Intel MCS48 User Manual page 132

APPLICATION
EXAMPLES
+5V GND
28
„
14
1iufd_L-
DIODE
OPTIONAL
Vcc Vss
XTAL
1
XTAL2
8021
8022*
ALE PROG
POO
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
Vcc
8243
I/O
EXPANDER
P20
P21
P22
P23
PROG
CS
P40
P41
P42
P43
P50
P51
P52
P53
P60
P61
P62
P63
P70
P71
P72
P73
*PIN
NUMBERS ARE
DIFFERENT
FOR
8022
ADDING AN
I/O
EXPANDER TO THE
8021,8022
5-12