C541U_99 Datasheet, PDF (9/192 Pages) Siemens Semiconductor Group – 8-BIT CMOS MICROCONTROLLER

Introduction
C541U
Listed below is a summary of the main features of the C541U :
• Enhanced 8-bit C500 CPU
– Full software/toolset compatible to standard 80C51/80C52 microcontrollers
• 12 MHz external operating frequency
– 500 ns instruction cycle
• Built-in PLL for USB synchronization
• On-chip OTP program memory
– 8K byte
– Alternatively up to 64K byte external program memory
– Optional memory protection
• Up to 64K byte external data memory
• 256 byte on-chip RAM
• Four parallel I/O ports
– P-LCC-44 package : three 8-bit ports and one 6-bit port
– P-SDIP-52* package : four 8-bit ports
– LED current drive capability for 3 pins (10 mA)
• Two 16-bit timer/counters (C501 compatible)
• On-chip USB module
– Compliant to USB specification Rev1.0
– Full speed or low speed operation
– Five endpoints : one bidirectional control endpoint
four versatile programmable endpoints
– Registers are located in special function register area
– On-chip USB transceiver
• SSC synchronous serial interface (SPI compatible)
– Master and slave capable
– Programmable clock polarity / clock-edge to data phase relation
– LSB/MSB first selectable
– 1.5 MBaud transfer rate at 12 MHz operating frequency
• 7 interrupt sources (2 external, 5 internal with 2 USB interrupts) selectable at 2 priority levels
• Enhanced fail safe mechanisms
– Programmable watchdog timer
– Oscillator watchdog
• Power saving modes
– idle mode
– software power down mode with wake-up capability through INT0 pin or USB
• On-chip emulation support logic (Enhanced Hooks Technology ^TM)
• P-LCC-44 and P-SDIP-52* packages
• Power supply voltage range : 4.25V to 5.5V
• Temperature Range :
SAB-C541U
T_A = 0 to 70 °C
* P-SDIP-52 package is available on specific request from customer
Semiconductor Group
1-2
1997-10-01