The LPC2194 is based on a 16/32 bit ARM7TDMI-S™ CPU with real-time emulation and embedded trace support, together with 256 kilobytes (kB) of embedded high speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at maximum clock rate. For critical code size applications, the alternative 16-bit Thumb® Mode reduces code by more than 30 % with minimal performance penalty. With its compact 64 pin package, low power consumption, various 32-bit timers, 4-channel 10-bit ADC, 4 advanced CAN channels, PWM channels and 46 GPIO lines with up to 9 external interrupt pins this microcontroller is particularly suitable for automotive applications such as a CAN gateway that connects several CAN busses or a CAN bridge between sub networks at different speeds. Sensors with CAN interface or debugging via CAN are additional application that need more than 2 CAN interfaces. It is also an adequate solution for industrial control, medical systems and fault-tolerant maintenance buses. With a wide range of additional serial communications interfaces, it is also suited for communication gateways and protocol converters as well as many other general-purpose applications.
Remark: Throughout the data sheet, the term LPC2194 will apply to devices with and without the /00 suffix. New devices will use the /00 suffix to differentiate from the original devices only when necessary.
Features
16/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package.
16 kB on-chip Static RAM and 256 kB on-chip Flash Program Memory. 128-bit wide interface/accelerator enables high speed 60 MHz operation.
In-System Programming (ISP) and In-Application Programming (IAP) via on-chip boot-loader software. Flash programming takes 1 ms per 512 byte line. Single sector or full chip erase takes 400 ms.
EmbeddedICE-RT and Embedded Trace interfaces offer real-time debugging with on-chip RealMonitor™ software as well as high speed real-time tracing of instruction execution.
Four interconnected CAN interfaces with advanced acceptance filters. Additional serial interfaces are two UARTs (16C550), Fast I²C (400 kbits/s) and two SPIs.
Four channel 10-bit A/D converter with conversion time as low as 2.44 us.
Two 32-bit timers (with 4 capture and 4 compare channels), PWM unit (6 outputs), Real Time Clock and Watchdog.
Vectored Interrupt Controller with configurable priorities and vector addresses.
Up to forty-six 5 V tolerant general purpose I/O pins. Up to nine edge or level sensitive external interrupt pins available.
Operating temperature range from -40 Cel. to +105 Cel.
60 MHz maximum CPU clock available from programmable on-chip Phase-Locked Loop with settling time of 100 us.
On-chip crystal oscillator with an operating range of 1 MHz to 30 MHz.
Two low power modes, Idle and Power-down.
Processor wake-up from Power-down mode via external interrupt.
Individual enable/disable of peripheral functions for power optimization.
Dual power supply:
CPU operating voltage range of 1.65 V to 1.95 V (1.8 V +-0.15 V).
I/O power supply range of 3.0 V to 3.6 V (3.3 V +-10 pct.) with 5 V tolerant I/O pads.
