HT46F46E/HT46F47E/HT46F48E/HT46F49E
Configuration Options
Configuration options refer to certain options within the MCU that are programmed into the device during the program-
ming process. During the development process, these options are selected using the HT-IDE software development
tools. As these options are programmed into the device using the hardware programming tools, once they are selected
they cannot be changed later as the application software has no control over the configuration options. All options must
be defined for proper system function, the details of which are shown in the table.
No.
1
Options
Watchdog Timer clock source: WDT oscillator or fSYS/4
Watchdog Timer function: enable or disable
WDT time-out period: 213/fS, 214/fS, 215/fS, or 216/fS
CLRWDT instructions: 1 or 2 instructions
2
3
4
5
System oscillator: Crystal or RC
PA, PB and PD: pull-high enable or disable
6
7
PC: pull-high enable or disable - HT46F48E and HT46F49E only
PWM: enable or disable - Except HT46F49E
PWM0, PWM1: enable or disable - HT46F49E only
PWM mode: 6+2 or 7+1 mode selection
8
9
PA0~PA7: wake-up enable or disable - bit option
PFD: normal I/O or PFD output
LVR function: enable or disable
10
11
Low voltage reset voltage: 2.1V, 3.15V or 4.2V
External interrupt INT trigger edge: disable, rising, falling, or double (rising or falling)
Application Circuits
V
D
D
V
D
D
P
A
0
~
P
A
2
P
A
3
/
P
F
D
R
R
e
s
e
t
P
A
4
/
T
M
1
0
W
0
k
C
i
r
c
u
i
t
P
A
5
/
I
N
T
0
m
. F 1
R
E
S
P
A
6
~
P
A
7
0
m
. F 1
P
B
0
/
A
N
0
~
P
B
3
/
A
N
3
P
B
4
~
P
B
7
4
V
S
S
P
C
0
~
P
C
P
D
0
/
P
W
M
O
O
S
S
C
C
1
2
O
S
C
C
i
r
c
u
i
t
S
e
e
O
s
c
i
l
l
a
t
o
r
S
e
c
t
i
o
n
Rev. 1.40
56
July 28, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
