SE98ATP,547【PDF 16/43 页】IC TEMP SENSOR DDR 8-HWSON

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Sheet目录46

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SE98A_4

Product data sheet

Rev. 04 25 November 2009

16 of 43

NXP Semiconductors

SE98A

DDR memory module temp sensor, 1.7 V to 3.6 V

8. Register descriptions

8.1 Register overview

This section describes all the registers used in the SE98A. The registers are used for

latching the temperature reading, storing the low and high temperature limits, configuring,

the hysteresis threshold and the ADC, as well as reporting status. The device uses the

Pointer register to access these registers. Read registers, as the name implies, are used

for read only, and the write registers are for write only. Any attempt to read from a

write-only register will result in reading zeroes. Writing to a read-only register will have no

effect on the read even though the write command is acknowledged. The Pointer register

is an 8-bit register. All other registers are 16-bit.

A write to reserved registers my cause unexpected results which may result in requiring a

reset by removing and re-applying its power.

Table 5.

Address

POR state

n/a

Pointer register

00h

0037h

Capability register (B grade = 0037h)

01h

0000h

Configuration register

02h

0000h

Upper Boundary Alarm Trip register

03h

0000h

Lower Boundary Alarm Trip register

04h

0000h

Critical Alarm Trip register

05h

n/a

Temperature register

06h

1131h

Manufacturer ID register

07h

A102h

Device ID/Revision register

08h to 21h

0000h

reserved registers

22h

0000h

SMBus register

23h to FFh

0000h

reserved registers

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