VRS51C580

www.DataSheet4U.com 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 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 ...