AK7451 Datasheet, PDF (17/32 Pages) Asahi Kasei Microsystems – zero latency angle sensor ic

[AK7451]
 R_ZP Register (Register Address：0x06)
R_ZP
Content
D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
R_ZP[11:0]
Register Function: This register is available for setting arbitrarily angle position as zero position.
Relation between the angle position and the ZP data is the following. The register value is duplicated
from corresponding memory after power on or, when the mode transferred to "Normal Mode" from
“User Mode”.
Zero Point Angle Position
[°]
0
（360÷4096）×1
（360÷4096）×2
（360÷4096）×3
：
（360÷4096）×4095
R_ZP[11:0]
0x000
0x001
0x002
0x003
：
0xFFF
Default
●
Note 12. A setup of this register is reflected in ABZ and UVW output.
 R_RDABZ Register (Register Address：0x07)
R_RDABZ D11 D10 D9
D8
D7
D6 D5 D4
Content
R_RD R_Z_MODE R_ABZ_E R_ABZ_HYS[2:0]
D3 D2 D1 D0
R_ABZ_RES[3:0]
Register Function: This register is used for configuring “Rotation direction”, “Z phase output form”,
“ABZ output enabling / disabling”, “ABZ phase hysteresis” and “ABZ resolution”.
The register value is duplicated from corresponding memory after power on or, when the mode
transferred to "Normal Mode" from “User Mode”.
a) Rotation direction configuration: The output direction can be set in if the angle data increases
clockwise or clockwise (Refer to section 16). Relation between the rotation direction and RD is
as following.
Rotation Direction
R_RD
Default
CCW (+)
0x0
●
CW (-)
0x1
b) Z phase output form configuration: The Z phase can be set as either among two modes.
One is a normal z phase output which carries out toggle at 0 degree position. The other is a
switch output which keeps low state in more than 180 degree and high state in less than 180
degree. (Refer to section 14.3 ABZ output figure)
Z phase output form
R_Z_MODE
Default
Normal output
0x0
●
Switch output
0x1
c) ABZ output enable configuration: It is possible to disable the ABZ output as necessary.
When the ABZ output is set to “inability (0x0)”, the output becomes Hi-Z.
ABZ Output State
R_ABZ_E
Default
ABZ Output Inability
（Hi-Z output）
0x0
ABZ Output
0x1
●
016006637-E-00
- 17 -
2016/05