HT48R0AA-1
Pin Description
Configuration
Options
Pin Name I/O
Description
Bidirectional 8-bit I/O port. Each bit can be configured as a wake-up input by
configuration option. Software instructions determined the CMOS output or
Schmitt trigger input with a pull-high resistor (determined by a pull-high configu-
ration option).
Pull-high
Wake-up
PA0~PA7
I/O
I/O
Bidirectional 8-bit I/O port. Software instructions determined the CMOS output or
Schmitt trigger input with a pull-high resistor (determined by a pull-high configu-
ration option). The PB0 and PB1 are pin-shared with the BZ and BZ, respec-
PB0/BZ
PB1/BZ
PB2~PB7
Pull-high
I/O or BZ/BZ tively. Once the PB0 and PB1 are selected as buzzer driving outputs, the output
signals come from an internal PFD generator (shared with an 8 bits timer/event
counter).
Bidirectional 6-bit I/O lines. Software instructions determine the CMOS output
or Schmitt trigger input with a pull-high resistor (determined by a pull-high con-
PC0/TMR0
PC1~PC4 I/O
PC5/TMR1
Pull-high
Pull-high
figuration option). The Timer/Event Counter 0 and the Timer/Event Counter 1
counter input (Schmitt trigger input without pull-high resistor) are pin-shared
with the PC0 and PC5, respectively.
Bi-directional I/O line. Software instructions determine the CMOS output or
Schmitt trigger input with a pull-high resistor (determined by a pull-high configu-
ration option). the external interrupt input INT, is pin-shared with PD0 and is ac-
tivated on a high to low transition.
PD0/INT
I/O
VDD
VSS
RES
Positive power supply
¾
¾
I
¾
¾
¾
Negative power supply, ground
Schmitt trigger reset input. Active low.
OSC1, OSC2 are connected to an RC network or Crystal (determined by con-
figuration options) 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
Note: The pull-high resistors of each I/O port (PA, PB, PC, PD) are controlled by configuration options.
Each pin on PA can be programmed through a configuration option to have a wake-up function.
Pins PC1~PC4 exist but are not bonded out on the 24-pin package.
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
IOH Total............................................................-100mA
I
OL Total ..............................................................150mA
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. 1.10
3
July 27, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
