W83791G Datasheet, PDF (20/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
6.3.3 Connection of EEPROM
As described previously the W83791D/G has connectable W55FXX to store voice data. To expand the
storage capacity, users can select many W55FXX to connect with each other. The maximum capacity
could be up to 16Mbit. Following is the connection chart of W55FX with W83791D/G.
EEPROM
DATA ADDR CLK CTRL MODE EOP
EEPROM
DATA ADDR CLK CTRL MODE EOP
SLOTOCC#
EVTTRAP 1: 5
DATA ADDR CLK CTRL MODE EOP
Speech Synthesizer
(W83791D)
9-bit DAC
SPK/LED
Internal programmable Hardware monitor status
trigger
trigger
Figure 4 Speech Function Diagram
6.3.4 Speaker Output
Speech output pin is a 8 bit Current D/A converter, with which loading is needed. The resistor could
range from 510~1K ohm and bipolar could be a low power NPN bipolar with β of 120 - 160. Usually,
an 8050D transistor is appropriate. The spec of speaker is 8 Ω. Besides, SPK can also connect to
AC97 codec chip Line_Out. C is decouple capacitor and is usually 200p- 0.01uF
SPK
R
8 ohm speaker
8050D, NPN transistor
C
Figure. 5
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Publication Release Date: April 14, 2006
Revision 1.1