Rainbow Electronics aP89010 - Manual (Page 17)

Integrated Circuits Inc. aP89021/010
Ver 2.0 Dec 6, 2006 17
CPU Parallel Mode
Fig. 14 5V CPU Control with COUT
VDD,VPP
VSS
RST
S4
OUT[1..3]
OSC
0.1uF
10uF
R OSC
8050D
COUT
8Ω
Speaker
HT7335
S1
S2
S3
VOUT=+3.5V
Addr[0]
Addr[1]
Addr[2]
Addr[3]
I[0..2]
VIN=+5V
Rin = 860KΩ x (VIN-VOUT) / VIN
Rin
3
M
C
U