HT46CU66 HOLTEK [Holtek Semiconductor Inc], HT46CU66 Datasheet - Page 45

• Manufacturer Part Number: HT46CU66
• Description: A/D Type 8-Bit MCU with LCD
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Rev. 1.20
WDT enable/disable selection.
WDT can be enabled or disabled by option.
WDT time-out period selection.
There are four types of selection: WDT clock source divided by 2
2
CLR WDT times selection.
This option defines the method to clear the WDT by instruction. One time means that the CLR WDT can clear the
WDT. Two times means only if both of the CLR WDT1 and CLR WDT2 have been executed, only then can the
WDT be cleared.
Time Base time-out period selection.
The Time Base time-out period ranges from clock/2
Buzzer output frequency selection.
There are eight types of frequency signals for the buzzer output: clock/2
selected by options.
Wake-up selection. This option defines the wake-up capability. External I/O pins (PA only) all have the capability to
wake-up the chip from a HALT by a falling edge (bit option).
Pull-high selection.
This option is to determine whether the pull-high resistance is viable or not in the input mode of the I/O ports. PA, PB,
PC and PD can be independently selected (bit option).
I/O pins share with other function selections.
PA0/BZ, PA1/BZ: PA0 and PA1 can be set as I/O pins or buzzer outputs.
PA3/PFD: PA3 can be set as I/O pins or PFD output.
LCD common selection.
There are three types of selections: 2 common (1/2 duty) or 3 common (1/3 duty) or 4 common (1/4 duty). If the 4
common is selected, the segment output pin SEG46 will be set as a common output.
LCD bias power supply selection.
There are two types of selections: 1/2 bias or 1/3 bias
LCD bias type selection.
This option is to determine what kind of bias is selected, R type or C type (Low or high bias current option).
LCD driver clock frequency selection.
There are seven types of frequency signals for the LCD driver circuits: f
lection by options.
LCD ON/OFF at HALT selection.
LCD Segments as logical output selection, (byte, byte, bit, bit, bit, bit, bit, bit, bit, bit option)
[SEG0~SEG7], [SEG8~SEG15], SEG16, SEG17, SEG18, SEG19, SEG20, SEG21, SEG22, or SEG23
LVR selection.
LVR has enable or disable options
LVD selection.
LVD has enable or disable options
PFD selection.
If PA3 is set as PFD output, there are two types of selections; One is PFD0 as the PFD output, the other is PFD1 as
the PFD output. PFD0, PFD1 are the timer overflow signals of the Timer/Event Counter 0, Timer/Event Counter 1 re-
spectively.
PWM selection: (7+1) or (6+2) mode
PD0: level output or PWM0 output
PD1: level output or PWM1 output
PD2: level output or PWM2 output
PD3: level output or PWM3 output
INT0 or INT1 triggering edge selection: disable; high to low; low to high; low to high or high to low.
15
/f
S
~2
16
/f
S
.
12
to clock/2
Options
45
15
. clock means the clock source selected by options.
S
/2
2
12
~ clock/2
2
/f
~f
S
S
~2
/2
13
8
. f
HT46RU66/HT46CU66
/f
9
S
S
. clock means the clock source
, 2
stands for the clock source se-
13
/f
S
~2
14
/f
S
, 2
October 2, 2007
14
/f
S
~2
15
/f
S
or