SE97TP datasheet(25/55 Pages) NXP

25 / 55 page

SE97_7

Product data sheet

Rev. 07 — 29 January 2010

25 of 55

NXP Semiconductors

SE97

DDR memory module temp sensor with integrated SPD, 3.3 V

8.3 Configuration register (01h, 16-bit read/write)

Table 11.

Configuration register (address 01h) bit allocation

Bit

Symbol

RFU

HEN

SHMD

Default

000

0000

Access

RRR

R/W

Bit

Symbol

CTLB

AWLB

CEVNT

ESTAT

EOCTL

CVO

EMD

Default

000

Access

R/W

Table 12.

Configuration register (address 01h) bit description

Bit

Symbol

Description

15:11 RFU

reserved for future use; must be ‘0’.

10:9

HEN

Hysteresis Enable.

00 — disable hysteresis (default)

01 — enable hysteresis at 1.5

°C

10 — enable hysteresis at 3

°C

11 — enable hysteresis at 6

°C

When enabled, hysteresis is applied to temperature movement around trigger

points. For example, consider the behavior of the ‘Above Alarm Window’ bit

(bit 14 of the Temperature register) when the hysteresis is set to 3

°C. As the

temperature rises, bit 14 will be set to ‘1’ (temperature is above the alarm

window) when the Temperature register contains a value that is greater than the

value in the Alarm Temperature Upper Boundary register. If the temperature

decreases, bit 14 will remain set until the measured temperature is less than or

equal to the value in the Alarm Temperature Upper Boundary register minus

°C. (Refer to Figure 8 and Table 13).

Similarly, the ‘Below Alarm Window’ bit (bit 13 of the Temperature register) will

be set to ‘0’ (temperature is equal to or above the Alarm Window Lower

Boundary Trip register) when the value in the Temperature register is equal to or

greater than the value in the Alarm Temperature Lower Boundary register. As

the temperature decreases, bit 13 will be set to ‘1’ when the value in the

Temperature register is equal to or less than the value in the Alarm Temperature

Lower Boundary register minus 3

°C. Note that hysteresis is also applied to

EVENT pin functionality.

When either of the Critical Trip or Alarm Window lock bits is set, these bits

cannot be altered until unlocked.

SE97TP Datasheet(PDF) 25 Page - NXP Semiconductors

SE97TP Datasheet(HTML) 25 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Datasheet Download

Link URL