SPC251A Sunplus Technology Co., Ltd., SPC251A Datasheet - Page 3

• Manufacturer Part Number: SPC251A
• Description: 256KB SOUND CONTROLLER
• Manufacturer: Sunplus Technology Co., Ltd.

256KB SOUND CONTROLLER
1. GENERAL DESCRIPTION
The SPC251A is a CPU based two-channel speech/melody
synthesizer including CMOS 8-bit microprocessor with 69
instructions, 256K-byte ROM for speech and melody data (Speech
is compressed by a 4-bit ADPCM with approx. 85 sec speech
duration @ 6KHz sampling rate) and 128-byte working SRAM. It
includes two Timer/Counters, 24 Software Selectable I/Os, and
two 8-bit current outputs (D/A). For audio processing, melody
and speech can be mixed into one output. It operates over a
wide voltage range of 2.4V - 5.5V. In addition, SPC251A 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.
frequency is 6.0MHz. It has an Instruction Cycle Rate of 2 clock
cycles (min.) - 6 clock cycles (max.). The SPC251A includes, not
only the latest technology, but also the full commitment and
technical support of Sunplus.
2. BLOCK DIAGRAM
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
XO
XI
microprocessor
8-bit
OSC
CLK
IOB7-0
(I/O)
24
256K-byte
PINS
128-byte
SRAM
ROM
GENERAL
IOC7-0
(I/O)
I/O
PORT
Two Timers
INT control
TimeBase
8-bit D/A
(current)
The Max. CPU clock
IOD7-0
(I/O)
Two
AUD1
AUD2
3
3. FEATURES
4. APPLICATION FIELD
! Intelligent education toys
! High end toy controller
! Talking instrument controller
! General speech synthesizer
! Industrial controller
! 8-bit microprocessor
! Provides 256K-byte ROM for program and audio data
! 128-byte working SRAM
! Software-based audio processing
! Wide operating voltage: 2.4V - 3.6V @ 4.0MHz
! Supports Crystal Resonator or Rosc (with Mask option)
! Max. CPU clock: 4.0MHz @ 2.4V - 3.6V
! Standby mode (Clock Stop mode) for power savings.
! 500ns instruction cycle time @ 4.0MHz CPU clock
! Provides 24 general I/Os
! Two 12-bit timer/counters
! 6 INT sources
! Key wake-up function
! Approx. 85 sec speech
! Volume control function
Ex. Pattern to voice (animal, car, color, etc.)
Max. 2µA @ 5.0V
@ 6KHz sampling rate with 4-bit ADPCM
Spelling (English or Chinese)
Math
6.0MHz @ 3.6V - 5.5V
3.6V - 5.5V @ 6.0MHz
SPC251A
SEP. 10, 2001
Version: 1.7