy

0: ±2°C over the active range and ±3°C over the monitor range

1: ±1°C over the active range and ±2°C over the monitor range

2 Wider range

0: Temperatures lower than 0°C are clamped to a binary value of 0

1: Temperatures below 0°C can be read

2GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM

Temperature Sensor with Serial Presence-Detect EEPROM

PDF: 09005aef83f287c1

hts18c256x72rhz.pdf - Rev. A 3/10 EN

Micron Technology, Inc. reserves the right to change products or specifications without notice.

Table 18: Capability Register Bit Description (Continued)

Bit Description

4:3 Temperature resolution

00: 0.5°C LSB

01: 0.25°C LSB

10: 0.125°C LSB

11: 0.0625°C LSB

15:5 0: Must be set to zero

Configuration Register

Table 19: Configuration Register (Address: 0x01)

Bit

15 14 13 12 11 10 9 8

RFU RFU RFU RFU RFU Hysteresis Shutdown

mode

Bit

7 6 5 4 3 2 1 0

Critical lock

bit

Alarm lock bit Clear event Event output

status

Event output

control

Critical event

only

Event polarity Event mode

Table 20: Configuration Register Bit Descriptions

Bit Description Notes

0 Event mode

0: Comparator mode

1: Interrupt mode

Event mode cannot be changed if either of the lock

bits is set.

1 EVENT# polarity

0: Active LOW

1: Active HIGH

EVENT# polarity cannot be changed if either of the

lock bits is set.

2 Critical event only

0: EVENT# trips on alarm or critical temperature event

1: EVENT# trips only if critical temperature is reached

3 Event output control

0: Event output disabled

1: Event output enabled

4 Event status

0: EVENT# has not been asserted by this device

1: EVENT# is being asserted due to an alarm window

or critical temperature condition

This is a read-only field in the register. The event caus-

ing the event can be determined from the read tem-

perature register.

5 Clear event

0: No effect

1: Clears the event when the temperature sensor is in

the interrupt mode

2GB (x72, ECC, DR) 200-Pin DDR2 SDRAM SORDIMM

Temperature Sensor with Serial Presence-Detect EEPROM

PDF: 09005aef83f287c1

hts18c256x72rhz.pdf - Rev. A 3/10 EN

Micron Technology, Inc. reserves the right to change products or specifications without notice.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P23

MT18HTS25672RHZ-80EH1

Mfr. #:

Buy MT18HTS25672RHZ-80EH1

Manufacturer:

Micron

Description:

MODULE DDR2 SDRAM 2GB 200SORDIMM

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

MT18HTS25672RHZ-80EH1

MT18HTS25672RHZ-80EH1

Products related to this Datasheet