HT46R48AE データシートの表示（PDF） - Holtek Semiconductor

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HT46R48AE

Cost-Effective A/D Type 8-Bit MCU

Holtek Semiconductor 

HT46R46E/C46E/R47E/C47E/R48AE/C48AE/R49E

HT46R48AE

Pin Name

PA0~PA2

PA3/PFD

PA4/TMR

PA5/INT

PA6~PA7

PB0/AN0

PB1/AN1

PB2/AN2

PB3/AN3

PB4~PB7

PC0/SDA

PC1/SCL

PD0/PWM

OSC1

OSC2

RES

VDD

VSS

I/O

Configuration

Option

Description

Bidirectional 8-bit input/output port. Each individual pin on this port can be

Pull-high configured as a wake-up input by a configuration option. Software instruc-

I/O Wake-up tions determine if the pin is a CMOS output or Schmitt Trigger input. Configu-

PA3 or PFD ration options determine which pins on the port have pull-high resistors. Pins

PA3, PA4 and PA5 are pin-shared with PFD, TMR and INT, respectively.

Bidirectional 8-bit input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input. Configuration options determine

I/O

Pull-high

which pins on the port have pull-high resistors. PB is pin-shared with the A/D

input pins. The A/D inputs are selected via software instructions. Once se-

lected as an A/D input, the I/O function and pull-high resistor options are dis-

abled automatically.

Bidirectional 2-bit input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input.

I/O Pull-high Configuration options determine which pins on the port have pull-high resis-

tors. Pins SDA and SCL of the EEPROM are internally connected to pins PC0

and PC1, respectively.

Bidirectional 1-bit input/output port. Software instructions determine if the pin

I/O

Pull-high

I/O or PWM

is a CMOS output or Schmitt Trigger input. Configuration option determines if

this pin has a pull-high resistor. The PWM output is pin-shared with pin PD0

selected via a configuration option.

OSC1, OSC2 are connected to an external RC network or external crystal,

I

O

Crystal or RC

determined by configuration option, for the internal system clock. If the RC

system clock option is selected, pin OSC2 can be used to measure the sys-

tem clock at 1/4 frequency.

I

¾

Schmitt Trigger reset input. Active low.

¾

¾

Positive power supply

¾

¾

Negative power supply, ground

Note:

1. Each pin on PA can be programmed through a configuration option to have a wake-up function.

2. Individual pins can be selected to have a pull-high resistor.

3. Pins PB4~PB7 exist but are not bonded out on the 20-pin package.

4. Unbonded pins should be setup as outputs or as inputs with pull-high resistors to conserve power.

HT46R49E

Pin Name

PA0~PA2

PA3/PFD

PA4/TMR

PA5/INT

PA6~PA7

PB0/AN0

PB1/AN1

PB2/AN2

PB3/AN3

PB4~PB7

PC0/SDA

PC1/SCL

PC2~PC4

I/O

Configuration

Option

Description

Bidirectional 8-bit input/output port. Each individual pin on this port can be

Pull-high configured as a wake-up input by a configuration option. Software instruc-

I/O Wake-up tions determine if the pin is a CMOS output or Schmitt Trigger input. Configu-

PA3 or PFD ration options determine which pins on the port have pull-high resistors. Pins

PA3, PA4 and PA5 are pin-shared with PFD, TMR and INT, respectively.

Bidirectional 8-bit input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input. Configuration options determine

I/O

Pull-high

which pins on the port have pull-high resistors. PB is pin-shared with the A/D

input pins. The A/D inputs are selected via software instructions. Once se-

lected as an A/D input, the I/O function and pull-high resistor options are dis-

abled automatically.

Bidirectional 5-bit input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input.

I/O Pull-high Configuration options determine which pins on the port have pull-high resis-

tors. Pins SDA and SCL of the EEPROM are internally connected to pins PC0

and PC1, respectively.

Rev. 1.20

4

August 15, 2007

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