SH7052 datasheet(369/919 Pages) RENESAS

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An example of input capture operation is shown in figure 10.16.

In the example in figure 10.16, channel 1 is activated, and input capture operation is performed

with both-edge detection specified for TIO1A, rising-edge detection for TIO1B, and falling-edge

detection for TIO1C.

Pø

TCNT1

Clock

TCNT1

TIO1A–1C

GR1A

GR1B

GR1C

TSR1

IMF1A

TSR1

IMF1B

TSR1

IMF1C

567A

0003

Cleared by software

567E

567D

567C

567B

567A

5679

5678

0005

0004

0003

0002

0001

0000

Figure 10.16 Input Capture Operation

10.3.5

One-Shot Pulse Function

Channel 8 has sixteen down-counters (DCNT8A to DCNT8P) and corresponding external pins

(TO8A to TO8P) which can be used as one-shot pulse output pins.

When a value is set beforehand in DCNT and the corresponding bit in the down-counter start

corresponding external pin. When DCNT reaches H'0000 the down-count stops, the corresponding

bit in the timer status register (TSR) is set, and 0 is output from the external pin. The

corresponding bit in DSTR is cleared automatically. By making the appropriate setting in the

interrupt enable register (TIER), an interrupt request can be sent to the CPU.

An example of one-shot pulse operation is shown in figure 10.17.

In the example in figure 10.17, H'0005 is set in DCNT and a down-count is started.

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