HT45R37
Block Diagram
L o w
V o lta g e
D e te c t
L o w
V o lta g e
R e s e t
O T P
P r o g r a m m in g
C ir c u itr y
8 - b it
R IS C
M C U
C o re
W a tc h d o g
T im e r
W a tc h d o g
T im e r O s c illa to r
R e s e t
C ir c u it
In te rru p t
C o n tr o lle r
E x te rn a l
R C /C ry s ta l
O s c illa to r
S ta c k
In te rn a l R C
O s c illa to r
A /D
C o n v e rte r
I
2
C /S P I
C /R to F
G e n e ra to r
T im e r s
P r o g r a m m a b le
F re q u e n c y
G e n e ra to r
E x te rn a l R T C
O s c illa to r
I/O
P o rts
O T P
P ro g ra m
M e m o ry
R A M
D a ta
M e m o ry
P W M
G e n e ra to r
Pin Assignment
P B 3 /A N 3
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
P B 2 /A N 2
P B 2 /A N 2
P B 1 /A N 1
P B 1 /A N 1
1
2
3
4
5
6
7
8
9
1 0
P B 0 /A N 0
V S S /A V S S
C R E F
R R E F
R C O U T /IN
P A 0 /B Z /R C 0
P A 1 /B Z /R C 1
P A 2 /T M R 0 /R C 2
P A 3 /P F D /R C 3
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
P B 2 /A N 2
P B 3 /A N 3
P C 2 /O S C 2
P C 1 /O S C 1
V D D /A V D D
P C 0 /R E S
P A 7 /IN T 1 /S D O /R C 7
P A 6 /IN T 0 /S D I/S D A /R C 6
P A 5 /S C K /S C L /R C 5
P A 4 /T M R 1 /S C S /R C 4
P B 0 /A N 0
V S S /A V S S
C R E F
R R E F
R C O U T /IN
P A 0 /B Z /R C 0
P A 1 /B Z /R C 1
P A 2 /T M R 0 /R C 2
P A 3 /P F D /R C 3
P D 0 /P W M 0 /R C 8
9
1 0
1 1
1 2
8
7
6
5
4
3
2
1
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
P B 3 /A N 3
P B 4 /A N 4
P B 5 /A N 5
P C 2 /O S C 2
P C 1 /O S C 1
V D D /A V D D
P C 0 /R E S
P A 7 /IN T 1 /S D O /R C 7
P A 6 /IN T 0 /S D I/S D A /R C 6
P A 5 /S C K /S C L /R C 5
P A 4 /T M R 1 /S C S /R C 4
P D 1 /P W M 1 /R C 9
P B 1 /A N 1
P B 0 /A N 0
V S S /A V S S
C R E F
R R E F
R C O U T /IN
P A 0 /B Z /R C 0
P A 1 /B Z /R C 1
P A 2 /T M R 0 /R C 2
P A 3 /P F D /R C 3
P D 0 /P W M 0 /R C 8
P D 1 /P W M 1 /R C 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
P B 4 /A N 4
P B 5 /A N 5
P C 3 /O S C 3
P C 4 /O S C 4
P C 2 /O S C 2
P C 1 /O S C 1
V D D /A V D D
P C 0 /R E S
P A 7 /IN T 1 /S D O /R C 7
P A 6 /IN T 0 /S D I/S D A /R C 6
P A 5 /S C K /S C L /R C 5
P A 4 /T M R 1 /S C S /R C 4
P D 7 /P C L K /R C 1 5
P D 6 /P IN T /R C 1 4
H T 4 5 R 3 7
2 0 D IP -A /S O P -A
H T 4 5 R 3 7
2 4 S K D IP -A /S O P -A
H T 4 5 R 3 7 -A
2 8 S K D IP -A /S O P -A /S S O P -A
