W83791SD Datasheet, PDF (4/22 Pages) Winbond – H/W MONITORING IC

W83791SD/W83791SG
1. GENERAL DESCRIPTION
W83791SD/SG is a programmable speech synthesizer with 9-bit current DAC output that can connect
to speaker or LINE_OUT by the AC’97 audio codec. It supports 1 CPU present or absent event trap, 5
external event traps, and 127 internal programmable event traps to trigger maximum 133 different
speech output. If more than two events happen simultaneously, the priority set is: SLOTOCC# >
EVNTRP1 > EVNTRP2 > EVNTRP3 > EVNTRP4 > EVNTRP5 > 127 Programmable events (Bank0
index 09h).
For the application of error messages from BIOS, 127 Programmable events are enabled with a watch
dog timer. The time interval is programmable and events will be triggered when time out.
External flash memory interface with Winbond W55FXX is flexible to change warning voice message
and support on-line programming flash data through I²C^TM interface. An external resistor is added to
provide ring oscillator.
Through the application software or BIOS, the users can edit and change the voice database in the
serial flash chip by themselves under O.S. A free Windows AP --- Voice Editor^TM is provided for the
voice editing, which can accept the *.wav file as the voice database resource. Users can replace the
voice with which they like through the S/W.
W83791SD/SG also provides two addresses setting pins A0 & A1 for different I²C^TM address and can
be connected up to 4 devices if necessary.
2. FEATURES
Speech Item
• Programmable speech synthesizer
• New high fidelity synthesis algorithm
• Build in 8-bit current D/A converter
• Instruction cycle 　400 µS typically
• Section control provided in each voice section
Variable frequency: 4.8/6/8/12 KHz
• External resistor for ring oscillator
• 1 CPU present or absent trigger input
• 5 External trigger inputs
• 127 Internal programmable trigger inputs with a watch dog timer
• Programmable 0-255 seconds timeout trigger inputs
General
• I²C^TM serial bus interface
• 2 pins (A0, A1) to provide selectable address setting for application of multiple devices (up to 4
devices) wired through I²C^TM interface
• Winbond hardware monitoring application software (Voice Editor^TM) support, for both Windows
95/98/ME/2000 and Windows NT 4.0/5.0
• Internal clock Oscillator with 3M Hz
• 5V VDD operation
Publication Release Date: January 18, 2005
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Revision 1.1