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Ramtron
Ramtron

VRS51C570 Datasheet Preview

VRS51C570 Datasheet

(VRS51X570 / VRS51X580) Versa 8051 MCUs

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VRS51C570 pdf
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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
3rd party commercial programmer suppliers.
FIGURE 1: VRS51X570 / VRS51X580 FUNCTIONAL DIAGRAM
64KB
FLASH
1024 Bytes of
RAM
UART
2 INTERRUPT
INPUTS
TIMER 0
TIMER 1
TIMER 2
RESET
8051
PROCESSOR
ADDRESS/
DATA BUS
PORT 0
PORT 1
PORT 2
PORT 3
POWER
CONTROL
WATCHDOG
TIMER
PORT 4
PWM
8
8
8
8
4
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
page 1 of 49



Ramtron
Ramtron

VRS51C570 Datasheet Preview

VRS51C570 Datasheet

(VRS51X570 / VRS51X580) Versa 8051 MCUs

No Preview Available !

VRS51C570 pdf
VRS51x570/580
Pin Descriptions for QFP-44
TABLE 1: PIN DESCRIPTIONS FOR QFP-44/
QFP
- 44
Name
1
PWM2
P1.5
2
PWM3
P1.6
3
PWM4
P1.7
4 RES
5
RXD
P3.0
6 P4.3
7
TXD
P3.1
8
#INT0
P3.2
9
#INT1
P3.3
10
T0
P3.4
11
T1
P3.5
12
#WR
P3.6
13
#RD
P3.7
14 XTAL2
15 XTAL1
16 VSS
17 P4.0
18
P2.0
A8
19
P2.1
A9
20
P2.2
A10
21
P2.3
A11
22 P2.4
A12
23
P2.5
A13
I/O Function
O PWM Channel 2
I/O Bit 5 of Port 1
O PWM Channel 3
I/O Bit 6 of Port 1
O PWM Channel 4
I/O Bit 7 of Port 1
I Reset
I Receive Data
I/O Bit 0 of Port 3
I/O Bit 3 of Port 4
O Transmit Data &
I/O Bit 1 of Port 3
I External Interrupt 0
I/O Bit 2 of Port 3
I External Interrupt 1
I/O Bit 3 of Port 3
I Timer 0
I/O Bit 4 of Port 3
I Timer 1 & 3
I/O Bit 5 of Port
O Ext. Memory Write
I/O Bit 6 of Port 3
O Ext. Memory Read
I/O Bit 7 of Port 3
O Oscillator/Crystal Output
I Oscillator/Crystal In
- Ground
I/O Bit 0 of Port 4
I/O Bit 0 of Port 2
O Bit 8 of External Memory Address
I/O Bit 1 of Port 2
O Bit 9 of External Memory Address
I/O Bit 2 of Port 2
O Bit 10 of External Memory Address
I/O Bit 3 of Port 2 &
O Bit 11 of External Memory Address
I/O Bit 4 of Port 2
O Bit 12 of External Memory Address
I/O Bit 5 of Port 2
O Bit 13 of External Memory Address
QFP
- 44
Name
24
P2.6
A14
25
P2.7
A15
26 #PSEN
27 ALE
28 P4.1
29 #EA
30
P0.7
AD7
31
P0.6
AD6
32
P0.5
AD5
33
P0.4
AD4
34
P0.3
AD3
35
P0.2
AD2
36
P0. 1
AD1
37
P0.0
AD0
38 VDD
39 P4.2
40
T2
P1.0
41
T2EX
P1.1
42 P1.2
PWM0
43
P1.3
PWM1
44
P1.4
I/O
I/O
O
I/O
O
O
O
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
-
I/O
I
I/O
I
I/O
I/O
O
I/O
O
I/O
Function
Bit 6 of Port 2
Bit 14 of External Memory Address
Bit 7 of Port 2
Bit 15 of External Memory Address
Program Store Enable
Address Latch Enable
Bit 1 of Port 4
External Access
Bit 7 Of Port 0
Data/Address Bit 7 of External Memory
Bit 6 of Port 0
Data/Address Bit 6 of External Memory
Bit 5 of Port 0
Data/Address Bit 5 of External Memory
Bit 4 of Port 0
Data/Address Bit 4 of External Memory
Bit 3 Of Port 0
Data/Address Bit 3 of External Memory
Bit 2 of Port 0
Data/Address Bit 2 of External Memory
Bit 1 of Port 0 & Data
Address Bit 1 of External Memory
Bit 0 Of Port 0 & Data
Address Bit 0 of External Memory
VCC
Bit 2 of Port 4
Timer 2 Clock Out
Bit 0 of Port 1
Timer 2 Control
Bit 1 of Port 1
Bit 2 of Port 1
PWM Channel 0
Bit 3 of Port 1
PWM Channel 1
Bit 4 of Port 1
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
________________________________________________________________________________________________
www.ramtron.com
page 2 of 49


Part Number VRS51C570
Description (VRS51X570 / VRS51X580) Versa 8051 MCUs
Maker Ramtron
Total Page 30 Pages
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