Renesas SH7641 - Manual (Page 632)

Section 18 Multi-Function Timer Pulse Unit (MTU)
Rev. 4.00 Sep. 14, 2005 Page 582 of 982
REJ09B0023-0400
Example of Phase Counting Mode Setting Procedure: Figure 18.24 shows an example of the
phase counting mode setting procedure.
Phase counting mode
Select phase counting
mode
Start count
[1]
[2]
[1] Select phase counting mode with bits MD3 to
MD0 in TMDR.
[2] Set the CST bit in TSTR to 1 to start the
count operation.
Figure 18.24 Example of Phase Counting Mode Setting Procedure
Examples of Phase Counting Mode Operation: In phase counting mode, TCNT counts up or
down according to the phase difference between two external clocks. There are four modes,
according to the count conditions.
• Phase counting mode 1
Figure 18.25 shows an example of phase counting mode 1 operation, and table 18.33
summarizes the TCNT up/down-count conditions.
TCNT value
Time
TCLKA (channel 1)
TCLKC (channel 2)
TCLKB (channel 1)
TCLKD (channel 2)
Up-count Down-count
Figure 18.25 Example of Phase Counting Mode 1 Operation