VRS51L2070 pdf datasheet (High

The VRS51L2070 is a high performance, 8051-based microcontroller
coupled with a fully integrated array of peripherals for addressing a
broad range of embedded design applications.
Based on a powerful 40-MIPS, single-cycle, 8051 microprocessor,
the VRS51L2070’s memory sub-system features 64KB of Flash
and 4352 bytes of SRAM.
Support peripherals include a hardware based arithmetic unit
capable of performing complex mathematical operations, JTAG
interface used for Flash programming and non-intrusive in-circuit
debugging/emulation, a precision internal oscillator (2% accuracy)
and a watchdog timer.
Communication and control of external devices is facilitated via an
assortment of digital peripherals such as an enhanced, fully
configurable SPI bus, an I2C interface, dual UARTs with dedicated
baud rate generators, 8 PWM controllers, 3 16-bit timers and 2 pulse
width counter modules.
The VRS51L2070 is powered by a 3.3 volt supply, can function
over the industrial temperature range, and is available in a
QFP-64 package (See VRS51L2170 datasheet for PLCC/QFP-44
packages - pin compatible with the industry standard 8051
microcontroller footprint/pin-out).