IC-TW28 Datasheet, PDF (44/80 Pages) IC-Haus GmbH – 10-BIT SIN/COS INTERPOLATOR

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Rev D2, Page 44/80
ZPHASE
ZPHASE is a dynamic register containing the most sig-
nificant byte of the Z output phase (Z output location
within an input cycle).
Value
0 – 255
ZPHASE.msb (0x010A)
Description
Z phase MSB (ZPHASE [9:2])
Table 67: Z Phase MSB
UVWPH
UVWPH is a static register containing the most signifi-
cant byte of the UVW output phase shift relative to the
sin/cos input cycle.
The actual UVW phase, uvwph, in sin/cos input cycle
degrees, is calculated as
uvwph[^◦] = uvwph × ^360◦
1024
S_ADC
S_ADC is a dynamic register containing the MSB of the
12-bit sin channel ADC value.
Value
0 – 255
S_ADC (0x021A)
Description
Min. – max. sin ADC value
Table 71: Sin ADC Value
Value
0 – 255
UVWPH.msb (0x010B)
Description
UVW phase MSB (UVWPH [9:2])
Table 68: UVW Phase MSB
This value can be read using the Encoder Link inter-
face to check the rough value of the sin channel ADC
for diagnostic purposes. The full 12-bit ADC value is
available using the SPI interface. See Sin, Cos, and
Zero ADC Read on page 33 for more information.
PHASE_LSB
PHASE_LSB is a static register containing the least
significant bits of the Z and UVW phase.
Value
0–3
PHASE_LSB.z (0x010C Bits 1:0)
Description
Z phase LS bits (ZPHASE [1:0])
Table 69: Z Phase LSB
C_ADC
C_ADC is a dynamic register containing the MSB of the
12-bit cos channel ADC value.
Value
0 – 255
C_ADC (0x021C)
Description
Min. – max. cos ADC value
Table 72: Cos ADC Value
The Z output phase, ZPH, is calculated as
ZPH = 4 × ZPHASE.msb + PHASE_LSB.z
This value can be read using the Encoder Link inter-
face to check the rough value of the cos channel ADC
for diagnostic purposes. The full 12-bit ADC value is
available using the SPI interface. See Sin, Cos, and
Zero ADC Read on page 33 for more information.
The actual Z channel phase, zphase, in sin/cos input
cycle degrees, is calculated as
zphase[^◦] = ZPH × ^360◦
1024
If Z auto calibration is used, ZPH is tuned by the
iC-TW28 during auto calibration.
Value
0–3
PHASE_LSB.uvw (0x010C Bits 3:2)
Description
UVW phase LS bits (UVWPH [1:0])
Table 70: UVW Phase LSB
The UVW phase shift, UVWPS, is calculated as
UVWPS = 4 × UVWPH.msb + PHASE_LSB.uvw