(VRS550 / VRS560) Flash / MCU
Description
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VRS550 / VRS560
VERSA
Datasheet Rev 1.
1
VRS550 - 8kB Flash, 256B RAM, 25MHz, 8-Bit MCU VRS560 - 16kB Flash, 256B RAM, 25MHz, 8-Bit MCU
Datasheet Rev 1.
1
1134 Ste Catherine Street West, Suite 900, Montreal, Quebec, Canada H3B 1H4
Tel: (514) 871-2447
http://www.
goalsemi.
com
1
VRS550 / VRS560
VERSA
Datasheet Rev 1.
1
Overview
The VRS550 and the VRS560 are both low cost 8-bit microcontrollers based on the standard 80C51 microcontroller family architecture.
They are pin-to-pin compatible and drop-in replacements for most 8051 MCUs.
The VRS550 and VRS560 have 8kB and 16kB, respectively of Flash memory.
Both devices have 256 bytes of RAM memory.
The hardware features of these devices and their reprogrammability make them suitable for a wide range of applications.
These VRS550 and VRS560 are both available in PLCC-44 and QFP-44 packages in the Industrial temperature range.
The Flash memory can be programmed using programmers available from Goal Semiconductor or other 3rd party commercial programmers.
FIGURE 1: VRS550 / VRS560 FUNCTIONAL DIAGRAM
Feature Set
• • • • • • • • • • • • • • • • • • •
General 80C51/80C52 pin compatible 12 clock periods per machine cycle 8k / 16k on-chip Flash memory 256 Bytes on-chip data RAM 32 I/O lines on four 8-bit ports Full duplex serial port (UART) 3, 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 25MHz 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: VRS550 / VRS560 PLCC AND QFP PINOUT DIAGRAMS
T2EX/P1.
1
P0.
0/AD0
P0.
2/AD2
P0.
1/AD1
T2/P1.
0
8051 PROCESSOR 8k / 16k FLASH 256 bytes of RAM
ADDRESS/ DATA BUS
P1.
5 P1.
6 P1.
7 RESET RXD/P3.
0 NC TXD/P3.
1 #INT0/P3.
2 #INT1/P3.
3 T0/P3.
4 T1/P3.
5
7
...
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