AK7451 Datasheet, PDF (20/32 Pages) Asahi Kasei Microsystems – zero latency angle sensor ic

[AK7451]
 R_UVW Register (Register Address : 0x0A)
R_UVW
Content
D11 D10 D9 D8 D7
D6
D5 D4 D3 D2 D1 D0
R_UVW_E R_UVW_HYS[2:0] R_UVW_RES[2:0]
Register Function: This register is used for configuring “UVW output enabling / disabling”, “UVW
phase hysteresis”, “the number of UVW pulses per a rotation”.
The register value is duplicated from corresponding memory after power on or, when the mode
transferred to "Normal Mode" from “User Mode”.
a) UVW output enable configuration: It is possible to disable the UVW output as necessary.
When the ABZ output is set to “inability (0x0)”, the output becomes Hi-Z.
UVW Output State
R_UVW_E
Default
UVW output Inability
0x0
(Hi-Z output)
UVW output
0x1
●
b) UVW hysteresis configuration: This configuration can be used to prevent unexpected UVW
pulses under noise influence. Relation between UVW hysteresis and UVW_HYS set value is as
following.
UVW Hysteresis
R_UVW_HYS[2:0]
Default
Invalid
0x0
0LSB
0x1
1LSB
0x2, 0x5, 0x6, 0x7
●
2LSB
0x3
3LSB
0x4
c) The number of UVW pulses configuration: It is possible to set the number of UVW pulses per
a rotation by changing following bits according to the number of DCBL motor rotor’s magnetic
poles.
The number of
R_UVW_RES[2:0]
Default
UVW pulses
1ppr
0x0
2ppr
0x1
3ppr
0x2
●
4ppr
0x3
5ppr
0x4
6ppr
0x5
7ppr
0x6
8ppr
0x7
016006637-E-00
- 20 -
2016/05