CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

ROM-less Version for 90C52

Features

• Fully compatible to standard MCS-51 microcontroller

• Versions for 40/50 MHz operating frequency

• Low voltage version for 24MHz operating frequency

• 256 bytes of on-chip data RAM

• 64K external program memory space

• 64K external data memory space

• Four 8-bit ports

• Three 16-bit Timers/Counters (Timer 2 with up/down counter feature)

• USART

• Six interrupt sources, two priority levels

• Power saving Idle and power down mode

• 2.7Volt low voltage version available

• P-DIP-40, P-LCC-44, P-MQFP-44 package