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Questions and Answers
What is the maximum clock frequency of the CPU?
How many UARTs are available on the LPC2146/48?
What is the maximum size of the on-chip flash memory?
What is the resolution of the ADCs available on the LPC2146/48?
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What is the purpose of the Vectored Interrupt Controller (VIC)?
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How many general purpose I/O pins are available on the LPC2146/48?
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What is the time it takes to program 256 bytes of flash memory?
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What is the purpose of the on-chip boot loader software?
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What is the primary function of the EmbeddedICE RT and Embedded Trace interfaces?
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What is the minimum time required for full chip erase?
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How many capture channels are available in each of the 32-bit timers/external event counters?
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What is the frequency range of the external crystal that can be used with the on-chip integrated oscillator?
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What is the purpose of the peripheral clock scaling feature?
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What is the maximum number of external interrupt pins available?
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What is the primary function of the power saving modes?
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What is the total amount of RAM accessible to the USB controller via DMA?
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Study Notes
Microcontroller Overview
- 16-bit/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package.
Memory and Interface
- 8 kB to 40 kB of on-chip static RAM and 32 kB to 512 kB of on-chip flash memory.
- 128-bit wide interface/accelerator enables high-speed 60 MHz operation.
Programming and Debugging
- In-System Programming/In-Application Programming (ISP/IAP) via on-chip boot loader software.
- Single flash sector or full chip erase in 400 ms and programming of 256 bytes in 1 ms.
- EmbeddedICE RT and Embedded Trace interfaces offer real-time debugging with the on-chip RealMonitor software and high-speed tracing of instruction execution.
USB and Analog Features
- USB 2.0 Full-speed compliant device controller with 2 kB of endpoint RAM.
- 8 kB of on-chip RAM accessible to USB by DMA.
- One or two 10-bit ADCs provide a total of 6/14 analog inputs, with conversion times as low as 2.44 ms per channel.
- Single 10-bit DAC provides variable analog output (LPC2142/44/46/48 only).
Timers, Counters, and Watchdog
- Two 32-bit timers/external event counters (with four capture and four compare channels each).
- PWM unit (six outputs) and watchdog.
Clock and Power Management
- Low power Real-Time Clock (RTC) with independent power and 32 kHz clock input.
- 60 MHz maximum CPU clock available from programmable on-chip PLL with settling time of 100 ms.
- On-chip integrated oscillator operates with an external crystal from 1 MHz to 25 MHz.
- Power saving modes include Idle and Power-down.
- Individual enable/disable of peripheral functions as well as peripheral clock scaling for additional power optimization.
Interrupt and I/O
- Vectored Interrupt Controller (VIC) with configurable priorities and vector addresses.
- Up to 45 of 5 V tolerant fast general purpose I/O pins in a tiny LQFP64 package.
- Up to 21 external interrupt pins available.
Power Supply
- Single power supply chip with POR and BOD circuits.
- CPU operating voltage range of 3.0 V to 3.6 V (3.3 V ± 10 %) with 5 V tolerant I/O pads.
Microcontroller Overview
- 16-bit/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package.
Memory and Interface
- 8 kB to 40 kB of on-chip static RAM and 32 kB to 512 kB of on-chip flash memory.
- 128-bit wide interface/accelerator enables high-speed 60 MHz operation.
Programming and Debugging
- In-System Programming/In-Application Programming (ISP/IAP) via on-chip boot loader software.
- Single flash sector or full chip erase in 400 ms and programming of 256 bytes in 1 ms.
- EmbeddedICE RT and Embedded Trace interfaces offer real-time debugging with the on-chip RealMonitor software and high-speed tracing of instruction execution.
USB and Analog Features
- USB 2.0 Full-speed compliant device controller with 2 kB of endpoint RAM.
- 8 kB of on-chip RAM accessible to USB by DMA.
- One or two 10-bit ADCs provide a total of 6/14 analog inputs, with conversion times as low as 2.44 ms per channel.
- Single 10-bit DAC provides variable analog output (LPC2142/44/46/48 only).
Timers, Counters, and Watchdog
- Two 32-bit timers/external event counters (with four capture and four compare channels each).
- PWM unit (six outputs) and watchdog.
Clock and Power Management
- Low power Real-Time Clock (RTC) with independent power and 32 kHz clock input.
- 60 MHz maximum CPU clock available from programmable on-chip PLL with settling time of 100 ms.
- On-chip integrated oscillator operates with an external crystal from 1 MHz to 25 MHz.
- Power saving modes include Idle and Power-down.
- Individual enable/disable of peripheral functions as well as peripheral clock scaling for additional power optimization.
Interrupt and I/O
- Vectored Interrupt Controller (VIC) with configurable priorities and vector addresses.
- Up to 45 of 5 V tolerant fast general purpose I/O pins in a tiny LQFP64 package.
- Up to 21 external interrupt pins available.
Power Supply
- Single power supply chip with POR and BOD circuits.
- CPU operating voltage range of 3.0 V to 3.6 V (3.3 V ± 10 %) with 5 V tolerant I/O pads.
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Description
Test your knowledge of microcontrollers, including their architecture, memory, and programming features. This quiz covers the basics of microcontrollers and their applications.
