HT48R70A-1/HT48C70-1
Pad Description
Pad Name
I/O
Options
Wake-up
Pull-high*
CMOS or Schmitt
Input
Pull-high*
¾
¾
¾
¾
Pull-high*
¾
¾
Description
Bidirectional 8-bit input/output ports
Each bit can be configured as a wake-up input by options. Software instruc-
tions determine the CMOS output or Schmitt trigger or CMOS input with or with-
out pull high resistor (by options).
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
Negative power supply, ground
External interrupt Schmitt trigger without pull high resistor
Edge trigger is activated during high to low transition.
Schmitt trigger input for Timer/Event Counter 0
Schmitt trigger input for Timer/Event Counter 1
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
Schmitt trigger reset input, active low
Positive power supply
OSC1 and OSC2 are connected to an RC network or a crystal (by options) for
the internal system clock. In the case of RC operation, OSC2 is the output
terminal for 1/4 system clock.
These two pins also can be optioned as an RTC oscillator (32768Hz). In this
case, the system clock comes from an internal RC oscillator whose fre-
quency has 4 options (3.2MHz, 1.6MHz, 800kHz, 400kHz)
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
Bidirectional 8-bit input/output ports
Software instructions determine the CMOS output or Schmitt trigger input
(pull-high depends on options).
PA0~PA7
I/O
PB0~PB7
VSS
INT
TMR0
TMR1
PC0~PC7
RES
VDD
I/O
¾
I
I
I
I/O
I
¾
OSC1
OSC2
I
O
Crystal
or RC
or RTC
PD0~PD7
I/O
Pull-high*
PE0~PE7
I/O
Pull-high*
PF0~PF7
I/O
Pull-high*
PG0~PG7
Note:
I/O
Pull-high*
* The pull-high resistors of each I/O port (PA, PB, PC, PD, PE, PF, PG) are controlled by an option.
CMOS or Schmitt trigger option of port A is controlled by an option.
Absolute Maximum Ratings
Supply Voltage ...........................V
SS
-0.3V
to V
SS
+6.0V
Input Voltage..............................V
SS
-0.3V
to V
DD
+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. 1.60
5
June 9, 2004
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
