C501 Datasheet, PDF (3/48 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

8-Bit CMOS Microcontroller
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)
• 256 × 8 RAM
• Four 8-bit ports
8K × 8 OTP memory (C501-1E)
• 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
SAF-C501
T_A : 0 ˚C to 70 ˚C
T_A : – 40 ˚C to 85 ˚C
C501
Power
Saving
Modes
T0
T2
T1
RAM
256 x 8
Port 0
Ι/O
Port 1
Ι/O
CPU
USART
Port 2
Ι/O
8K x 8 ROM (C501-1R)
8K x 8 OTP (C501-1E)
Port 3
Ι/O
MCA03238
Figure 1
C501G Functional Units
Semiconductor Group
3
1997-04-01