Published:2011/8/16 21:51:00 Author:Phyllis From:SeekIC
By Tony Dixon
All three controller chips are based on a common system architecture approach which offers the same memory map, vectored interrupt controller and similar peripheral complements. Also common to them are the same Flash programming and updating mechanism, JTAG debugging and emulation facilities.
These devices operate from 1.8 V for the core CPU functions and 3.3 V for the I/O and peripherals, with the general I/O being 5 V tolerant.
Philips has extended the LPC21xx family to include new devices packaged either in a 64-pin or a 144-pin LQFP. These new family members offer larger Flash memory options, an additional SPI interface and additional digital I/O lines. They also included either a 4 or 8 channel ADC with 10-bit resolution, 2- or 4-channel CAN bus interface and the option of an external memory interface on the larger 144-pin devices.
The LPC21 Ox devices have a number of development and evaluation boards from companies such as Hitek, Keil, IAR and Nohau.
According to press releases from Philips we can expect future members of the LPC21 xx and LPC22xx family to include Ethernet, USB, and 802.11 capabilities. Something to look forward to!
OKI Semiconductors
OKI Semiconductors (www.oki.com) are a Japanese company who offer a broad range of ICS and have been providing 32-bit ARM-based solutions for a number of years. Oki have extended its microcontroller portfolio by introducing a new series of general-purpose 32-bit microcontrollers based on an ARM7TDMI core.
These new two lines consist of the ML674001 and the ML675001 series. The ML674001 series comprises of three products: the ML674001, the ML67Q4002 and the ML67Q4003. While the ML675001 series consisting of the ML675001, the ML67Q5002 and the ML67Q5003. TheML674001 andML675001 are ROMless parts.
The ML67Q4002/3 and ML67Q5002/3 microcontrollers offer large Flash memory options up to 512 kB and 32 kB of RAM. Other peripherals include 1 x system timer, 6 x general purpose timers, 2 x PWM, watch dog timer, general purpose I/O ports, ADC converters and 2 x DMA channels. Communications are provided 2 x UARTs; one UART is an industry standard 16550A and has 16 bytes FIFO for both send and receive, with the other having no FIFO; an I^C and SPI interface. The chips also include an external memory interface that features a SDRAM controller allowing for ROMs (including Flash memories), SRAMs, DRAMs, or I/O devices can be directly connected to the on-board SDRAM controller. A standard JTAG interface is provided for debugging and device programming. These chips can also be programmed by using a special Boot mode program built into the device. In boot mode, the on-chip boot ROM downloads a Flash writing application into the internal RAM area of the MCU. This application then handles the serial transfer and writing of internal Flash through the UART interface of the MCU.
The chips require 2.5 V for the core CPU functions and 3.3 V for the I/O and peripherals. The series operate in a wide temperature range of -40:C to +85CC. The ML674001 series can operate at a maximum frequency of 33 MHz, while the ML675001 series operates at a maximum frequency of 60 MHz. The ML675001 series has an 8-kB unified cache memory allowing the chip to operate at the higher clock speed.
The ML67Q4002/3 and ML67Q5002/3 are packaged in a 144-pin LQFP and all the microcontrollers are of a pin-compatible design, allowing for easier upgrade from the ML674001 series to the ML675001 series with a minimum of program and board layout change.
Next month’s issue
has a heavy focus on microcontrollers and it is no coincidence that you will be able to read about an extremely powerful ARM microcontroller development system you can build at home, in class or in the lab. As far as we know, this is a first in electronics magazine publishing but then again who else but Elektor?
Reprinted Url Of This Article: http://www.seekic.com/blog/project_solutions/2011/08/16/LPC210x_'ARMEE'_DEVELOPMENT_BOARD__Part_1__an_ARM_processor_survey_(2).html
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