ST7FLITE20(2003) 查看數據表（PDF） - STMicroelectronics

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ST7FLITE20
(Rev.:2003)

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI

STMicroelectronics 

ST7LITE2

PIN DESCRIPTION (Cont’d)

Legend / Abbreviations for Table 1:

Type:

I = input, O = output, S = supply

In/Output level: CT= CMOS 0.3VDD/0.7VDD with input trigger

Output level: HS = 20mA high sink (on N-buffer only)

Port and control configuration:

– Input:

float = floating, wpu = weak pull-up, int = interrupt, ana = analog

– Output: OD = open drain, PP = push-pull

The RESET configuration of each pin is shown in bold which is valid as long as the device is in reset state.

Table 1. Device Pin Description

Pin No.

Level

Pin Name

Port / Control

Input

Main

Output Function

(after reset)

Alternate Function

1 16 VSS

S

2 17 VDD

S

3 18 RESET

I/O CT

X

4 19 PB0/AIN0/SS

I/O CT

X

ei3

5 20 PB1/AIN1/SCK I/O CT X

6 1 PB2/AIN2/MISO I/O CT X

7 2 PB3/AIN3/MOSI I/O CT X

8 3 PB4/AIN4/CLKIN I/O CT

X

ei2

9 4 PB5/AIN5

10 5 PB6/AIN6

11 6 PA7

I/O CT

X

I/O CT

X

I/O CT HS X ei1

12

7

PA6 /MCO/

ICCCLK/BREAK

I/O

CT

X

ei1

Ground

Main power supply

X

Top priority non maskable interrupt (active

low)

X X X Port B0

ADC Analog Input 0 or SPI

Slave Select (active low)

X X X Port B1

ADC Analog Input 1 or SPI Se-

rial Clock

X X X Port B2

ADC Analog Input 2 or SPI

Master In/ Slave Out Data

X X X Port B3

ADC Analog Input 3 or SPI

Master Out / Slave In Data

X X X Port B4

ADC Analog Input 4 or Exter-

nal clock input

X X X Port B5 ADC Analog Input 5

X X X Port B6 ADC Analog Input 6

X X Port A7

X X Port A6

Main Clock Output or In Circuit

Communication Clock or Ex-

ternal BREAK

Caution: During reset, this pin

must be held at high level to

avoid entering ICC mode un-

expectedly (this is guaranteed

by the internal pull-up if the ap-

plication leaves the pin float-

ing).

7/131

1

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