ViewTalk™ Family

Part No. W538T8xx
Datasheet W538Txx.pdf
Description The W538T8xx, a member of the ViewTalk™ family, is an 8-bit microprocessor (uP) with a speech and melody synthesizer and 64 seg x 32 com LCD driver unit, which includes an internal regulator, pump circuit and two pages of dedicated LCD RAM. The W538T8xx can synthesize 8 channels of melody or speech (up to 2 of these channels can be speech; the rest are melody) and drive an LCD display simultaneously. The W538T8xx accepts midi scores in MIDI format 0, and it has multiple power modes to minimize power dissipation, based on different speech, melody, and LCD needs. The Serial-memory Interface Manager (SIM) is designated for cartridge applications. Using the SIM, the W538T8xx can access Nuvoton-proprietary, serial-memory chips W55Fxx and W551Cxxx. It is also ideal for games, remote controllers, watches, clocks and other applications that incorporate both LCD display and speech or midi.
Features
  • High performance 8-bit uP able to synthesize speech, melody and to draw pictures, the Minimum operating voltage (The minimum operating voltage deviation is 0.2V.):
    • 4MHz @ 2.4V
    • 5MHz @ 2.7V
    • 6MHz @ 2.9V
    • 8MHz @ 3.2V
    • 10MHz @ 3.6V
  • Two System clocks, main-clock and sub-clock, both configurable
    • The Main-clock can be X’tal or ring type (based on pin option)
    • The Sub-clock (32768Hz) can be X’tal or RC type (based on mask option)
  • Sophisticated power management methodology: SLOW, HOLD and STOP modes
  • Single ROM architecture to store program, user data/table, speech, timbre, score and picture
  • 1 KB of Working RAM (W-RAM) for complicated application
  • Dual-page, 2 x 256 bytes LCD RAM (L-RAM) for smooth animation
  • LCD driver unit
    • 64 SEGs X 32 COMs
    • 1/4 or 1/5 bias and 1/16 or 1/32 duty cycle
    • Built-in LCD regulator for stable display quality while speech or melody is playing
    • Built-in drawing operators, such as PUT, INV, AND, OR, XOR, etc., to simplify programming
  • 24 I/O pins (BP0 ~ 2) and 8 of them can sinking 8mA
    • 8 I/O pins can sink 8mA
    • Some LCD SEGMENT pins can be used as additional input or output pins
  • 8 channels of simultaneous speech and melody synthesis
    • Unlimited kinds of instruments with pre-stored waveforms
    • Speech synthesis at programmable playback rates
    • 1-channel speech + 7-channel Wavetable
    • 1-channel voice-melody + 7-channel Wavetable
    • 1-channel speech + 1-channel percussion + 6-channel Wavetable
  • Speaker driver
    • DAC current type: maximum output 3mA / 5mA (register option), 10 bit resolution
    • PWM direct drive: maximum 128 KHz sampling rate @ 8MHz system clock
  • Automatic IR-carrier generation for interactive applications
  • Low battery detector (LVD) for battery-life management application
  • Low Voltage Reset (LVR)
  • Serial-Memory Interface Manager (SIM) to interface with cartridge applications

Built-in Watch-Dog Timer (WDT) that is activated by mask option only

Diagram N/A
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Development Tools ICE
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Contact us: MicroC-PS@nuvoton.com