AK8996 Datasheet, PDF (64/74 Pages) Asahi Kasei Microsystems – Pressure Sensor Interface IC

[AK8996/W]
l) OSC frequency adjustment (Register name: OSC)
Register for adjusting the AK8996 operation clock. Perform an adjustment to attain a frequency of
1.024kHz. Frequency ∆f in the table below indicates a value varying with the setup values of the
register. The ratio is benchmarked to 1.024kHz (OSC ideal value) as 100%
(Ratio = Frequency ∆f/1024[kHz]*100[%]).
Address: 14 hex D[3:0]=EFR[3:0]
EFR[3:0]
Ratio
Dec Hex
Bin
(%)
-4
C
1100
80
-3
D
1101
85
-2
E
1110
90
-1
F
1111
95
0
0
0000
100
1
1
0001
105
2
2
0010
110
3
3
0011
115
4
4
0100
120
Note 1) Hex 5 to B are unavailable.
Frequency ∆f
(kHz)
-204.8
-153.6
-102.4
-51.2
0
+51.2
+102.4
+153.6
+204.8
Comments
Default
m) VTMP voltage adjustment (Register name: VTMP)
Compensates the offset values for the AK8996's internal temperature sensor. Adjusts the values so
that the difference between VTMP voltage and VREF voltage is close to 0 mV (If VREF is 1005mV,
adjust so that VTMP is also 1005mV).
∆VTMP in the table below indicates a value varying with the setup values of the register. The ratio is
benchmarked to 1000mV (VREF ideal value) as 100% (Ratio = ∆VTMP/1000[mV]*100[%]).
Address: 15 hex D[5:0]=ETM[5:0]
ETM[5:0]
Dec Hex
Bin
-32 20 100000
…..
-16 32 110000
…..
-8
38
111000
…..
-4
3C 111100
…..
-1
3F 111111
0
00 000000
1
01 000001
…..
4
04 000100
…..
8
08 001000
…..
16
10
010000
…..
31
1F
011111
Ratio
(%)
-6.4
-3.2
-1.6
-0.8
-0.2
0.0
+0.2
+0.8
+1.6
+3.2
+6.2
∆VTMP
(mV)
-64
-32
-16
-8
-2
0
+2
+8
+16
+32
+62
Comments
Default
MS1055-E-02
64
2011/12