Application Circuits
HT46R46/C46/R47/C47/R48A/C48A/R49
Rev. 1.41
45
December 30, 2008
P D 0 / P W M
P B 0 / A N 0 ~ P B 3 / A N 3
P B 4 ~ P B 7
P A 0 ~ P A 2
P A 3 / P F D
P A 4 / T M R
P A 5 / I N T
P A 6 ~ P A 7
P C 0 ~ P C 1
P C 2 ~ P C 4
R E S
0 . 1
m
F
1 0 0 k
W
V D D
V S S
0 . 1
m
F
V
D D
R e s e t
C i r c u i t
O S C 1
O S C 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
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.
Options
1
Watchdog Timer clock source: WDT oscillator or f
SYS
/4
2
Watchdog Timer function: enable or disable
3
CLRWDT instructions: 1 or 2 instructions
4
System oscillator: Crystal or RC
5
PA, PB and PD: pull-high enable or disable
PC: pull-high enable or disable - HT46R48A and HT46R49 only
6
PWM: enable or disable - Except HT46R49
PWM0, PWM1: enable or disable - HT46R49 only
7
PA0~PA7: wake-up enable or disable - bit option
8
PFD: normal I/O or PFD output
9
LVR function: enable or disable
