AsahiKASEI AK8975, Manual, Page: 27 / 34

[AK8975/C]
8.3.7. RSV: Reserved
Addr Register name D7 D6 D5 D4 D3 D2 D1 D0
Read-only register
0BH RSV - - - - - - - -
Reset 0 0 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 D1 D0
Write/read register
0CH ASTC - SELF - - - - - -
Reset 0 0 0 0 0 0 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: I
2
C Disable
Addr Register name D7 D6 D5 D4 D3 D2 D1 D0
Write/read register
0FH I2CDIS - - - - - - - I2CDIS
Reset 0 0 0 0 0 0 0 0
This register disables I
2
C bus interface. I
2
C bus interface is enabled in default. To disable I
2
C bus interface,
write “00011011” to I2CDIS register. Then I2CDIS bit turns to “1” and I
2
C bus interface is disabled.
Once I2CDIS is turned to “1” and I
2
C bus interface is disabled, re-setting I2CDIST to “0” is prohibited. To
enable I
2
C bus interface, reset AK8975/C by turning VDD or VID to OFF (0V) once.
MS1187-E-02
- 27 - 2010/05