r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 377
r5f71374an80fpv
Manufacturer Part Number
r5f71374an80fpv
Description
32-bit Risc Microcomputer Superh?? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F71374AN80FPV.pdf
(1154 pages)
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10.4.6
In phase counting mode, the phase difference between two external clock inputs is detected and
TCNT is incremented/decremented accordingly. This mode can be set for channels 1 and 2.
When phase counting mode is set, an external clock is selected as the counter input clock and
TCNT operates as an up/down-counter regardless of the setting of bits TPSC0 to TPSC2 and bits
CKEG0 and CKEG1 in TCR. However, the functions of bits CCLR0 and CCLR1 in TCR, and of
TIOR, TIER, and TGR, are valid, and input capture/compare match and interrupt functions can be
used.
This can be used for two-phase encoder pulse input.
If overflow occurs when TCNT is counting up, the TCFV flag in TSR is set; if underflow occurs
when TCNT is counting down, the TCFU flag is set.
The TCFD bit in TSR is the count direction flag. Reading the TCFD flag reveals whether TCNT is
counting up or down.
Table 10.47 shows the correspondence between external clock pins and channels.
Table 10.47 Phase Counting Mode Clock Input Pins
Example of Phase Counting Mode Setting Procedure: Figure 10.29 shows an example of the
phase counting mode setting procedure.
Channels
When channel 1 is set to phase counting mode
When channel 2 is set to phase counting mode
Phase Counting Mode
Figure 10.29 Example of Phase Counting Mode Setting Procedure
<Phase counting mode>
Select phase counting
Phase counting mode
Start count
mode
[1]
[2]
[1] Select phase counting mode with bits
[2] Set the CST bit in TSTR to 1 to start
Section 10 Multi-Function Timer Pulse Unit 2 (MTU2)
MD3 to MD0 in TMDR.
the count operation.
A-Phase
TCLKA
TCLKC
Rev. 1.00 Sep. 21, 2007 Page 351 of 1124
External Clock Pins
B-Phase
TCLKB
TCLKD
REJ09B0402-0100
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