AK7451 Datasheet, PDF (22/32 Pages) Asahi Kasei Microsystems – zero latency angle sensor ic

[AK7451]
 E_ZP Memory (Memory Address：0x06)
E_ZP
Content
D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
E_ZP[11:0]
Memory Function: This memory is available for setting arbitrarily angle position as zero position.
Relation between the angle position and the ZP data is the following.
Zero Point Angle
Position [°]
0
（360÷4096）×1
（360÷4096）×2
（360÷4096）×3
：
（360÷4096）×4095
E_ZP[11:0]
0x000
0x001
0x002
0x003
：
0xFFF
Default
●
Note 16. A setup of this register and memory is reflected in ABZ and UVW output.
 E_RDABZ Memory (Memory Address：0x07)
E_RDABZ D11 D10 D9
D8
D7
D6 D5 D4 D3 D2 D1 D0
Content
E_RD E_Z_MODE E_ABZ_E E_ABZ_HYS[2:0] E_ABZ_RES[3:0]
Memory Function: This register is used for configuring “Rotation direction”, “Z phase output form”,
“ABZ output enabling / disabling”, “ABZ phase hysteresis” and “ABZ resolution”.
Relation between each bit and setting value is as following.
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
E_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)
Z phase output form
E_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
E_ABZ_E
Default
ABZ Output Inability
（Hi-Z output）
0x0
ABZ Output
0x1
●
016006637-E-00
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2016/05