HT46R94 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT46R94 Datasheet PDF : 62 Pages
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HT46R94
Pin Description
Pin Name
I/O
Configuration
Option
Description
PA0/BZ
PA1/BZ
PA2/TMR0
PA3/TMR1
PA4/PWM0
PA5/PWM1
PA6/PWM2
I/O
Pull-high,
Wake-up,
BZ/BZ,
PWM0~PWM2,
PFD
Bidirectional 8-bit input/output port. Each individual pin on this port can be config-
ured as a wake-up input by a configuration option. Software instructions deter-
mine if the pin is a CMOS output or Schmitt Trigger input. A configuration option
determines if all pins on the port have pull-high resistors. Pins PA0, PA1, PA2,
PA3, PA4, PA5, PA6 and PA7 are pin-shared with BZ, BZ, TMR0, TMR1, PWM0,
PWM1, PWM2 and PFD, respectively.
PA7/PFD
PB0/AN0
PB1/AN1
PB2/AN2
Bidirectional 8-bit input/output port. Software instructions determine if the pin is a
PB3/AN3
PB4/AN4
I/O
¾
CMOS output or Schmitt Trigger input. PB is pin-shared with the A/D input pins.
The A/D inputs are selected via software instructions. Once selected as an A/D in-
PB5/AN5
put, the I/O function is disabled automatically.
PB6/AN6
PB7/AN7
PC0~PC3
PC4/COM0
PC5/COM1 O
PC6/COM2
PC7/COM3
¾
8-bit CMOS output port.
PC4~PC7 can be used as COM0~COM3.
PD0/INT I/O
PD1~PD7 O
¾
8-bit CMOS output port. PD0 is pin-shared with the external interrupt input pin.
PE0~PE7 O
¾
8-bit CMOS output port.
OSC1
OSC2
OSC1, OSC2 are connected to an external RC network or external crystal, deter-
I
O
Crystal or RC
mined by configuration option, for the internal system clock. If the RC system
clock option is selected, pin OSC2 can be used to measure the system clock at
1/4 frequency.
OSC3
I
OSC4
O
¾
OSC3 and OSC4 are connected to an external 32768Hz crystal oscillator to im-
plement a system clock and real time clock.
RES
I
¾
Schmitt Trigger reset input. Active low.
VDD
¾
¾
Positive power supply
VSS
¾
¾
Negative power supply, ground
VREF
A/D Reference voltage input pin.
VDDB
VDDC
¾
¾
PB & PC port positive power supply
VSSD,
VSSE
¾
¾
PD & PE port negative power supply, ground
Note: 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.
2. As the table applies to the larger package size not all pins may exist on the smaller packages.
Rev. 1.10
3
November 5, 2008
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