VRS51X570 Datasheet, PDF (1/49 Pages) List of Unclassifed Manufacturers – Versa 8051 MCUs with 32/64KB

VRS51x570/580
Datasheet
Rev 1.2
Versa 8051 MCUs with 32/64KB
Overview
The VRS51x570 and the VRS51x580 are low cost 8-bit
microcontrollers based on the standard 80C51
microcontroller family architecture. They are pin
compatible and drop-in replacements for most 8051
MCUs.
Ideal for a wide range of applications requiring large
amounts of program/data memory, coupled with
comprehensive peripheral support, the VRS51x570/580
devices include 32KB/64KB of Flash memory,
respectively, and 1KB of SRAM, 5 PWM output
channels, a UART, three 16-bit timers, a Watch Dog
timer and power down features.
These devices also include a fifth, 4-bit, I/O port mapped
into the “no connect” pins of the standard 8051/52
package. This provides a total of 36 I/Os while
maintaining compatibility with standard 80C51/52 pin
outs.
The VRS51x570 and VRS51x580 are available in
PLCC-44, QFP-44 and DIP-40 packages in the Industrial
temperature range. The Flash memory can be
programmed using programmers from Ramtron or other
3^rd party commercial programmer suppliers.
FIGURE 1: VRS51X570 / VRS51X580 FUNCTIONAL DIAGRAM
8051
PROCESSOR
ADDRESS/
DATA BUS
64KB
FLASH
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
POWER
CONTROL
PORT 4
4
RESET
WATCHDOG
TIMER
PWM
5
Feature Set
• 80C51/80C52 pin compatible
• 12 clock periods per machine cycle
• 32KB / 64KB on-chip Flash memory
• 1024 Bytes on-chip data RAM
• 36 I/O lines: P0-P3 = 8-bit, P4 = 4-bit
• 5-Channel PWM on P1.3 to P1.7
• Full duplex serial port (UART)
• Three 16-bit Timers/Counters
• Watch Dog Timer
• 8-bit Unsigned Division / Multiply
• BCD arithmetic
• Direct and Indirect Addressing
• Two levels of interrupt priority and nested interrupts
• Power saving modes
• Code protection function
• Operates at a clock frequency of up to 40MHz
• Low EMI (inhibit ALE)
• Programming voltage: 12V
• Industrial Temperature range (-40°C to +85°C)
• 5V and 3V versions available (see Ordering information.)
FIGURE 2: VRS51X570 / VRS51X580 PLCC AND QFP PINOUT DIAGRAMS
PWM2/P1.5
PWM3/P1.6
PWM4/P1.7
RESET
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
6
7
1
40
39
VRS51x570/580
PLCC -4 4
17
29
18
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
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
33
34
23
22
VRS51x570/580
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
Ramtron International Corporation ? http://www.ramtron.com
1850 Ramtron Drive Colorado Springs ? MCU customer service: 1-800-943-4625, 1-514-871-2447, ext. 208
Colorado, USA, 80921 ? 1-800-545-FRAM, 1-719-481-7000
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