AP89341 Datasheet, PDF (20/24 Pages) Aplus Intergrated Circuits – Standard CMOS process

Integrated Circuits Inc. aP89341/170/085
CPU Parallel Mode
VIN=+5V
VOUT=+3.5V
HT7335
0.01uF
C
ROSC
VDD, AVDD,VPP
8Ω 1/4W
Speaker
RST
OSC
COUT
T
Addr[0]
S1
Rb
Addr[1]
S2
Addr[2]
S3
••
•
••
•
••
•
Addr[7]
S8
I[0..2]
Rin
3 _OUT[1..3]
VSS,
Rin = 860KΩ x (VIN-VOUT) / VIN
Fig. 24 5V CPU Control with COUT
Note:
1. C1 is capacitor from 0.1uF to 4.7uF depends on the kind of Vdd source and sound loudness.
2. Rb is base resistor from 120 Ohm to 390 Ohm depends on Vdd value and transistor gain.
3. T is an NPN transistor with beta larger than 150.
4. Reference value for the above components are C = 2.2uF, Rb = 390 Ohm and T = 8050D.
5. Refer to the Oscillator Resistor Table for suitable value of Rosc.
Ver 3.1
19
Oct 09, 2008