HT46R14
Pin Description
Pin Name
I/O
Option
Description
Bidirectional 8-bit input/output port. Each bit can be configured as wake-up in-
put by options. Software instructions determine the CMOS output or Schmitt
trigger input with or without pull-high resistor (determined by pull-high option:
bit option).
PA0/PPG1
PA1~PA2
PA3/PFD
PA4/TMR0
PA5/INT0
PA6/INT1
PA7/TMR1
Pull-high
Wake-up
The PFD, INT0 and INT1 are pin-shared with PA3, PA5 and PA6. The TMR0
is pin-shared with PA4, TMR1 is pin shared with PA7, respectively.
I/O
PA3 or PFD The PPG1 is a programmable pulse generator1 output pin, pin shared with
PA0. The PPG1 or I/O function is selected via configuration option. The PPG1
output pin is floating during power-on reset, RES pin reset or LVR reset. The
PPG1 output level (active low or active high) can be selected via configuration
option.
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without pull-high resistor (deter-
PB0/AN0~
PB7/AN7
I/O
Pull-high
mined by pull-high option: bit option) or A/D input.
Once a PB line is selected as an A/D input (by using software control), the I/O
function and pull-high resistor are disabled automatically.
Bidirectional 4-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without pull-high resistor (deter-
mine by pull-high option: byte option).
C0VIN+, C0VIN- and C0OUT are pin-shared with PC1, PC0 and PC2. Once
the Comparator 0 function is used, the internal registers related to PC1, PC0
cannot be used, PC2 can be used as input only, the PC1, PC0 I/O function,
PC2 output function and pull-high resistor are disabled automatically. Soft-
PC0/C0VIN-
PC1/C0VIN+
PC2/C0OUT
PC3/C1OUT
C1VIN+
Pull-high
I/O or
I/O
Comparator ware instructions determine the Comparator 0 function to be used.
C1VIN+ and C1VIN- are Comparator 1 input, C1OUT is pin-shared with PC3.
Once the Comparator 1 function is used, the internal register related to PC3
can be used as input only, the PC3 output function and pull-high resistor are
disabled automatically. Software instructions determine the Comparator 1
function to be used.
C1VIN-
This is a programmable pulse generator 0 output pin, the pin is floating during
PPG0
O
power-on reset, RES pin reset or LVR reset. The PPG0 output level (active
low or active high) can be selected via configuration option
¾
OSC1, OSC2 are connected to an RC network or a Crystal (determined by op-
tions) for the internal system clock. In the case of RC operation, OSC2 is the
output terminal for 1/4 system clock.
OSC1
OSC2
I
Crystal
or RC
O
RES
VDD
VSS
I
Schmitt trigger reset input. Active low.
Positive power supply
¾
¾
¾
¾
¾
Negative power supply, ground
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
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 reliabil-
ity.
Rev. 1.10
3
November 24, 2005
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
