HT68F04 Holtek Semiconductor, HT68F04 Datasheet - Page 4

• Manufacturer Part Number: HT68F04
• Description: Small Package Enhanced Flash Type 8-Bit MCU
• Manufacturer: Holtek Semiconductor

Pin Description
With the exception of the power pins, all pins on these devices can be referenced by their Port name, e.g. PA.0, PA.1
etc, which refer to the digital I/O function of the pins. However these Port pins are also shared with other function such
as the Analog to Digital Converter, Serial Port pins etc. The function of each pin is listed in the following table, however
the details behind how each pin is configured is contained in other sections of the datasheet.
The following tables only include the pins which are directly related to the MCU. The pin descriptions of the additional
peripheral functions are located at the end of the datasheet along with the relevant peripheral function functional de-
scription.
HT66F03
Note:
Rev. 1.00
PA0~PA7
AN0~AN3
VREF
C-
C+
CX
TCK0
TCK1
TP0
TP1
INT
OSC1
OSC2
RES
VDD
AVDD
VSS
AVSS
Pin Name
I/T: Input type; O/T: Output type
OP: Optional by configuration option (CO) or register option
PWR: Power; CO: Configuration option; ST: Schmitt Trigger input
CMOS: CMOS output; NMOS: NMOS output
SCOM: Software controlled LCD COM; AN: Analog input pin
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
*: VDD is the device power supply while AVDD is the ADC power supply. The AVDD pin is bonded together
internally with VDD.
**: VSS is the device ground pin while AVSS is the ADC ground pin. The AVSS pin is bonded together internally
with VSS.
Port A
A/D converter input
A/D converter reference input
Comparator input
Comparator input
Comparator output
TM0 input
TM1 input
TM0 I/O
TM1 I/O
External Interrupt
HXT/ERC/LXT pin
HXT/LXT pin
Reset pin
Power supply *
A/D converter power supply *
Ground **
A/D converter ground **
Function
ADCR1
ACERL
PAWU
PAPU
CPC
PRM
PRM
PRM
PRM
OP
CO
CO
CO
¾
¾
¾
¾
¾
HT66F03/HT66F04/HT68F03/HT68F04
4
PWR
PWR
PWR
PWR
HXT
LXT
AN
AN
AN
AN
ST
ST
ST
ST
ST
ST
ST
I/T
¾
¾
CMOS
CMOS
CMOS
CMOS
HXT
LXT
O/T
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
PA0~PA3
PA1
PA1
PA0
PA2
PA4, PA6 or PA7
PA3 or PA7
PA3, PA5 or PA2
PA4, PA6 or PA7
PA3 or PA7
PA6
PA5
PA7
¾
¾
¾
¾
Pin-Shared Mapping
April 16, 2010
www.DataSheet4U.com