Table 29. Counting Direction And Encoding Signals; Figure 48. Both Ti0 And Ti1 Quadrature Decoder Counting - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230

Table 29. Counting Direction and Encoding Signals

Counting mode
Counting on TI0 only
(SMSEL = 0x01)
Counting on TI1 only
(SMSEL = 0x02)
Counting on TI0 and TI1
(SMSEL = 0x03)
TI0
TI1
Up
Down

Figure 48. Both TI0 and TI1 Quadrature Decoder Counting

Rev. 1.10
TI0S0
Level
Rising
TI1S1 = High Down
TI1S1 = Low Up
TI0S0 = High —
TI0S0 = Low —
TI1S1 = High Down
TI1S1 = Low Up
TI0S0 = High X
TI0S0 = Low X
Note: "—" → means "no counting"; "X" → impossible
192 of 366
TI1S1
Falling Rising
Up —
Down —
— Up
— Down
Up X
Down X
X Up
X Down
Quadrature Decoder Counting on
Both TI0 & TI1
(CH0P = 0, CH1P = 0)
November 09, 2018
Falling
—
—
Down
Up
X
X
Down
Up