AT90PWM2B-16SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

Figure 25-1. Parallel Programming

RDY/BSY

OE

WR

BS1

XA0

XA1

PAGEL

+ 12 V

BS2

PD1

PD2

PD3

PD4

PD5

PD6

PD7

RESET

PE2

XTAL1

GND

AT90PWM2/3/2B/3B

+ 5V

VCC

+ 5V

AVCC

PB[7:0]

DATA

Table 25-7. Pin Name Mapping

Signal Name in

Programming Mode

Pin Name

RDY/BSY

PD1

OE

PD2

WR

PD3

BS1

PD4

XA0

PD5

XA1

PD6

PAGEL

PD7

BS2

PE2

DATA

PB[7:0]

I/O Function

O

0: Device is busy programming, 1: Device is

ready for new command

I Output Enable (Active low)

I Write Pulse (Active low)

I

Byte Select 1 (“0” selects Low byte, “1” selects

High byte)

I XTAL Action Bit 0

I XTAL Action Bit 1

I

Program memory and EEPROM Data Page

Load

I

Byte Select 2 (“0” selects Low byte, “1” selects

2’nd High byte)

I/O

Bi-directional Data bus (Output when OE is

low)

Table 25-8. Pin Values Used to Enter Programming Mode

Pin

Symbol

PAGEL

Prog_enable[3]

XA1

Prog_enable[2]

XA0

Prog_enable[1]

BS1

Prog_enable[0]

Value

0

0

0

0

4317K–AVR–03/2013

285

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