UPSD3253B-40 データシートの表示（PDF） - STMicroelectronics

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UPSD3253B-40

Flash Programmable System Devices with 8032 Microcontroller Core and 256Kbit SRAM

STMicroelectronics 

µPSD325X DEVICES

Port Pin

P4.3

P4.4

P4.5

P4.6

P4.7

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

Signal

Name

Pin No.

In/Out

Basic

Function

Alternate

PWM0

27

I/O General I/O port pin

8-bit Pulse Width Modulation

output 0

PWM1

25

I/O General I/O port pin

8-bit Pulse Width Modulation

output 1

PWM2

23

I/O General I/O port pin

8-bit Pulse Width Modulation

output 2

PWM3

19

I/O General I/O port pin

8-bit Pulse Width Modulation

output 3

PWM4

18

I/O General I/O port pin

Programmable 8-bit Pulse Width

modulation output 4

USB-

8

USB Pin Pull-up resistor required

I/O

(2kΩ for 3V devices, 7.5kΩ for 5V

devices) for all devices, with or

without USB function.

USB+

10

I/O USB Pin

AVREF 70

O Reference Voltage input for ADC

RD_

65

O READ signal, external bus

WR_

62

O WRITE signal, external bus

PSEN_ 63

O PSEN signal, external bus

ALE

4

O Address Latch signal, external bus

RESET_ 68

I Active low RESET input

XTAL1

48

I Oscillator input pin for system clock

XTAL2

49

O Oscillator output pin for system clock

35

I/O General I/O port pin

34

I/O General I/O port pin

32

I/O General I/O port pin

28

I/O General I/O port pin

26

I/O General I/O port pin

24

I/O General I/O port pin

1. PLD Macro-cell outputs

2. PLD inputs

3. Latched Address Out (A0-A7)

4. Peripheral I/O Mode

22

I/O General I/O port pin

21

I/O General I/O port pin

15/176

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