HT81003_02 データシートの表示（PDF） - Holtek Semiconductor
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HT81003_02 Datasheet PDF : 8 Pages
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HT81003
¨ End-pulse output
When the voice output is completed, the FLAG1 pin
outputs an active low pulse. The pulse width can be
programmed depending on the customer¢s require-
ments.
The FLAG1 as well as FLAG2 pins are both floating
outputs when the chip is in the standby state.
AUD
.LA G
: . lo a tin g
Volume control
The function of the volume control can be set by mask
option. A code is written in the function table for the pur-
pose of controlling the volume of each section output af-
ter the volume control function is chosen. There are two
volume options, namely; full range and half range.
Application Circuits
0 .1 m .
V DD
KEY2
KEY1
R O SC
VDD
S peaker
I/O 1
O U T1
KEY1
O SCI
H T81003
VSS
O U T2
8 W /1 6 W /3 2 W
I/O 2
200W
S peaker
8W
8050
I/O2
The I/O2 pin is a PWM structure. It outputs voice signals
to drive a speaker through an external NPN transistor
when the chip is active. The OUT1 and OUT2 pins are
configured as PWM structure which can drive 8/16/32W
speaker directly.
An 8050 type transistor with hFE@150 is recommended
for an output driver.
O SC I O U T1
R O SC
SPK
O U T2
H T81003
V DD
SPK
O S C I I/O 2
R O SC
H T81003
0 .1 m .
V DD
KEY2
KEY1
R O SC
VDD
200W 200W
S peaker
I/O 1
O U T1
LE D 1 LE D 2
8W
KEY1 H T 81003 O UT2
O SCI
VSS
I/O 2
8050
200W
0 .1 m .
V DD
KEY2
KEY1
R O SC
LE D 1
VDD
S peaker
I/O 1
O U T1
KEY1
O SCI
H T81003
VSS
O U T2
8 W /1 6 W /3 2 W
I/O 2
200W
0 .1 m .
V DD
KEY1
VDD
200W 200W
KEY1
S peaker
O U T1
LE D 1 LE D 2
H T 81003 O UT2
8 W /1 6 W /3 2 W
R O SC
O SCI
I/O 2
200W
V S S I/O 1
V DD
0 .1 m . 2 0 0 W
LE D 1
KEY1
R O SC
I/O 1
KEY1
O SCI
VDD
H T81003
VSS
S peaker
O U T1
O U T2
8 W /1 6 W /3 2 W
I/O 2
200W
S peaker
8W
8050
0 .1 m .
V DD
KEY2
KEY1
R O SC
VDD
S peaker
I/O 1
O U T1
KEY1
O SCI
H T81003
O U T2
8 W /1 6 W /3 2 W
I/O 2
T o n e in
VSS
Rev. 1.10
7
January 22, 2002
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