King Billion Electronics Co., Ltd

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HE83005

HE80000 SERIES

July 28, 2003

11

V3.4

This specification is subject to change without notice. Please contact sales person for the latest version before use.

VO/DAO

2.5

3

mA

CPU

bias &

filter

circuit

VDD

VO(DAO)

SPEAKER

The PWM output volume can be adjusted by command register PWMC[6..4]. The PWMC[6] and

PWMC[5] control 2 time driver, while PWMC [4] controls 1 time driver, thus it has maximum 5 levels of

driver output. The sound volume of PWM output can be controlled by these PWMC[6..4] bits. Please

note that this adjustment only apply to PWM. When the system enters into sleep mode or idle mode, it

will automatically disable all voice outputs by clearing VOC[6..0] to ”0000000”. To activate voice

output again when returning to normal mode, the VOC register needs to be set again.

PWMC[6..4] Number of PWM Output Driver

000

off

001

1

010

2

011

3

100

2

101

3

110

4

111

5