C541U Datasheet, PDF (3/63 Pages) Siemens Semiconductor Group – 8 BIT CMOS MICROCONTROLLER

C541U
8-Bit CMOS Microcontroller
C541U
Advance Information
• 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
• 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
Oscillator _Watchdog
Watchdog _Timer
RAM
256 × 8
Port 0
I/O
SSC
T0
Port 1
I/O
CPU
Power
Saving
USB
T1
Modes
Module
Port 2
I/O
OTP Prog. Memory
8k×8
Port 3
I/O
USB Transceiver
D+ D-
Figure 1
C541U Functional Units
Semiconductor Group
1