AK8999AD Datasheet, PDF (61/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC

CONFIDENTIAL
[AK8999A/AW/AD]
m) OSC frequency adjustment (EEPROM name: OSC)
This EEPROM is used for adjusting the AK8999A operation clock. Perform an adjustment to attain a
frequency of 1000kHz. Reading the ratio data from the OSC variable ratio storing register (Register
name: CM2), the adjustment data of the OSC frequency adjustment EERPOM is calculated.
Frequency Δf in the table below indicates a value varying with the setup values of the EEPROM. The
ratio is benchmarked to 1000kHz (OSC ideal value) as 100%
(Ratio = Frequency Δf/( Frequency Δf+1000[kHz])*100[%]).
Address : 10 hex D[3:0] = EFR[3:0]
EFR[3:0]
Ratio FrequencyΔf
Dec Hex
Bin
(%)
(kHz)
-5
B
1011
-34
-251
-4
C
1100
-25
-197
-3
D
1101
-17
-146
-2
E
1110
-11
-99
-1
F
1111
-5
-52
0
0
0000
0
0
1
1
0001
5
49
2
2
0010
10
106
3
3
0011
14
162
4
4
0100
18
224
5
5
0101
22
274
6
6
0110
25
329
7
7
0111
28
384
Note) Hex 8 to A are prohibited for setup.
Description
Default
MS1600-E-00
- 61 -
2014/05