SH7641 Datasheet, PDF (632/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

Section 18 Multi-Function Timer Pulse Unit (MTU)
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
[1]
mode
Start count
[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.
<Phase counting mode>
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.
TCLKA (channel 1)
TCLKC (channel 2)
TCLKB (channel 1)
TCLKD (channel 2)
TCNT value
Up-count
Down-count
Time
Figure 18.25 Example of Phase Counting Mode 1 Operation
Rev. 4.00 Sep. 14, 2005 Page 582 of 982
REJ09B0023-0400