C505L

8位CMOS微控制器 8-Bit CMOS Microcontroller

• Three 16-bit timers/counters

– Timer 0 / 1 C501 compatible

– Timer 2 with 4 channels for 16-bit capture/compare operation

• 128-segment LCD Controller

– 1/4 duty cycle drive

– 4 row and 32 column outputs

– On-chip programmable reference voltage generation

– 20 dedicated LCD output lines 4 rows + 16 columns

• Real-Time Clock

– 47-bit digital clock counter

– Input frequency of 32.768 KHz required

– Operates in a special power down mode

• Full duplex serial interface with programmable baudrate generator USART

• 10-bit A/D Converter with 8 multiplexed inputs

• Twelve interrupt sources with four priority levels

• On-chip emulation support logic Enhanced HooksTM 1

• Programmable 15-bit Watchdog Timer

• Oscillator Watchdog

• Fast power-on reset

• Power-saving modes

– Slow-down mode

– Idle mode can be combined with slow-down mode

– 3 special power down modes

– Software power-down mode with wake up capability through INT0 pin or Real-Time Clock

• P-MQFP-80 package

• Temperature ranges: SAB- TA = 0 to 70 °C

                              SAF-C505L TA = – 40 to 85 °C

                             SAK-C505L TA = – 40 to 125 °C max. operating frequency: 12 MHzFeatures

• 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