HT46R01A
Device Markings
A suffix with the number 1, 2 or 3 will be added to each of the part numbers and printed on the package. The suffix num-
ber denotes the fixed oscillation frequency of the internal RC oscillator as shown.
Part No.
Device Marking
Internal RC Oscillator Frequency
46R01A1
46R01A2
46R01A3
4MHz
8MHz
HT46R01A
12MHz
Block Diagram
The following block diagram illustrates the main functional blocks.
W
a
t
c
h
d
o
g
W
a
t
c
h
d
o
g
T
i
m
e
r
T
i
m
e
r
O
s
c
i
l
l
a
t
o
r
O
T
P
S
t
a
c
k
P
r
o
g
r
a
m
m
i
n
g
C
i
r
c
u
i
t
r
y
R
e
s
e
t
I
/
O
8
-
b
i
C
t
C
i
r
c
u
i
t
P
o
r
t
s
R
I
S
O
T
P
M
C
U
R
A
M
D
a
t
a
I
n
t
e
r
r
u
p
t
P
r
o
g
r
a
m
C
o
r
e
M
e
m
o
r
y
C
o
n
t
r
o
l
l
e
r
M
e
m
o
r
y
R
C
/
C
r
y
s
t
a
l
O
s
c
i
l
l
a
t
o
r
P
r
o
g
r
a
m
m
a
b
l
e
P
W
M
A
/
D
F
r
e
q
u
e
n
c
y
T
i
m
e
r
D
r
i
v
e
r
C
o
n
v
e
r
t
e
r
L
o
w
G
e
n
e
r
a
t
o
r
I
n
t
e
r
n
a
l
V
o
l
t
a
g
e
O
s
c
i
l
l
a
t
o
r
R
e
s
e
t
Pin Assignment
1
0
9
8
7
6
P
A
3
/
I
N
T
/
A
N
3
1
2
3
4
5
P
A
4
/
P
W
M
P
A
2
/
T
M
R
0
/
A
N
2
P
A
5
/
O
S
S
C
C
2
1
P
A
1
/
P
F
D
/
/
A
A
N
N
1
0
P
A
6
7
/
/
O
R
P
A
0
P
V
A
D
E
S
V
S
S
D
H
T
4
6
R
0
1
A
1
0
M
S
O
P
-
A
Rev. 1.10
2
August 13, 2008