ST62T18C datasheet(7/82 Pages) STMICROELECTRONICS

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ST62T18C/E18C

1.2 PIN DESCRIPTIONS

VDD and VSS. Power is supplied to the MCU via

these two pins. VDD is the power connection and

VSS is the ground connection.

OSCin and OSCout. These pins are internally

connected to the on-chip oscillator circuit. A quartz

crystal, a ceramic resonator or an external clock

signal can be connected between these two pins.

The OSCin pin is the input pin, the OSCout pin is

the output pin.

RESET. The active-low RESET pin is used to re-

start the microcontroller.

TEST/V

PP. The TEST must be held at VSS for nor-

mal operation. If TEST pin is connected to a

+12.5V level during the reset phase, the EPROM/

OTP programming Mode is entered.

NMI. The NMI pin provides the capability for asyn-

chronous interruption, by applying an external non

maskable interrupt to the MCU. The NMI input is

falling edge sensitive with Schmitt trigger charac-

teristics. The user can select as option the availa-

bility of an on-chip pull-up at this pin.

PA1-PA5. These 5 lines are organised as one I/O

port (A). Each line may be configured under soft-

ware control as inputs with or without internal pull-

up resistors, input with interrupt generation and

pull-up resistor, open-drain or push-pull outputs.

PA3/ARTIMout and PA4/ARTIMin can be used re-

spectively as output and input pins for the embed-

ded 8-bit Auto-Reload Timer.

In addition, PA1-PA5 can sink 20mA for direct LED

or TRIAC drive.

PB4...PB6. These 3 lines are organised as one I/O

port (B). Each line may be configured under soft-

ware control as inputs with or without internal pull-

up resistors, input with interrupt generation and

pull-up resistor, open-drain or push-pull outputs,

analog inputs for the A/D converter.

PD4...PD7. These 4 lines are organised as one I/O

port (portD). Each line may be configured under

software control as input with or without internal

pull-up resistor, input with interrupt generation and

pull-up resistor, analog input open-drain or push-

pull output. In addition, the pins PD5/TXD1 and

PD4/RXD1 can be used as UART output (PD5/

TXD1) or UART input (PD4/RXD1).

TIMER. This is the TIMER 1 I/O pin. In input mode,

it is connected to the prescaler and acts as ex-

ternal timer clock or as control gate for the internal

timer clock. In output mode, the TIMER pin outputs

the data bit when a time-out occurs.The user can

select as option the availability of an on-chip pull-

up at this pin.

ST62T18C 数据表(PDF) 7 Page - STMicroelectronics

ST62T18C 数据表(HTML) 7 Page - STMicroelectronics

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