HT46F46E/HT46F47E/HT46F48E/HT46F49E
Configuration
Option
Pin Name I/O
Description
RES
VDD
VSS
I
Schmitt Trigger reset input. Active low.
¾
¾
¾
Positive power supply
¾
¾
Negative power supply, ground
Note: 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.
2. Individual pins can be selected to have a pull-high resistor.
HT46F49E
Configuration
Pin Name I/O
Description
Option
PA0~PA2
PA3/PFD
Bidirectional 8-bit input/output port. Each individual pin on this port can be config-
ured as a wake-up input by a configuration option. Software instructions deter-
mine if the pin is a CMOS output or Schmitt Trigger input. Configuration options
Pull-high
Wake-up
PA4/TMR
PA5/INT
I/O
I/O
PA3 or PFD determine which pins on the port have pull-high resistors. Pins PA3, PA4 and PA5
are pin-shared with PFD, TMR and INT, respectively.
PA6~PA7
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
PB4~PB7
Bidirectional 8-bit input/output port. Software instructions determine if the pin is a
CMOS output or Schmitt Trigger input. Configuration options determine which
Pull-high
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 software instructions. Once selected as an A/D in-
put, the I/O function and pull-high resistor options are disabled automatically.
Bidirectional 5-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.
PC0~PC4
I/O
I/O
Pull-high
Pull-high
Bidirectional 2-bit input/output port. Software instructions determine if the pin is a
CMOS output or Schmitt Trigger input. Configuration option determines if this pin
PD0/PWM0
PD1/PWM1
I/O or PWM has a pull-high resistor. The PWM output are pin-shared with pins PD0 and PD1
selected via a configuration option.
OSC1, OSC2 are connected to an external RC network or external crystal, deter-
OSC1
OSC2
I
mined by configuration option, for the internal system clock. If the RC system
Crystal or RC
O
clock option is selected, pin OSC2 can be used to measure the system clock at
1/4 frequency.
RES
VDD
VSS
I
Schmitt Trigger reset input. Active low.
Positive power supply
¾
¾
¾
¾
¾
Negative power supply, ground
Note: 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.
2. Individual pins can be selected to have a pull-high resistor.
3. Pins PC2~PC4 and pin PD1/PWM1 exist but are not bonded out on the 24-pin package.
4. Unbonded pins should be setup as outputs or as inputs with pull-high resistors to conserve power.
Absolute Maximum Ratings
Supply Voltage...........................VSS-0.3V to VSS+6.0V
Input Voltage..............................VSS-0.3V to VDD+0.3V
Storage Temperature............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°C
I
OL Total ..............................................................150mA
I
OH Total............................................................-100mA
Total Power Dissipation .....................................500mW
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Rev. 1.40
5
July 28, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