P
C 1 /O
C 2 /O
C 4 /O
C 3 /O
P B 5
P B 4
P B 3
P B 2
P B 1
P B 0
P
P
P
P C 4 /O
P C 3 /O
P B 5
P B 4
P B 3
P B 2
P B 1
P B 0
N
S C
S C
S C
S C
/A N
/A N
/A N
/A N
/A N
/A N
P B 0 /A N 0
1
2
3
4
5
6
7
8
9
V S S /A V S S
C R E F
R R E F
R C O U T /IN
P A 0 /B Z /R C 0
P A 1 /B Z /R C 1
P A 2 /T M R 0 /R C 2
P A 3 /P F D /R C 3
P D 0 /P W M 0 /R C 8
P D 1 /P W M 1 /R C 9
P D 2 /R C 1 0
P D 3 /R C 1 1
P D 4 /R C 1 2
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 0
1 1
1 2
1 3
1 4
1 9
1 8
1 7
1 6
1 5
P B 1 /A N 1
P C 3 /O S C 3
P C 4 /O S C 4
P C 2 /O S C 2
P C 1 /O S C 1
V D D /A V D D
P C 0 /R E S
P A 7 /IN T 1 /S D O /R C 7
P A 6 /IN T 0 /S D I/S D A /R C 6
P A 5 /S C K /S C L /R C 5
P A 4 /T M R 1 /S C S /R C 4
P D 7 /P C L K /R C 1 5
P D 6 /P IN T /R C 1 4
P D 5 /R C 1 3
P A 2
P A
P
P
V S S /A
C
R
R C O U
A 0 /B Z
A 1 /B Z
/T M R 0
3 /P F D
V S S
R E F
R E F
T /IN
/R C 0
/R C 1
/R C 2
/R C 3
2
3
4
5
6
7
8
1
C
0
3
4
2
1
1
2
3
4
5
S C
S C
/A N
/A N
/A N
/A N
/A N
/A N
3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5
2 4
2 3
2 2
H T 4 5 R 3 7
3 2 Q F N -A
2 1
2 0
1 9
1 8
1 7
9 1 0 1 1 1 2 1 3 1 4 1 5 1 6
P C 2
P C 1
V D D
P C 0
P A 7
P A 6
P A 5
P A 4
/O S
/O S
/A V
/R E
/IN T
/IN T
/S C
/T M
C 2
S
C 1
D D
O /R C 7
I/S D A /R C 6
L /R C 5
C S /R C 4
1 /S D
0 /S D
K /S C
R 1 /S
IR E
P A
P A
P A 2 /T
F /R
0 /B
1 /B
M R
V S
C R E
R R E
C O U
Z /R C
Z /R C
0 /R C
N
N
N
N
C
C
C
C
S
F
T
F
1
2
3
4
4 4 4 3 4 2 4 1 4 0 3 9 3 8 3 7 3 6 3 5 3 4
5
0
3
4
0
1
2
7
8
9
1 0
1 1
6
5
1
P D 7
P D 6
P D 5
P D 4
P D 3
P D 2
P D 1
P D 0
/P C
/P IN
/R C
/R C
/R C
/R C
/P W
/P W
L K /R
T /R C
1 3
1 2
1 1
1 0
M 1 /R
M 0 /R
2
3
4
3 3
3 2
3 1
3 0
H T 4 5 R 3 7
4 4 Q F P -A
2 9
2 8
2 7
2 6
2 5
2 4
1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2
2 3
V D D
P C 0 /R E S
N C
N C
N C
N C
N C
N C
N C
P A 7 /IN T 1 /S D O /R C 7
P A 6 /IN T 0 /S D I/S D A /R C 6
P A
P A
P D
P D
P D
P D
P D
P D
P D
P D
P A
5 /S
4 /T
7 /P
6 /P
5 /R
4 /R
3 /R
2 /R
1 /P
0 /P
3 /P
C K /S C
M R 1 /S
C L K /R
IN T /R C
C 1 3
C 1 2
C 1 1
C 1 0
W M 1 /R
W M 0 /R
F D /R C
H T 4 5 R 3 7 -B
2 8 S K D IP -B /S O P -B /S S O P -B
C 1 5
1 4
C 8
C 9
L /R C 5
C S /R C 4
C 1 5
1 4
3
C 9
C 8
Rev. 1.20
2
February 25, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
