ST6228CM3 查看數據表（PDF） - STMicroelectronics

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ST6228CM3

8-BIT MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, UART, OSG, SAFE RESET AND 28-PIN PACKAGE

STMicroelectronics 

ST62T28C/E28C

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/VPP. 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. Schmitt trigger

characteristics. The user can select as option the

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

PA0-PA5. These 6 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.

PA2/ARTIMout and PA3/ARTIMin can be used re-

spectively as output and input pins for the embed-

ded 8-bit Auto-Reload Timer.

In addition, PA0-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.

PC4-PC7. These 4 lines are organised as one I/O

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

ware control as input with or without internal pull-

up resistor, input with interrupt generation and

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

PC4 and PC5 can also be used as analog input for

the A/D converter, while PC6 and PC7 can sink

20mA for direct LED or TRIAC drive.

PD1...PD7. These 7 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). The pins PD3/

Sout, PD2/Sin and PD3/Scl can also be used re-

spectively as data out, data in and clock pins for

the on-chip SPI.

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.

Figure 2. ST62T28C/E28C Pin Configuration

VDD 1

TIMER 2

OSCin 3

OSCout 4

NMI 5

PC7* 6

PC6* 7

Ain/PC5 8

Ain/PC4 9

TEST/VPP(1) 10

RESET 11

Ain/PB6 12

Ain/PB5 13

Ain/PB4 14

(1) V on EPROM/OTP only

PP

(*) 20 mA Sink

28 VSS

27 PA0*

26 PA1*

25 PA2*/ARTIMout

24 PA3*/ARTIMin

23 PA4*

22 PA5*

21 PD1/Ain/Scl

20 PD2/Ain/Sin

19 PD3/Ain/Sout

18 PD4/Ain/RXD1

17 PD5/Ain/TXD1

16 PD6/Ain

15 PD7/Ain

VR01804B

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