2.1 Key features brought by LPC2194/01 devices
Fast GPIO ports enable port pin toggling up to 3.5 times faster than the
original device. They also allow for a port pin to be read at any time
regardless of its function.
Dedicated result registers for ADC(s) reduce interrupt overhead. The ADC
pads are 5 V tolerant when configured for digital I/O function(s).
UART0/1 include fractional baud rate generator, auto-bauding capabilities
and handshake flow-control fully implemented in hardware.
Buffered SSP serial controller supporting SPI, 4-wire SSI, and Microwire
SPI programmable data length and
Diversified Code Read Protection (CRP) enables different security levels
to be implemented. This feature is available in LPC2194/00 devices as
- General purpose timers can operate as external event counters.
2.2 Key features common for all devices
16/32-bit Arm7TDMI-S™ microcontroller in a tiny LQFP64
16 kB on-chip SRAM 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 bootloader software. Flash programming takes 1 ms per 512 B 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-bus
(400 kbit/s) and two SPIs.
Four channel 10-bit ADC with conversion time as low as 2.44 µs.
Two 32-bit timers (with four capture and four compare channels), PWM unit
(six outputs), Real-Time Clock and Watchdog.
Vectored Interrupt Controller with configurable priorities and vector
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 °C to +125 °C.
60 MHz maximum CPU clock available from programmable on-chip Phase-Locked
Loop with settling time of 100 µs.
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 %) with 5 V
tolerant I/O pads.