NXP Semiconductors K32 L2A Series, Reference Manual, Page: 1178 / 1379

channel 0
channel 1
TPM counter
increment/decrement
TPM counter
MOD
0x0000
Time
+1 +1 +1 +1 +1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 -1 -1 -1 -1
-1
-1
-1
Figure 46-29. Quadrature Decoder – Phase Encoding mode
The following figure shows the TPM counter overflow in up counting. In this case, when
the TPM counter changes from MOD to zero, TOF and TOFDIR bits are set. TOF bit
indicates the TPM counter overflow occurred. TOFDIR indicates the counting was up
when the TPM counter overflow occurred.
channel 0
channel 1
TPM counter
increment/decrement
TPM counter
MOD
0x0000
Time
+1 +1 +1 +1 +1 +1 +1
set TOF
set TOFDIR
set TOF
set TOFDIR
+1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1
Figure 46-30. TPM Counter overflow in up counting for Quadrature Decoder mode
The following figure shows the TPM counter overflow in down counting. In this case,
when the TPM counter changes from zero to MOD, TOF bit is set and TOFDIR bit is
cleared. TOF bit indicates the TPM counter overflow occurred. TOFDIR indicates the
counting was down when the TPM counter overflow occurred.
Functional description
K32 L2A Reference Manual, Rev. 2, 01/2020
1178 NXP Semiconductors