8XC196L
X

SUPPLEMENT

11-4
11.4 SERIAL PORT PROGRAMMING CIRCUIT AND ADDRESS MAPFigure 11-2 shows the circuit and Table 11-4 details the addres s map for serial port prog ramming.

Figure 11-2. Serial Port Programming Circuit

5
9
4
8
3
7
2
6
1
1.8k
1.8k
1.8k
1.8k1.8k
10µF
A5278-01
RXD
TXD
RXD
TXD
V
CC
87C196LA, LB
30 pF30 pF
XTAL1 XTAL2
P0.7/PMODE.3
P0.6/PMODE.2
P0.5/PMODE.1
P0.4/PMODE.0
ANGND
V
REF
V
CC
ABC
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