Rainbow Electronics aP89042 - Manual (Page 18)

Integrated Circuits Inc. aP89042
Ver 3.0 Dec 6, 2006 18
CPU Parallel Mode
Fig. 14 5V CPU Control with COUT
VDD,VPP
VSS
RST
S5
OUT[1..3]
OSC
0.01uF
10uF
R OSC
8050D
COUT
8Ω
Speaker
HT7335
S1
S2
S3
VOUT=+3.5V
Addr[0]
Addr[1]
Addr[2]
Addr[4]
I[0..2]
•
•
•
•
•
•
•
•
•
VIN=+5V
Rin = 860KΩ x (VIN-VOUT) / VIN
Rin
3
M
C
U