Preliminary

• Fully compatible to standard 8051 microcontroller

• Versions for 12/24/40 MHz operating frequency

• Program memory :

completely external (C501-L)

8K × 8 ROM (C501-1R)

8K × 8 OTP memory (C501-1E)

• 256 × 8 RAM

• 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 modes

• Quick Pulse programming algorithm (C501-1E only)

• 2-Level program memory lock (C501-1E only)

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

• Temperature ranges :

SAB-C501 TA : 0 ˚C to 70 ˚C

SAF-C501 TA : – 40 ˚C to 85 ˚C