IC-MH8_14 Datasheet, PDF (21/25 Pages) IC-Haus GmbH – 12 BIT ANGULAR HALL ENCODER

iC-MH8
12 BIT ANGULAR HALL ENCODER
Output Drivers
preliminary
Rev A1, Page 21/25
Six RS422-compatible output drivers are available,
which can be configured for the incremental signals
and commutation signals. The following table on the
CFGO register bits provides an overview of the possi-
ble settings.
CFGO(1:0)
00
01
10
11
Addr. 0x05; bit 5:4
Incremental Diff ABZ (U=NA, V=NB, W=NZ)
Incr ABZ + Comm UVW
Commutation Diff UVW (A=NU, B=NV, Z=NW)
Incr. ABZ + AB4 (U=A4, V=B4, W=0)
Table 24: Configuration of output drivers
In the differential incremental mode (CFGO = ’00’, Fig-
ure 20), quadrature signals are available on the Pins
A, B and Z. The respective inverted quadrature sig-
nals are available on the pins U, V and W. As a result,
lines can be connected directly to the module. Another
configuration of the incremental signals is specified in
the section "Sine/Digital Converter".
With CFGO = ’01’ (Figure 21) the ABZ incremental sig-
nals and the UVW commutation signals are available
on the six pins. As long as the current angular posi-
tion is not yet available during the start-up phase, all
commutation signals are at the low level.
CFGO 0 _A
CFGRES 7
CFGDIR 0 ^B
Z
U
V
W
PCOS
PSIN
Figure 20: ABZ differential incremental signals
CFGO 1 _A
CFGRES 7
CFGDIR 0 ^B
CFGPOLE 0 _Z
U
V
W
PCOS
PSIN
Figure 21: ABZ and UVW single ended signals
CFGO 2 _A
CFGRES 7
CFGDIR 0 ^B
CFGPOLE 0 _Z
U
V
W
PCOS
PSIN
With CFGO = ’10’, the third mode (Figure 22) is avail-
able for transferring the commutation signals via a dif-
ferential line. The non-inverted signals are on the pins
U, V and W, the inverted signals on A, B and Z.
The ABZ quadrature signals with an adjustable higher
resolution and quadrature signals with one period per
rotation are available in the fourth mode (Figure 23).
Four segments can be differentiated with the pins U
and V. This information can be used for an external
period counter which counts the number of scanned
complete rotations.
Figure 22: UVW differential commutation signals
CFGO 3 _A
CFGRES 7
CFGDIR 0 ^B
Z
U
V
W
PCOS
PSIN
Figure 23: ABZ incremental signals / period counter