7480 datasheet(232/337 Pages) RENESAS

Il numero della parte	7480

Spiegazioni elettronici	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	337 Pages

Scroll/Zoom	100%

Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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232 / 337 page

7480 Group and 7481 Group User's Manual

2-17

APPLICATIONS

Figure 2.2.19 Phase Control Procedure Example

2.2 Timer X and Timer Y

Initialize

RESET(Note 1)

SEI

10 ××

CLI

INT1 interrupt service routine

Change timer Y (Note 3)

RTI

Processing

Set timer Y mode register

TYM(Address 00F716)

Programmable one-shot output mode

Writing to latch only

Timer Y

← Initial value (Note 3)

Port P41 (alternative function of CNTR1) is set to output.

INT1 edge selection bit

← 1 (rising edge detected)

CNTR1 edge selection bit

← 0 (Note 2)

Timer Y count source : f(XIN)/16

Port P41 (alternative function of CNTR1)

← LOW

Notes 1: State after system is released from reset

• Timer Y stop control bit = 0 (count stop)

• Timer Y interrupt enable bit = 0 (disabled)

2: HIGH level one-shot pulse is output.

3: Write to timer Y in order of low-order to high-order byte.

INT1 interrupt request bit

← 0

INT1 interrupt enable bit

← 1

Phase control processing

• Period of feedback signal measured

• Measured value analyzed

(determination of timer Y setting value)

Set timer XY control register

TXYCON(Address 00F816)

Timer Y count start

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