AK8975 Datasheet, PDF (27/34 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

8.3.7. RSV: Reserved
Addr Register name D7
D6
D5
D4
D3
D2
Read-only register
0BH
RSV
Reset
-
-
-
-
-
-
0
0
0
0
0
0


RSV register is reserved. Do not use this register.
8.3.8. ASTC: Self Test Control
Addr Register name D7
D6
D5
D4
D3
D2
Write/read register
0CH
ASTC
-
SELF
-
-
-
-
Reset
0
0
0
0
0
0
[AK8975/C]
D1
D0
-
-
0
0
D1
D0
-
-
0
0
SELF: Self test control
"0": Normal
"1": Generate magnetic field for self-test
Do not write “1” to any bit other than SELF bit in ASTC register. If “1” is written to any bit other than SELF
bit, normal measurement can not be done.
8.3.9. TS1, TS2: Test 1, 2
Addr Register name D7
D6
D5
D4
D3
D2
D1
D0
Write/read register
0DH
TS1
0EH
TS2
Reset
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
TS1 and TS2 registers are test registers for shipment test. Do not use these registers.
8.3.10.
I2CDIS: I²C Disable
Addr Register name D7
D6
Write/read register
0FH
I2CDIS
-
-
Reset
0
0
D5
D4
D3
D2
D1
D0
-
-
-
-
- I2CDIS
0
0
0
0
0
0
This register disables I²C bus interface. I²C bus interface is enabled in default. To disable I²C bus interface,
write “00011011” to I2CDIS register. Then I2CDIS bit turns to “1” and I²C bus interface is disabled.
Once I2CDIS is turned to “1” and I²C bus interface is disabled, re-setting I2CDIST to “0” is prohibited. To
enable I²C bus interface, reset AK8975/C by turning VDD or VID to OFF (0V) once.
MS1187-E-02
- 27 -
2010/05