W528SXX

Publication Release Date: Nov 2000

- 11 -

Revision A1

b.

Level-Hold Trigger Mode

0:

LD EN, 0x11

; Enable TG1 rising/falling edge input.

H4 + sound1 + T4

JP 0

; Repeat sound1 until TG1 key released.

4:

END

; As soon as TG1 key is released, execute this group entry.

The timing diagram is shown below:

TG1:

AUD:

Stop Immediately

Sound 1

case 1:

case 2:

TG1:

AUD:

Stop Immediately

c.

Complete-Cycle Level Hold

0:

LD EN, 0x01

; Enable TG1 falling edge only.

H4 + sound1 + T4

JP 0 @TG1_LOW

; If TG1 status is low level voltage (trigger is pressed), then j ump

to 0;

if not, execute next instruction (END).

END

The timing diagram is shown below:

AUD:

TG1:

Sound 1

case 1:

case 2:

TG1:

AUD:

Sound 1

Sound 1

d.

Single-Cycle Level Hold

0:

LD EN, 0x11

; Enable both falling and rising edge input of TG1.

H4 + sound1 + T4

END

•

•

•

4:

END

; As soon as TG1 is key released, execute this group entry.