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VRS1000

64kB Embedded ISP/IAP FLASH 1kB RAM, 40 MHz, 8-Bit MCU

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VRS1000

VERSA

Datasheet Rev 1.6

Overview

The VRS1000 is an 8-bit microcontroller with 64kB

Flash and 1kB of RAM. It includes an In-System / In-

Application Programmable (ISP/IAP) function and is

based on the architecture of the standard 80C51

microcontroller.

Each device contains a small ISP program residing in

the upper section of the Flash memory that allows In-

System Programming of the Flash memory from the

processor itself or through the UART interface.

The VRS1000’s features and powerful instruction set

make it a versatile and cost effective controller for

applications that require non volatile data storage or

that require the ability to perform its own Firmware code

update.

The on-chip Flash memory can be programmed via a

serial interface using the ISP feature. Programming of

the VRS1000 is supported by programmers available

from Goal Semiconductor or other 3rd party commercial

programmers.

The VRS1000 is available in PLCC-44 or QFP-44

packages in industrial temperature range.

FIGURE 1: VRS1000 FUNCTIONAL DIAGRAM

805 1

PROCESSOR

ADDRESS/

DATA BUS

64k x 8

FL ASH

1024 Bytes of

RAM

PORT 0

8

PORT 1

8

UART

PORT 2

8

2 INTERRUPT

INPUTS

PORT 3

8

TIMER 0

TIMER 1

TIMER 2

POW ER

CONTROL

PORT 4

4

RESET

W ATCH DOG

TIMER

PW M

5

Feature Set

• General 80C51/80C52 family compatible

• 64kB byte on-chip Flash memory

• In-System Programming (ISP) capability of Flash

• Program voltage: 5V

• 1024 bytes on chip data RAM

• Four 8-bit I/Os + one 4-bit I/O

• 5-Channel PWM on P1.3 to P1.7

• Full duplex serial port (UART)

• Three 16-bit Timers/Counters

• Watch Dog Timer

• Bit operation instruction

• 8-bit Unsigned Multiply and Division instructions

• BCD arithmetic

• Direct and Indirect Addressing

• Two Levels of Interrupt Priority and Nested Interrupts

• Power saving modes:

• Code protection function

• Low EMI (inhibit ALE)

• Industrial Temperature range (-40ºC to +85ºC)

• 5V version available

FIGURE 2: VRS1000 QFP-44 AND PLCC-44 PIN OUT DIAGRAMS

P0.3/AD3

33

34

23

22

P2.4/A12

P0.2/AD2

P0 .1/ AD1

P2.3/A11

P2.2/A10

P0.0/AD0

VDD

P4.2

T2/P1.0

VRS1000

QFP-44

P2.1/A9

P2.0/A8

P4.0

VSS

T2EX/P1.1

XTAL1

P1.2

XTAL2

PWM0/P1.3

PWM1/P1.4

44

1

#RD/P3.7

12

#WR/P3.6

11

6

PWM2/P1.5

7

PWM3/P1.6

PWM4/P1.7

RES

RXD/P3.0

P4.3

TXD/P3.1

#INT0/P3.2

#INT1/P3.3

T0/P3.4

T1/P3.5

17

18

VRS1000

PLCC-44

40

39

P0.4/AD4

P0.5/AD5

P0.6/AD6

P0.7/AD7

#EA

P4.1

ALE

#PSEN

P2.7/A15

P2.6/A14

29

28

P2.5/A13

1134 Ste Catherine Street West, Suite 900, Montreal, Quebec, Canada H3B 1H4 Tel: (514) 871-2447 http://www.goalsemi.com

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