Ramtron VRS51C540
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 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.| Part No. | VRS51C540 |
|---|---|
| Datasheet | VRS51C540 Download |
| Manufacturer |  Ramtron |
| Description | Versa 8051 MCU |
| Buy | Stock & Price |
VRS51x540 Datasheet Rev 1.2 Versa 8051 MCU with 4KB Flash Overview 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. FIGURE 1: VRS51X540 FUNCTIONAL DIAGRAM P1.2 T2EX/P1.1 Feature Set
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● 80C51/80C52 pin compatible 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) 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 DIAGR...
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● 80C51/80C52 pin compatible 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) 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 DIAGR...
