HT48C30-1 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT48C30-1

I/O Type 8-Bit MCU

Holtek Semiconductor 

HT48R30A-1/HT48C30-1

Pin Description

Pin Name I/O

Options

Description

PA0~PA7

Pull-high*

Bidirectional 8-bit input/output port. Each bit can be configured as a

I/O

Wake-up

CMOS/Schmitt trigger

wake-up input by options. Software instructions determine the CMOS

output or Schmitt trigger or CMOS input (depends on an options) with

Input

pull-high resistor (determined by 1-bit pull-high options).

PB0/BZ

PB1/BZ

I/O

PB2~PB7

Pull-high*

PB0 or BZ

PB1 or BZ

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

CMOS output or Schmitt trigger input with pull-high resistor (deter-

mined by pull-high options).

The PB0 and PB1 are pin-shared with the BZ and BZ, respectively.

Once the PB0 or PB1 is selected as buzzer driving outputs, the output

signals come from an internal PFD generator (shared with timer/event

counter).

VSS

¾

¾

Negative power supply, ground

PG0/INT I/O

Pull-high*

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by 1-bit

pull-high options). This external interrupt input is pin-shared with PG0.

The external interrupt input is activated on a high to low transition.

PC0/TMR

PC1~PC5

I/O

Pull-high*

Bidirectional I/O lines. Software instructions determine the CMOS out-

put or Schmitt trigger input with pull-high resistor (determined by 1-bit

pull-high options). The timer input are pin-shared with PC0.

RES

I

¾

Schmitt trigger reset input. Active low

VDD

¾

¾

Positive power supply

OSC1/PG1 I

OSC2/PG2 O

Pull-high*

Crystal or RC

or Int. RC+I/O

or Int. RC+RTC

OSC1, OSC2 are connected to an RC network or Crystal (determined

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 can

also be optioned as an RTC oscillator (32768Hz) or I/O lines. In these

two cases, the system clock comes from an internal RC oscillator

whose frequency has 4 options (3.2MHz, 1.6MHz, 800kHz, 400kHz). If

the I/O option is selected, the pull-high options can also be enabled or

disabled. Otherwise the PG1 and PG2 are used as internal registers

(pull-high resistors are always disabled).

Note: ²*² The pull-high resistors of each I/O port (PA, PB, PC, PG) are controlled by 1-bit option.

Or Schmitt trigger option of port A is controlled by 1-bit option.

Absolute Maximum Ratings

Supply Voltage ...........................VSS-0.3V to VSS+6.0V

Input Voltage..............................VSS-0.3V to VDD+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. 2.00

3

April 24, 2009

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