HT46F46E/HT46F47E/HT46F48E/HT46F49E
Pin Description
HT46F46E, HT46F47E
Pin Name I/O
PA0~PA2
PA3/PFD
PA4/TMR
PA5/INT
PA6~PA7
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
Configuration
Option
Pull-high
Wake-up
PA3 or PFD
Description
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 determine
if the pin is a CMOS output or Schmitt Trigger input. Configuration options deter-
mine which pins on the port have pull-high resistors. Pins PA3, PA4 and PA5 are
pin-shared with PFD, TMR and INT, respectively.
Bidirectional 4-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 software instructions. Once selected as an A/D input,
the I/O function and pull-high resistor options are disabled automatically.
I/O
I/O
Pull-high
PD0/PWM I/O
Bidirectional 1-bit input/output port. Software instructions determine if the pin is a
Pull-high
CMOS output or Schmitt Trigger input.
PD0 or PWM A configuration option determines if this pin has a pull-high resistor. The PWM out-
put is pin-shared with pin PD0 selected via a configuration option.
OSC1, OSC2 are connected to an external RC network or external crystal, deter-
mined by configuration option, for the internal system clock. If the RC system clock
Crystal or RC
option is selected, pin OSC2 can be used to measure the system clock at 1/4 fre-
quency.
¾
¾
¾
Schmitt Trigger reset input. Active low.
Positive power supply
Negative power supply, ground
OSC1
OSC2
RES
VDD
VSS
Note:
I
O
I
¾
¾
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 PB2/AN2~PB3/AN3 exist but are not bonded out on the 16-pin package.
4. Unbonded pins should be setup as outputs or as inputs with pull-high resistors to conserve power.
HT46F48E
Pin Name I/O
PA0~PA2
PA3/PFD
PA4/TMR
PA5/INT
PA6~PA7
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
PB4~PB7
PC0~PC1
Configuration
Option
Pull-high
Wake-up
PA3 or PFD
Description
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 determine
if the pin is a CMOS output or Schmitt Trigger input. Configuration options deter-
mine which pins on the port have pull-high resistors. Pins PA3, PA4 and PA5 are
pin-shared with PFD, TMR and INT, respectively.
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 software instructions. Once selected as an A/D input,
the I/O function and pull-high resistor options are disabled automatically.
Bidirectional 2-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.
Bidirectional 1-bit input/output port. Software instructions determine if the pin is a
CMOS output or Schmitt Trigger input. Configuration option determines if this pin
has a pull-high resistor. The PWM output is pin-shared with pin PD0 selected via a
configuration option.
I/O
I/O
Pull-high
I/O
Pull-high
PD0/PWM I/O
Pull-high
I/O or PWM
OSC1
OSC2
I
O
OSC1, OSC2 are connected to an external RC network or external crystal, deter-
Crystal or RC mined by configuration option, for the internal system clock. If the RC system clock op-
tion is selected, pin OSC2 can be used to measure the system clock at 1/4 frequency.
Rev. 1.40
4
July 28, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
