HT46CU66 HOLTEK [Holtek Semiconductor Inc], HT46CU66 Datasheet - Page 4

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

Pin Description
Rev. 1.20
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
PB0/AN0~
PB7/AN7
PC0/TMR2
PC1~PC5
PC6/TX
PC7/RX
PD0/PWM0
PD1/PWM1
PD2/PWM2
PD3/PWM3
PD4/INT0
PD5/INT1
PD6/TMR0
PD7/TMR1
OSC1
OSC2
OSC3
OSC4
VLCD
VMAX
V1, V2, C1, C2
SEG0~SEG7
SEG8~SEG15
SEG16~SEG23
SEG24~SEG45
COM0~COM2
COM3/SEG46
Pin Name
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
O
O
I
I
I
SEG8~SEG15 or
COM3 or SEG46
SEG0~SEG7 or
SEG16~SEG23
Configuration
1/3 or 1/4 Duty
System Clock
CMOS output
CMOS output
CMOS output
Crystal or RC
Wake-up
Pull-high
Pull-high
Pull-high
Pull-high
Interrupt
RTC or
Option
Buzzer
PWM
PFD
Bidirectional 8-bit input/output port. Each individual pin on this port can
be configured as a wake-up input by a configuration option. Software in-
structions determine if the pin is a CMOS output or Schmitt Trigger input.
Configuration options determine which pins on the port have pull-high
resistors. Pins PA0, PA1 and PA3 are pin-shared with BZ, BZ and PFD
respectively, the function of which is chosen via configuration options.
Bidirectional 8-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. Configuration options
determine which pins on the port have pull-high resistors. PB is
pin-shared with the A/D input pins. The A/D inputs are selected via soft-
ware instructions. Once selected as an A/D input, the I/O function and
pull-high resistor functions are disabled automatically.
Bidirectional 8-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. A Configuration option
determines if the port has pull-high resistors. Pin PC0 is pin-shared with
the timer input pin TMR2. Pins PC6 and PC7 are pin-shared with the
UART pins TX and RX.
Bidirectional 8-bit input/output port. Software instructions determine if
the pin is a CMOS output or Schmitt Trigger input. Configuration options
determine which pins on the port have pull-high resistors. PD0~PD3 are
pin-shared with PWM0~PWM3, the function of each pin is selected via a
configuration option. Pins PD4 and PD5 are pin-shared with external in-
terrupt input pins INT0 and INT1 respectively. Configuration options de-
termine the interrupt enable/disable and the interrupt low/high trigger
type. Pins PD6 and PD7 are pin-shared with the external timer input pins
TMR0 and TMR1 respectively.
OSC1 and OSC2 are connected to an external RC network or external
crystal, determined by configuration option, for the internal system clock.
For external RC system clock operation, OSC2 is an output pin where
the system frequency can be monitored, at a frequency of 1/4 system
clock. If an RTC oscillator on pins OSC3 and OSC4 is used as a system
clock, then the OSC1 and OSC2 pins should be left floating.
OSC3 and OSC4 are connected to a 32768Hz crystal to form a real time
clock for timing purposes or to form a system clock.
LCD power supply
IC maximum voltage, connect to V
LCD voltage pump
LCD driver outputs for LCD panel segments. A configuration option can
select all pins to be used as segment drivers or all pins to be used as
CMOS outputs.
LCD driver outputs for LCD panel segments. A configuration option can
select all pins to be used as segment drivers or all pins to be used as
CMOS outputs.
LCD driver outputs for LCD panel segments. Configuration options can
select each pin to be used as either a segment driver or each pin to be
used as a CMOS output.
LCD driver outputs for LCD panel segments
An LCD duty-cycle configuration option determines if SEG46 is config-
ured as a segment driver or as a common output driver for the LCD
panel. COM0~COM2 are the LCD common outputs.
4
Description
DD
HT46RU66/HT46CU66
, V
LCD
or V1
October 2, 2007