VRS51L1050-25-LG-ISPV3 Просмотр технического описания (PDF) - Ramtron International Corporation

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VRS51L1050-25-LG-ISPV3

Versa 8051 3.3V MCU with 64KB of IAP/ISP Flash

Ramtron International Corporation 

VRS51L1050

Preliminary Datasheet

Rev 1.2

Versa 8051 3.3V MCU with 64KB of IAP/ISP Flash

Overview

The VRS51L1050 is based on the standard 8051

microcontroller family architecture and is a pin

compatible drop-in replacement for most 8051 MCUs.

The VRS51L1050 is designed for applications that

require a large amount of program/data memory with

non-volatile data storage and/or code/field based

firmware upgrade capability coupled with

comprehensive peripheral support. It features 64KB of

In-System/In-Application Programmable Flash memory,

1KB of SRAM, an I²C-compatible interface, 2 PWM

output channels, a UART, three 16-bit timers and the

ability to exit the power down mode upon assertion of

an external interrupt (INT0 / INT1).

Ideal for battery-powered applications, the

VRS51L1050 registers and I/Os maintain their current

value in power down mode while the oscillator is

disabled, enabling the supply current to drop below

20uA.

The VRS51L1050 is available with firmware that

enables In-System Programming (firmware based boot-

loader) of the Flash memory via the UART interface

(ISPVx version). General Flash memory programming

is supported by device programmers available from

Ramtron or other 3rd party suppliers.

The VRS51L1050 is available in PLCC-44, QFP-44 and

DIP-40 packages and functions over the commercial

temperature range.

FIGURE 1: VRS51L1050 FUNCTIONAL DIAGRAM

64KB

FLASH

8051

PROCESSOR

ADDRESS/

DATA BUS

1024 Bytes of

SRAM

PORT 0

8

Feature Set

• 8051/8052 pin compatible

• 64KB on-chip Flash memory

• In-System/In-Application Flash Programming (ISP/IAP)

• On-chip Charge Pump for Flash Programming

• 1024 Bytes on-chip Data SRAM

• Four 8-bit I/O Ports, one 4-bit I/O Port

• 2 PWM Outputs on P1.2 to P1.3 (8/5-bit resolution)

• 1 Full Duplex UART Serial Port

• I²C-compatible Interface

• Three 16-bit Timers/Counters

• Bit Operation Instruction

• 8-bit Unsigned Division and Multiply

• BCD Arithmetic

• Direct and Indirect Addressing

• 7 Interrupt Sources and 2 Levels of Interrupt Priority

• Power saving modes

• Wakeup from Power Down by Ext. Interrupt or Reset

• Code protection function

• Low EMI (inhibit ALE)

• Commercial Temperature Range (0°C to +70°C)

• 3.3V Operating Voltage

FIGURE 2: VRS51L1050 QFP-44 AND PLCC-44 PIN OUT DIAGRAMS

P0.3/AD3

P0.2/AD2

P0.1/AD1

P0.0/AD0

VDD

P4.2

T2/P1.0

T2EX/P1.1

PWM0/P1.2

PWM1/P1.3

P1.4

33

34

23

22

VRS51L1050

QFP-44

44

12

1

11

P2.4/A12

P2.3/A11

P2.2/A10

P2.1/A9

P2.0/A8

P4.0

VSS

XTAL1

XTAL2

#RD/P3.7

#WR/P3.6

I2C

UART

2 INTERRUPT

INPUTS

TIMER 0

TIMER 1

TIMER 2

RESET

POWER

CONTROL

PORT 1

8

PORT 2

8

PORT 3

8

PORT 4

4

PWM

2

6

P1.5

7

SCL/P1.6

SDA/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

1

40

39

VRS51L1050

PLCC-44

29

28

P0.4/AD4

P0.5/AD5

P0.6/AD6

P0.7/AD7

#EA

P4.1

ALE

#PSEN

P2.7/A15

P2.6/A14

P2.5/A13

Ramtron International Corporation ♦ http://www.ramtron.com

1850 Ramtron Drive Colorado Springs ♦ MCU customer service: 1-800-943-4625, 1-514-871-2447 x 208

Colorado, USA, 80921 ♦ 1-800-545-FRAM, 1-719-481-7000

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