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VRS51L540-40-P

更新时间： 2024-11-13 07:05:47
品牌 Logo 应用领域
其他 - ETC /
页数 文件大小 规格书
40页 1714K
描述
Versa 8051 MCU with 4KB Flash

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VRS51L540-40-P 数据手册

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VRS51x540  
Datasheet  
Rev 1.2  
Versa 8051 MCU with 4KB Flash  
Overview  
Feature Set  
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80C51/80C52 pin compatible  
The VRS51x540 is a low cost 8-bit microcontroller  
based on the standard 80C51 microcontroller family  
architecture. It is pin compatible and is a drop-in  
replacement for standard 8051 MCUs  
12 clock periods per machine cycle  
4KB on-chip Flash memory  
128 bytes on-chip data RAM  
32 I/O lines: P0-P3 = 8-bit  
Full duplex serial port (UART)  
3, 16-bit Timers/Counters  
Watchdog 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)  
Aimed at cost effective applications requiring small  
amounts of program/data memory coupled with  
streamlined peripheral support, the VRS51x540 includes  
4KB of Flash memory, 128 bytes of RAM a UART, three  
16-bit timers, a Watchdog timer and power down  
features.  
The VRS51x540 is available in 5 (VRS51C540) and 3.3  
(VRS51L540) volt versions in PLCC-44, QFP-44 and  
DIP-40 packages. The VRS51x540 devices operate  
over the entire industrial temperature range. The Flash  
memory can be programmed using programmers  
available from Ramtron or other 3rd party commercial  
programmers.  
Programming voltage: 12V  
Industrial Temperature range (-40°C to +85°C)  
5V and 3V versions available (see ordering information.)  
FIGURE 2: VRS51X540 PLCC AND QFP PINOUT DIAGRAMS  
FIGURE 1: VRS51X540 FUNCTIONAL DIAGRAM  
6
40  
7
1
P1.5  
P1.6  
39  
P0.4/AD4  
P0.5/AD5  
P0.6/AD6  
P0.7/AD7  
#EA  
8051  
PROCESSOR  
ADDRESS/  
DATA BUS  
P1.7  
RESET  
RXD/P3.0  
NC  
VRS51x540  
PLCC-44  
NC  
4KB  
FLASH  
ALE  
TXD/P3.1  
#INT0/P3.2  
#INT1/P3.3  
PORT 0  
8
8
8
8
#PSEN  
P2.7/A15  
P2.6/A14  
P2.5/A13  
T0/P3.4  
T1/P3.5  
17  
18  
29  
128 Bytes of  
RAM  
28  
PORT 1  
PORT 2  
PORT 3  
UART  
2 INTERRUPT  
INPUTS  
TIMER 0  
TIMER 1  
TIMER 2  
3
3
2
3
3
4
2
2
P0.3/AD3  
P2.4/A12  
POWER  
CONTROL  
P0.2/AD2  
P0.1/AD1  
P0.0/AD0  
VDD  
P2.3/A11  
P2.2/A10  
P2.1/A9  
P2.0/A8  
NC  
VRS51x540  
QFP-44  
WATCHDOG  
TIMER  
NC  
RESET  
T2/P1.0  
T2EX/P1.1  
P1.2  
VSS  
XTAL1  
XTAL2  
P1.3  
#RD/P3.7  
#WR/P3.6  
4
4
1
2
P1.4  
1
1
1
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, ext. 208  
1-800-545-FRAM, 1-719-481-7000  
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