7480 datasheet(231/337 Pages) RENESAS

231 / 337 page

7480 Group and 7481 Group User's Manual

2-16

APPLICATIONS

2.2.7 Application Example of Programmable One-Shot Output Mode

Phase Control of Load (Output of Phase Control Signals)

POINT: The phase control signal to the load is output using the programmable one-shot output mode

of a 16-bit timer.

SPECIFICATIONS:

Clock: f(XIN) = 8 MHz

The phase control signal to the load is output from the CNTR1 pin using the

programmable one-shot output mode of timer Y.

• Count source: f(XIN)/16

• Rising edges of the signal input to the INT1 pin from the trigger detection

circuit are detected.

• A triac is turned on at the HIGH level.

The period of the feedback signal input from the load is measured, analyzed,

and used to adjust the phase control signal.

For the measurement of the period of the feedback signal, refer to Section 2.2.4 Application

Example of Pulse Period Measurement Mode.

Figure 2.2.17 shows a peripheral circuit example.

Figure 2.2.18 shows an operation timing example.

Figure 2.2.19 shows a phase control procedure example.

Figure 2.2.18 Operation Timing Example

2.2 Timer X and Timer Y

INT1 pin input

VAC power supply

CNTR1 pin output

Writing to latch in

timer Y interrupt

service routine

000016

Figure 2.2.17 Peripheral Circuit Example

7480 Group

7481 Group

P31/INT1

P41/CNTR1

VAC

Trigger detection

circuit

Port

Feedback signal

Phase control signal

Load

7480 Datasheet(PDF) 231 Page - Renesas Technology Corp

7480 Datasheet(HTML) 231 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL