Chapter 1 Hardware Structure
V
D D
D a ta B u s
W r ite D a ta R e g is te r
C h ip R e s e t
F o rm
U A R T T X
D a ta B it
Q
D
C K
Q
S
M
U
X
P u ll- H ig h
O p tio n
C M O S /N M O S
O p tio n
W e a k
P u ll- u p
P C 0 /T X
U A R T E N & T X E N
R e a d D a ta R e g is te r
PC0/TX Input/Output Port
-
HT49RU80/HT49CU80
V
D D
D a ta B u s
W r ite D a ta R e g is te r
C h ip R e s e t
D a ta B it
Q
D
C K
Q
S
P u ll- H ig h
O p tio n
C M O S /N M O S
O p tio n
W e a k
P u ll- u p
P C 1 /R X
U A R T E N
& R X E N
R e a d D a ta R e g is te r
T o U A R T R X
PC1/RX Input/Output Port
-
HT49RU80/HT49CU80
V
D a ta B it
D a ta B u s
D
C K
S
Q
W r ite D a ta R e g is te r
C h ip R e s e t
Q
D D
P D
P D
P D
P D
P D
P D
P D
0 /S
1 /S
2 /S
3 /S
4 /S
5 /S
6 /S
E G
E G
E G
E G
E G
E G
E G
4 0
4 1
4 2
4 3
4 4
4 5
4 6
PD Output Port
-
HT49RU80/HT49CU80
47
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