HT46R47
V
D
D
5
V
.
5
V
L
V
R
D
e
t
e
c
t
V
o
l
t
a
g
e
L
V
R
0
.
9
V
0
V
R
e
s
e
t
S
i
g
n
a
l
R
e
s
e
t
N
o
r
m
a
l
O
p
e
r
a
t
i
o
n
R
e
s
e
t
*
1
*
2
Low voltage reset
Note: *1:To make sure that the system oscillator has stabilized, the SST provides an extra delay of
1024 system clock pulses before entering the normal operation.
*2:Since the low voltage has to maintain in its original state and exceed 1ms, therefore 1ms
delay enter the reset mode.
ROM code option
The following table shows all kinds of ROM code option in the microcontroller. All of the ROM code
options must be defined to ensure proper system functioning.
Items
Option
1
2
WDT clock source: WDTOSC/fTID
WDT enable/disable: enable/disable
CLRWDT instruction(s)
: one/two clear WDT
instruction(s)
3
4
5
System oscillator: RC/Crystal
Pull-high resistors (PA, PB, PD):
none/pull-high
6
7
PWM enable/disable
PA0~PA7 wake-up: disable/enable
PFD enable/disable
8
9
Lock: unlock/lock
10
Low voltage reset selection: Enable or disable LVR function.
Rev. 1.40
22
July 18, 2001
ETC [ ETC ]
