HT46RU25 Holtek Semiconductor Inc., HT46RU25 Datasheet - Page 4

• Manufacturer Part Number: HT46RU25
• Description: Ht46ru25/ht46cu25 -- A/d Type 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Pin Description
Absolute Maximum Ratings
Supply Voltage ...........................V
Input Voltage..............................V
I
Total Power Dissipation .....................................500mW
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
Rev. 1.30
OL
PA0~PA2
PA3/PFD
PA4
PA5/INT
PA6/SDA
PA7/SCL
PB0/AN0~
PB7/AN7
PC0/TX
PC1/RX
PC2~PC5
PC6/OSC3
PC7/OSC4
PD0/PWM0
PD1/PWM1
PD2/PWM2
PD3/PWM3
PD4~PD7
PF0~PF7
PG0~PG7
(56-pin package only)
TMR0
TMR1
TMR2
RES
VSS
VDD
OSC1
OSC2
Total ..............................................................150mA
Pin Name
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.
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
I
I
I
I
I
I/O or I
OSC3/OSC4
I/O or UART
PA3 or PFD
Wake-up
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
Options
Crystal
or RC
PWM
2
SS
SS
C Bus
0.3V to V
0.3V to V
Bidirectional 8-bit input/output port. Each bit can be configured as wake-up
input by option (bit option). Software instructions determine the CMOS out-
put or Schmitt trigger input with or without pull-high resistor (determine by
pull-high options: bit option). The PFD and INT are pin-shared with PA3
and PA5, respectively. Once the I
isters related to PA6 and PA7 cannot be used.
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output, Schmitt trigger input with or without pull-high resistor (deter-
mined by pull-high option: bit option) or A/D input. Once a PB line is se-
lected as an A/D input (by using software control), the I/O function and
pull-high resistor are automatically disabled.
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).
TX and RX are pin-shared with PC0 and PC1, once the UART Bus function
is used, the internal registers related to PC0 and PC1 cannot be used.
Software instructions determine the UART function to be used.
OSC3/OSC4 are pin shared with PC6/PC7. (depending on the OSC type
option)
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-shared with PD0/PD1/PD2/PD3 (depending
on the PWM options).
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).
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).
Timer/Event Counter 0 Schmitt trigger input (without pull-high resistor)
Timer/Event Counter 1 Schmitt trigger input (without pull-high resistor).
Timer/Event Counter 2 Schmitt trigger input (without pull-high resistor).
Schmitt trigger reset input, active low
Negative power supply, ground
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.
DD
SS
+6.0V
+0.3V
4
Storage Temperature ............................ 50 C to 125 C
Operating Temperature........................... 40 C to 85 C
I
OH
Total............................................................ 100mA
Description
2
C Bus function is used, the internal reg-
HT46RU25/HT46CU25
March 9, 2007