VRS51C1000
Datasheet
Rev 1.9
Versa 8051 MCU with 64KB of IAP/ISP Flash
Overview
The VRS51C1000 is based on the standard 8051
microcontroller family architecture and is pin compatible
and a drop-in replacement for most 8051 MCUs.
The VRS51C1000 is ideal for a range of applications
requiring 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,
IKB of SRAM, 5 PWM output channels, a UART, three
16-bit timers, a Watchdog timer and power down
features.
The VRS51C1000 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 device also includes a fifth, 4-bit, I/O port mapped
into the “no connect” pins of the standard 8051/52
package, providing a total of 36 I/Os while maintaining
compatibility with standard 8051/82 pin outs.
The VRS51C1000 is available in PLCC-44, QFP-44
and DIP-40 packages and function over the industrial
temperature range.
F
IGURE
1: VRS51C1000 F
UNCTIONAL
D
IAGRAM
Feature Set
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8051/8052 pin compatible
64KB Flash memory
In-System / In-Application Flash Programming (ISP/IAP)
Program voltage: 5V
1024 Bytes on chip data SRAM
Four 8-bit I/Os + one 4-bit I/O
5 PWM outputs on P1.3 to P1.7
One Full Duplex UART serial port
Three 16-bit Timers/Counters
Watchdog 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)
Operating Temperature Range -40ºC to +85ºC
F
IGURE
2: VRS51C1000 QFP-44
AND
PLCC-44 P
IN OUT
D
IAGRAMS
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
#EA
#PSEN
P2.7/A15
P2.6/A14
P2.5/A13
23
22
33
P0.3/AD3
P0.2/AD2
P0.1/AD1
P0.0/AD0
VDD
P4.2
T2/P1.0
T2EX/P1.1
P1.2
PWM0/P1.3
PWM1/P1.4
34
P4.1
ALE
P2.4/A12
P2.3/A11
P2.2/A10
VRS51C1000
QFP-44
P2.1/A9
P2.0/A8
P4.0
VSS
XTAL1
XTAL2
44
1
12
11
#RD/P3.7
#WR/P3.6
PWM2/P1.5
PWM3/P1.6
PWM4/P1.7
RE
S
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
PWM1/P1.4
PWM0/P1.3
P1.2
T2EX/P1.1
64KB
FLASH
1024 Bytes of
SRAM
PORT 0
8
P0.2/AD2
VDD
P0.0/AD0
P0.1/AD1
#INT1/P3.3
PORT 1
8
PWM2/P1.5
7
6
1
P0.3/AD3
40
T2/P1.0
P4.2
T0/P3.4
T1/P3.5
8051
PROCESSOR
ADDRESS/
DATA BUS
39
UART
PORT 2
8
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
28
29
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
2 INTERRUPT
INPUTS
TIMER 0
TIMER 1
TIMER 2
RESET
POWER
CONTROL
WATCHDOG
TIMER
PORT 3
8
VRS51C1000
PLCC-44
PORT 4
4
P2.1/A9
P2.2/A10
P2.3/A11
XTAL1
P2.0/A8
#WR/P3.6
#RD/P3.7
XTAL2
PWM
5
Ramtron International Corporation
1850 Ramtron Drive Colorado Springs
Colorado, USA, 80921
♦
♦
♦
http://www.ramtron.com
MCU customer service: 1-800-943-4625, 1-514-871-2447 x 208
1-800-545-FRAM, 1-719-481-7000
P2.4/A12
VSS
P4.0
page 1 of 48
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
