Pin Name
I/O
Options
Description
PC0~PC4
(28-pinpackageonly)
I/O
Pull-high
Bidirectional 8-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).
PC0~PC7
(48-pinpackageonly)
PD0/PWM0
PD1/PWM1/TMR1
(28-pinpackageonly)
I/O
Pull-high
PWM
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without a pull-high resistor.
The PWM0 output function is pin-shared with PD0.
The PWM1 output function is pin-shared with PD1 and TMR1.
(determined by pull-high option: byte option)
PD0/PWM0
PD1/PWM1
PD2/PWM2
PD3/PWM3
PD4~PD7
(48-pinpackageonly)
I/O
Pull-high
PWM
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without a pull-high resistor (de-
termined by pull-high option: byte option). The PWM0/PWM1/PWM2/
PWM3 output function are pin-sharedwith PD0/PD1/PD2/PD3(depending
on the PWM options).
PF0~PF7
(48-pin package only)
I/O
Pull-high
Bidirectional 8-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).
TMR0
I
Timer/Event Counter 0 Schmitt trigger input (without pull-high resistor)
TMR1
(48-pinpackageonly)
I
Timer/Event Counter 1 Schmitt trigger input (without pull-high resistor).
RES
I
Schmitt trigger reset input, active low
VSS
Negative power supply, ground
VDD
Positive power supply
OSC1
OSC2
I
O
Crystal
or RC
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.
TEST1~3
I
Test mode input pin it disconnects in normal operation.
NC
No connection
Absolute Maximum Ratings
Supply Voltage...........................V
SS
0.3V to V
SS
+6.0V
Storage Temperature............................ 50 C to 125 C
Input Voltage..............................V
SS
0.3V to V
DD
+0.3V
Operating Temperature........................... 40 C to 85 C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings 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.
D.C. Characteristics
Ta=25 C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD
Operating Voltage
f
SYS
=4MHz
2.2
5.5
V
f
SYS
=8MHz
3.3
5.5
V
I
DD1
Operating Current (Crystal OSC)
3V
No load, f
SYS
=4MHz
ADC disable
0.6
1.5
mA
5V
2
4
mA
I
DD2
Operating Current (RC OSC)
3V
No load, f
SYS
=4MHz
ADC disable
0.8
1.5
mA
5V
2.5
4
mA
HT46R24/HT46C24
Rev. 1.50
4
May 3, 2004