AT89LP4052(2008) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89LP4052
(Rev.:2008)

8-bit Microcontroller with 2/4-Kbyte Flash

Atmel Corporation 

AT89LP2052/LP4052

3. Pin Description

Pin Symbol Type Description

I RST: External Active-High Reset input.

1

RST

I VPP: Parallel Programming Voltage. Raise to 12V to enable programming.

I/O P3.0: User-configurable I/O Port 3 bit 0.

2

P3.0

I RXD: Serial Port Receiver input.

I/O P3.1: User-configurable I/O Port 3 bit 1.

3

P3.1

O TXD: Serial Port Transmitter output.

4

XTAL2

O XTAL2: Output from inverting oscillator amplifier.

5

XTAL1

I XTAL1: Input to the inverting oscillator amplifier and internal clock generation circuits.

I/O P3.2: User-configurable I/O Port 3 bit 2.

6

P3.2

I INT0: External Interrupt 0 input.

I/O P3.3: User-configurable I/O Port 3 bit 3.

7

P3.3

I INT1: External Interrupt 1input.

I/O P3.4: User-configurable I/O Port 3 bit 4.

8

P3.4

I/O T0: Timer 0 Counter input or PWM output

I/O P3.5: User-configurable I/O Port 3 bit 5.

9

P3.5

I/O T1: Timer 1 Counter input or PWM output

10

GND

I Ground

I/O P3.7: User-configurable I/O Port 3 bit 7.

11

P3.7

O SYSCLK: System Clock Output when System Clock Fuse is enabled.

I/O P1.0: User-configurable I/O Port 1 bit 0.

12

P1.0

I AIN0: Analog Comparator Positive input.

I/O P1.1: User-configurable I/O Port 1 bit 1.

13

P1.1

I AIN1: Analog Comparator Negative input.

14

P1.2

I/O P1.2: User-configurable I/O Port 1 bit 2.

15

P1.3

I/O P1.3: User-configurable I/O Port 1 bit 3

I/O P1.4: User-configurable I/O Port 1 bit 4.

16

P1.4

I SS: SPI slave select.

I/O P1.5: User-configurable I/O Port 1 bit 5.

17

P1.5

I/O

MOSI: SPI master-out/slave-in. When configured as master, this pin is an output. When configured as

slave, this pin is an input.

I/O P1.6: User-configurable I/O Port 1 bit 6.

18

P1.6

I/O

MISO: SPI master-in/slave-out. When configured as master, this pin is an input. When configured

as slave, this pin is an output.

I/O P1.7: User-configurable I/O Port 1 bit 7.

19

P1.7

I/O

SCK: SPI Clock. When configured as master, this pin is an output. When configured as slave, this pin is

an input.

20

VCC

I Supply Voltage

3

3547I–MICRO–6/08

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