8-Bit CMOS Microcontroller
C505L
Advance Information
Features
• Fully compatible with the standard 8051 microcontroller
• Superset of the 8051 architecture with 8 datapointers
• Up to 20 MHz operating frequency
– 375 ns instruction cycle time @ 16 MHz
– 300 ns instruction cycle time @ 20 MHz (50% duty cycle)
• Program Memory
– 32K bytes of on-chip OTP memory
– Externally expandable up to 64 Kbytes
• 256-byte on-chip RAM
• 256-byte on-chip XRAM
• Five 8-bit and one 6-bit digital I/O ports (Port 5 with 6 bits only)
– Port 1 with mixed analog/digital I/O capability
– Port 3 with 2 LCD output lines as secondary functions
– Port 4 and 5 with 8 and 6 LCD output lines respectively as secondary functions
(more features are on next page)
Oscillator
Watchdog
10-Bit ADC
Timer 2
4-Channel PWM
Watchdog Timer
Real-Time Clock
XRAM
256 x 8
RAM
256 x 8
T0
CPU
8-Bit
T 1 8 Datapointers USART
OTP 32k x 8
O(CT5P053L2-4kE xon8ly)
Port 0
Port 1
Port 2
Port 3
Port 4
128-Segment LCD Control
Port 5
20 LCD Outputs
Figure 1
C505L Functional Units
8 Digit. I / O
8 Analog Inputs /
8 Digit. I / O
8 Digit. I / O
2 LCD Outputs /
8 Digit. I / O
8 LCD Outputs /
8 Digit. I / O
6 LCD Outputs /
6 Digit. I / O
MCB03832
Data Sheet
1
06.99