H8S2245 datasheet(379/818 Pages) RENESAS

Part #	H8S2245

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 9 16-Bit Timer Pulse Unit (TPU)

Rev.3.00 Mar. 26, 2007 Page 337 of 772

REJ09B0355-0300

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 9.26 shows an example of phase counting mode 1 operation, and

table 9.8 summarizes the TCNT up/down-count conditions.

TCNT value

Time

Down-count

Up-count

TCLKA (channel 1)

TCLKC (channel 2)

TCLKB (channel 1)

TCLKD (channel 2)

Figure 9.26 Example of Phase Counting Mode 1 Operation

Table 9.8

Up/Down-Count Conditions in Phase Counting Mode 1

TCLKA (Channel 1)

TCLKC (Channel 2)

TCLKB (Channel 1)

TCLKD (Channel 2)

Operation

High level

Low level

High level

Up-count

High level

Low level

High level

Low level

Down-count

Legend:

: Rising edge

: Falling edge

H8S2245 Datasheet(PDF) 379 Page - Renesas Technology Corp