AVH308 APLUS [Aplus Intergrated Circuits], AVH308 Datasheet - Page 3

• Manufacturer Part Number: AVH308
• Description: single-chip voice synthesizing CMOS IC
• Manufacturer: APLUS [Aplus Intergrated Circuits]

(9). PWM1 and PWM2 can directly drive buzzer or 8, 16, 32 or 64 ohms speaker.
(10). The voice_section length of “voice length + mute length” must be the multiple of 80Hex (AVH308 ) or
(11). In voice_section sequence arrangement (00~07), If there are some voice_sections with only mute and
(12). Oscillator selection:
※Input Type Description:
* 10M pull-low option is not available for IO1 input.
10M pull-low Internal 10M ohms weak pull-low, usually for touching trigger.
(C). Busy_Low active : low active signal output during playing.
(D). LED 3Hz flash : 3Hz sink signal output for driving LED during playing at 6kHz sample rate.
(E). LED 6Hz flash : 6Hz sink signal output for driving LED during playing at 6kHz sample rate.
(F). LED dynamic 2/4 : dynamic sink signal output for driving LED during playing.
※ Where (D) and (E) is the LED flash rate at 6kHz sample rate. For different sample rate, the LED flash
1M pull-low
CDS + 1M
without voice, they should be put next to the last voice_section with voice. Besides, that is not allowed to
put a pure mute voice_section between 2 voice_sections with voice, or put the pure mute voice_section
on first place (00).
(A). External oscillator: Connect OSC pin to Vdd with a resistor, Rosc.
(B). Internal oscillator: Connect OSC pin to GND.
100Hex (AV0708 , AV1408 , AV2108 ).
Floating
Option
CDS
rate is different from original 3Hz or 6Hz.
stability)
Normal selection for button trigger.
Only 1M pull-low resistance when key-pressed, and 1M+300K(parallel) pull-low resistance
when key-released.
Internal 300K ohms pull-low resistance, usually for photo-resistor trigger.
Internal 1M ohms pull-low resistance, reserve for some special applications.
No internal resistor connection, usually connected to other output pin or connected to GND
by an external resistor.
Trigger
Trigger
PAD
PAD
Pull-Low
Pull-Low
10M
10M
Pull-Low
Pull-Low
1M
1M
2
(Not suggested because of frequency shift and system
Description
Latch
Latch
300K
300K
Buffer
Buffer
AVxx08 Series
Rev 1.3
2003/9/18