HT812L0
2.8 Second Enhanced Tone Voice
Features
• Operating voltage: 2.4V~5.0V
• Low standby current (1µA Typ.)
• Voice/sound effect/simple melody output
• 2.8-second voice capacity
• 32 tone sections
• 16 words for each tone section
• Current type D/A output
• Mask options
– Pull-high resistor: 20kΩ/50kΩ/100kΩ
– KEY1: Direct or sequential/random key
– Trigger mode: Retriggerable/Non-retrig-
gerable
– KEY1 play normal mode or twin mode
Normal mode: one group for KEY1
Applications
• Toys
• Alarm clocks
• Public address system
General Description
The HT812L0 is a single chip PCM voice and
sound effect synthesizer. It provides 2.8 seconds
of voice capacity at a 6kHz sampling rate
(FSR=6kHz) and 32 sections of sound ef-
fects/simple melodies. A maximum of 8 keys or
4×4 MATRIX are available. Of the 8 keys or 4×4
Pin Assignment
Twin mode: Two groups for KEY1
– 8 direct key or 4×4 MATRIX keys
– Two-page trigger
– Key debounce time: 22ms/45ms
– Trigger function:
Level hold/one shot/level trigger
– FLAG1, FLAG2 outputs:
3Hz/sound level/busy/6Hz/endp
– Melody/tone decay time:
2 sec/1 sec/0.5 sec/0.25 sec
– Four kinds of envelope shapes for melody
• Tone shape: tone+2kHz/noise/tone/silence
• Tempo: 16ms/section~1 sec/section
• Dice form or 16-pin DIP
• Alert & warning system
• Sound effect generators
• Voice interface products
MATRIX, KEY1 can be optioned as a direct or
sequential/random key, so that it can play an
interlaced voice/sound effect/simple melody and
generate various special sound effects for toys
and sound effect generator applications.
1
5th May ’98