335P14d66P0434P15789C52P0533P168P0632P171289S52P072INT0P3213P202INT1P33C1P21214P222T0P34VCC15P232T1P3530PP242Y131P252EAVPPP262C2110592M18P2787654321hgfedca
S
1
S
2
S
3
S
1
9
XTAL0
2
XTAL1
C
VCC
3
VSS
4
2
2
u
VCC
0
0
3
0
P
9

RESET
1
0
BELL
VCC
S
5
S
6
S
7
S
S
1
6
P30
RXD
1
1
WR
P36
R20
1
7
P31
TXD
3
RD
P37
PROG
ALE
2
RST
1
0
k
PSEN
9
0
we
du
S
9
S10
S11
vcc
S13
S14
S15
图36键盘与单片机的连接
34DS18B20温度传感器
DS1820是世界上第一片支持