Microchip AT89C51CC01CA-RLTUM, 8bit 80C51 Microcontroller, AT89C51, 40MHz, 32 kB Flash, 44-Pin VQFP

First member of the Microchip CAN family of 8-bit microcontrollers for CAN network applications. It provides 32KB of flash memory including ISP, 2KB of boot flash memory, 2KB of EEPROM, and 1.2KB of RAM. In X2 mode a maximum external clock rate of 20MHz reaches a 300ns cycle time. Special attention is paid to reducing its electro-magnetic emissions.

80C51 Core Architecture
256 Bytes of On-chip RAM
1K Bytes of On-chip XRAM
32K Bytes of On-chip Flash Memory
Data Retention: 10 Years at 85°C
Erase/Write Cycle: 100K
Boot Code Section with Independent Lock Bits
2K Bytes of On-chip Flash for Bootloader
In-System Programming by On-Chip Boot Program (CAN, UART) and IAP Capability
2K Bytes of On-chip EEPROM
Erase/Write Cycle: 100K
14-sources 4-level Interrupts
Three 16-bit Timers/Counters
Full Duplex UART Compatible 80C51
Maximum Crystal Frequency 40MHz, in X2 Mode, 20MHz (CPU Core, 20MHz)
Five Ports: 32 + 2 Digital I/O Lines
Five-channel 16-bit PCA with:
PWM (8-bit)