P89CV51RC2

P89CV51RB2/RC2/RD2 8-bit 80C51 5 V low power 64 kB flash microcontroller with 1 kB RAM, SPI, 6-clock CPU with 6/12-clock peripherals Rev. 03 — 25 August 2009 Product data sheet 1. General description The P89CV51RB2/RC2/RD2 are three types of 80C51 microcontroller with respectively 16 kB/32 kB/64 kB flash and 1 kB of data RAM. These devices are designed to be drop-in and software-compatible replacements for the popular P89C51RB2/RC2/RD2 devices. Both the In-System Programming (ISP) and In-Application Programming (IAP) boot codes are upward compatible. Additional features of the P89CV51RB2/RC2/RD2 devices compared to the P89C51RB2/RC2/RD2 are the inclusion of an SPI interface, larger RAM size, and the ability to erase code memory in 128-B page blocks. The IAP capability combined with the 128-B page size allows for efficient use of the code memory for non-volatile data storage. 2. Features 2.1 Principal features I Supports 12-clock (default) or 6-clock mode selection via ISP or parallel programmer I 6-clock/12-clock mode programmable “on-the-fly” by an SFR bit I Peripherals (PCA, timers, UART) may use either 6-clock or 12-clock mode while the CPU is in 6-clock mode I 128-B page erase for efficient use of code memory as non-volatile data storage I 0 MHz to 40 MHz operating frequency in 12× mode, 20 MHz in 6× mode I 16/32/64 kB of on-chip flash user-code memory with ISP and IAP I 1 kB RAM I SPI (Serial Peripheral Interface) and enhanced UART I PCA (Programmable Counter Array) with P...