FS5908

Rev. 1.2

16/22

14.2 Control Register (Pointer=01h, Readable and Writable)

Pointer

Name

Type

7

6

5

4

3

2

1

0

h'01

Reg1

R/W

setlowbat rst_alarm set_adco set_arm_cnt<1:0>

arm_inv

int/cmp

shutdown

Reg1<7>=setlowbat:

Low battery warning setup. 0 is 2.4V; 1 is 2.2V.

Reg1<6> (rst_alarm):

When set to 1, alarm, high, low and so on bits and the warning signal of ALARM pin

can be directly cleared; when set to 0, the above signals would be recalculated, and they can be used after

reset the upper and lower bound.

Reg1<5> (set_adco):

see 2.1.

Reg1<4:3> (set_arm_cnt<1:0>):

decide the necessary continuing trigger times to changes ALARM output standard. (Please see 1.5)

Reg1<2> (arm_inv):

Setup ALARM pin output mode. Please see 1.2.1.

Reg1<1> (int/cmp):

0 is comparison mode; 1 is interrupt mode. Please see 1.2.1.

Reg1<0> (shutdown): Stand-by mode. 0 is normal operation; 1 is stand-by mode. Please see 1.3.

14.3 Upper Bound Register (TUpLim, Pointer=02h) and Lower Bound Register (TLowLim,

Pointer=03h) (Readable and Writable)

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

(NC)

+/-

64℃ 32℃ 16℃ 8℃

4℃

2℃

1℃

0.5℃

0.25℃

0.125℃

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

(NC)

+/-

64℃ 32℃ 16℃ 8℃

4℃

2℃

1℃

0.5℃

0.25℃

0.125℃

The default values can be programmed in PROM (PROM6, PROM7, and PROM8) before out of factory. When

power on or produce CS, they will be put in default related registers from PROM. The meanings of bits are the

same as the temperature register (For detail, please see “2.1 Temperature Data Format”). When bit<10>=0, it

means the positive (+), and when bit<10>=1, it means the negative (-).

OTP6 <7:0> ← PROM6 <7:0>

OTP7 <7:0> ← PROM7 <7:0>

OTP8 <7:0> ← PROM8 <7:0>