
346
Phase Count Mode 4: Figure 12.33 shows an example of phase counting mode 4 operation. Table
12.12 lists the up counting and down counting conditions for the TCNT.
Increment
Decrement
TCLKA (Channel 1)
TCLKC (Channel 2)
TCLKB (Channel 1)
TCLKD (Channel 2)
TCNT value
Time
Figure 12.33 Phase Counting Mode 4 Operation
Table 12.12 Phase Count Mode 4 Up/Down Counting Conditions
TCLKA (Channel 1)
TCLKC (Channel 2)
TCLKB (Channel 1)
TCLKD (Channel 2)
Operation
1 (high level)
Rising edge
Increment
0 (low level)
Falling edge
Rising edge
0 (low level)
Does not count (don’t care)
Falling edge
1 (high level)
1 (high level)
Falling edge
Decrement
0 (low level)
Rising edge
Rising edge
1 (high level)
Does not count (don’t care)
Falling edge
0 (low level)
Phase Counting Mode Application Example: Figure 12.34 shows an example where channel 1
is set to phase counting mode and is teamed with channel 0 to input a two-phase encoder pulse for
a servo motor to accurately detect position and speed.
Channel 1 is set to phase counting mode 1, and the encoder pulse A phase and B phase are input to
the TCLKA and TCLKB pins.
Channel 0 is set so that the TCNT counter is cleared on a TGR0C register compare-match, and the
TGR0A and TGR0C registers are used with the compare-match function to establish the speed
control and position control periods. The TGR0B register is used with the input capture function,
and the TGR0B and TGR0D registers are employed for buffer operation. The channel 1 counter
Summary of Contents for SH7041 Series
Page 2: ......
Page 6: ......
Page 38: ...xvi ...
Page 44: ...6 ...
Page 46: ...8 ...
Page 48: ...10 ...
Page 82: ...44 ...
Page 114: ...76 ...
Page 118: ...80 ...
Page 124: ...86 ...
Page 170: ...132 ...
Page 250: ...212 ...
Page 492: ...454 ...
Page 506: ...468 ...
Page 604: ...566 ...
Page 684: ...646 ...
Page 706: ...668 ...
Page 778: ...740 ...
Page 780: ...742 ...
Page 818: ...780 ...
Page 850: ...812 ...
Page 923: ...SH7040 SH7041 SH7042 SH7043 SH7044 SH7045 Group Hardware Manual REJ09B0044 0600O ...