SA56004HD,118【PDF 8/43 页】IC TEMP SENSOR DIGITAL 8SOIC

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Sheet目录46

4页 5页 6页 7页 [8页]9页 10页 11页 12页

SA56004X

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 7 25 February 2013

8 of 43

NXP Semiconductors

SA56004X

Digital temperature sensor with overtemperature alarms

7.4 Power-on reset

When power is applied to the SA56004X, the device enters its Power-On Reset (POR)

state and its registers are reset to their default values. The configuration, status, and

temperature-reading registers remain in these states until after the first conversion. As

shown in Table 5

this results in:

1. Command register set to 00h.

2. Local Temperature register (LTHB and LTLB) set to 0 癈.

3. Remote Diode Temperature register (RTHB and RTLB) set to 0 癈 until the end of the

first conversion.

4. Status register (SR) set to 00h.

5. Configuration register (CON) set to 00h; interrupt latches are cleared, the ALERT and

T_CRIT output drivers are off and the ALERT

and T_CRIT

pins are pulled HIGH by

the external pull-up resistors.

6. Local T_CRIT temperature setpoints (LCS) and Remote T_CRIT temperature

setpoints (RCS) at 85 癈.

7. Local HIGH setpoint (LHS) and remote HIGH temperature setpoint (RHSHB) at 70 癈.

Table 5.

name

Command byte

POR state

Function

Bits

Access

Read

address

Write

address

LTHB

00h

n/a

0000 0000

local temperature high byte

RTHB

01h

n/a

0000 0000

remote temperature high byte

02h

n/a

0000 0000

status register

CON

03h

09h

0000 0000

configuration register

R/W

04h

0Ah

1000

conversion rate

R/W

LHS

05h

0Bh

0100 0110

local high setpoint

R/W

LLS

06h

0Ch

0000 0000

local low setpoint

R/W

RHSHB

07h

0Dh

0100 0110

remote high setpoint high byte

R/W

RLSHB

08h

0Eh

0000 0000

remote low setpoint high byte

R/W

One Shot

n/a

0Fh

writing register initiates a one-shot conversion 0

RTLB

10h

n/a

0000 00

remote temperature low byte

6 (MSBs) R

RTOHB

11h

0000 0000

remote temperature offset high byte

R/W

RTOLB

12h

000

remote temperature offset low byte

3 (MSBs) R/W

RHSLB

13h

000

remote high setpoint low byte

3 (MSBs) R/W

RLSLB

14h

000

remote low setpoint low byte

3 (MSBs) R/W

RCS

19h

0101 0101

remote T_CRIT setpoint

R/W

LCS

20h

0101 0101

local T_CRIT setpoint

R/W

21h

0 1010

T_CRIT hysteresis

R/W

ATLB

22h

n/a

0000 0000

local temperature low byte

3 (MSBs) R

BFh

Alert mode

R/W

RMID

FEh

n/a

1010 0001

read manufacturers ID

RDR

FFh

n/a

0000 0000

read stepping or die revision

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