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SPC21A1 Datasheet

  • SPC21A1

  • 20KB SOUND CONTROLLER

  • 126.91KB

  • 12頁(yè)

  • ETC

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SPC21A1
20KB SOUND CONTROLLER
GENERAL DESCRIPTION
The SPC21A1 is a CPU based two-channel speech/melody synthesizer including CMOS 8-bit microprocessor
with 69 instructions, 20K-byte ROM for speech and melody data (Speech is compressed by a 4-bit ADPCM with
approx. 6 sec speech duration @ 7KHz sampling rate) and 64-byte working SRAM.
It includes two
Timer/Counters, 10 Software Selectable I/Os, and one 8-bit current D/A output. For audio processing, melody
and speech can be mixed into one output.
It operates over a wide voltage range of 2.4V - 5.5V and includes
Low Voltage Reset function. The Low Voltage Reset automatically resets when the working voltage is less than
2.2V. In addition, SPC21A1 has a Clock Stop mode for power savings. The power savings mode saves the
RAM contents, but freezes the oscillator, causing all other chip functions to be inoperative. The Max. CPU
clock frequency is
6.0MHz.
It has an Instruction Cycle Rate of 2 clock cycles (min.) 鈥?6 clock cycles (max.).
The SPC21A1 includes, not only the latest technology, but also the full commitment and technical support of
Sunplus.
FEATURES
8-bit microprocessor
Provides 20K-byte ROM for program and
audio data
64-byte working SRAM
Software-based audio processing
Wide operating voltage: 2.4V 鈥?3.4V @ 4.0MHz
3.6V 鈥?5.5V @ 6.0MHz
Supports Rosc only
Max. CPU clock: 4.0MHz @ 3V, 6.0MHz @ 5V
Standby mode (Clock Stop mode) for power
Savings. Max. 2 A @ 5V
500ns instruction cycle time @ 4.0MHz CPU clock
Provides 10 general I/Os
Two 12-bit timer/counters
6 INT sources
Key wake -up function
Approx. 6 sec speech
@ 7KHz sampling rate with ADPCM
One D/A output
Low Voltage Reset
BLOCK DIAGRAM
8-bit
microprocessor
20K-byte
ROM
Two Timers
TimeBase
INT control
64-byte
SRAM
One
8-bit D/A
(current)
XI
CLK
OSC
Low
Voltage
Reset
AUD
10
PINS
GENERAL
I/O
PORT
IOD5-0
(I/O)
IOC3-0
(I/O)
APPLICATION FIELD
Intelligent education toys
Ex. Pattern to voice (animal, car, color, etc.)
Spelling (English or Chinese)
Math
High end toy controller
Talking instrument controller
General speech synthesizer
Industrial controller
Sunplus Technology Co., Ltd.
1
Rev.: 1.1
1999.11.19

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