SA56004X_5

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 05 — 22 May 2008

10 of 36

NXP Semiconductors

SA56004X

Digital temperature sensor with overtemperature alarms

7.8.5 Conversion rate register (CR)

The conversion rate register is used to store programmable conversion data, which

defines the time interval between conversions in the standard free-running auto convert

mode. Table 9 shows all applicable data values and rates for the SA56004X. Only the

4 LSBs of the register are used and the other bits are reserved for future use. The register

is R/W using the read address 04h and write address 0Ah. The POR default conversion

data is 08h.

7.8.6 Temperature limit registers

[1]

POR default LHS = RHSHV = 46h (70

°C).

[2]

POR default RHSLB = 00h.

[1]

POR default LLS = RLSHV = 00h.

[2]

POR default RLSLB = 00h (0

°C).

[1]

POR default LCS = RCS = 55h (85

°C).

Table 9.

Conversion rate control byte (CR)

Data value

Conversion rate (Hz)

00h

0.06

01h

0.12

02h

0.25

03h

0.50

04h

1.0

05h

2

06h

4

07h

8

08h

16

09h

32

0Ah to FFh

n/a

Table 10.

LHS, RHSHB, RHSLB - Local and remote HIGH setpoint registers

Byte

High byte (read only address 05h, 07h;

write address 0Bh, 0Dh)[1]

Low byte (read/write address 13h)[2]

Bit

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

Value

sign

64

32

16

8421

0.5

0.25

0.125

00000

Table 11.

LLS, RLSHB, RLSLB - Local and remote LOW setpoint registers

Byte

High byte (read address 06h, 08h;

write address 0Ch, 0Eh)[1]

Low byte (read/write address 14h)[2]

Bit

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

Value

sign

64

32

16

8421

0.5

0.25

0.125

00000

Table 12.

LCS, RCS - Local and remote T_CRIT registers

Byte

Single high byte (read/write address 20h, 19h)[1]

Bit

D7

D6

D5

D4

D3

D2

D1

D0

Value

sign

64

32

16

8

4

2

1