SA56004GD datasheet(11/36 Pages) NXP

11 / 36 page

SA56004X_5

Product data sheet

Rev. 05 — 22 May 2008

11 of 36

NXP Semiconductors

SA56004X

Digital temperature sensor with overtemperature alarms

[1]

POR default TH = 0Ah (10

°C).

7.8.7 Programmable offset register (remote only)

[1]

POR default RTOHB = RTOLB = 00h.

[2]

POR default RTOLB = 00h.

7.8.8 ALERT mode register (AM)

D[7:1] is not deﬁned and defaults to logic 0.

D0: The ALERT output is in interrupt mode when this bit is LOW. The ALERT output is in

comparator mode when this bit is HIGH.

7.8.9 Other registers

The Manufacturers ID register has a default value A1h (1010 0001) and a read address

FEh.

The Die Revision Code register has a default value 00h (0000 0000) and read address

FFh. This register will increment by 1 every time there is a revision to the die.

7.8.10 One-shot register

The one-shot register is used to initiate a single conversion and comparison cycle when

the device is in the standby mode; upon completion of the single conversion cycle, the

device returns to the standby mode. It is not a data register; it is the write operation that

causes the one-shot conversion. The data written to this register is not stored; an FFh

value will always be read from this register. To initiate a one-shot operation, send a

standard write command with the command byte of 0Fh (One-Shot Write Address).

Table 13.

TH - T_CRIT hysteresis register

Byte

Single high byte (read/write address 21h)[1]

Bit

Value

Table 14.

RTOHB, RTOLB - Remote temperature offset registers

Byte

High byte (read/write address 11h)[1]

Low byte (read/write address 12h)[2]

Bit

Value

sign

8421

0.5

0.25

0.125

00000

Table 15.

AM - ALERT mode register

Read and write address BFh.

Bit

Value

ALERT mode

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