Intel 87C196CA, Supplement To User’S Manual

Page: 104 / 136

8XC196L
X SUPPLEMENT
11-4
11.4 SERIAL PORT PROGRAMMING CIRCUIT AND ADDRESS MAP
Figure 11-2 shows the circuit and Table 11-4 details the address map for serial port programming.
Figure 11-2. Serial Port Programming Circuit
5
9
4
8
3
7
2
6
1
1.8k
Ω
1.8k
Ω
1.8k
Ω
1.8k
Ω
1.8k
Ω
10µF
A5278-01
RXD
TXD
RXD
TXD
V
CC
87C196LA, LB
30 pF 30 pF
XTAL1 XTAL2
P0.7/PMODE.3
P0.6/PMODE.2
P0.5/PMODE.1
P0.4/PMODE.0
ANGND
V
REF
V
CC
A B C
V
CC
V
PP
EA#
0.01 µF
V
PP
P2.0/TXD
P2.1/RXD
10 µF
V
CC
RESET#
1N914
2N2222A
2N2907
1N914