LPC2106 Philips Semiconductors, LPC2106 Datasheet - Page 8

• Manufacturer Part Number: LPC2106
• Description: Single-chip 32-bit microcontrollers; 128 kB ISP/IAP Flash with 64 kB/32 kB/16 kB RAM
• Manufacturer: Philips Semiconductors

Philips Semiconductors
6. Functional description
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Product data
6.1 Architectural overview
6.2 On-Chip Flash program memory
6.3 On-Chip static RAM
The ARM7TDMI-S is a general purpose 32-bit microprocessor, which offers high
performance and very low power consumption. The ARM architecture is based on
Reduced Instruction Set Computer (RISC) principles, and the instruction set and
related decode mechanism are much simpler than those of microprogrammed
Complex Instruction Set Computers. This simplicity results in a high instruction
throughput and impressive real-time interrupt response from a small and
cost-effective processor core.
Pipeline techniques are employed so that all parts of the processing and memory
systems can operate continuously. Typically, while one instruction is being executed,
its successor is being decoded, and a third instruction is being fetched from memory.
The ARM7TDMI-S processor also employs a unique architectural strategy known as
THUMB, which makes it ideally suited to high-volume applications with memory
restrictions, or applications where code density is an issue.
The key idea behind THUMB is that of a super-reduced instruction set. Essentially,
the ARM7TDMI-S processor has two instruction sets:
The THUMB set’s 16-bit instruction length allows it to approach twice the density of
standard ARM code while retaining most of the ARM’s performance advantage over a
traditional 16-bit processor using 16-bit registers. This is possible because THUMB
code operates on the same 32-bit register set as ARM code.
THUMB code is able to provide up to 65% of the code size of ARM, and 160% of the
performance of an equivalent ARM processor connected to a 16-bit memory system.
The LPC2104, LPC2105 and LPC2106 incorporate a 128 kB Flash memory system.
This memory may be used for both code and data storage. Programming of the Flash
memory may be accomplished in several ways. It may be programmed In System via
the serial port. The application program may also erase and/or program the Flash
while the application is running, allowing a great degree of flexibility for data storage
field firmware upgrades, etc. When on-chip bootloader is used, 120 kB of Flash
memory is available for user code.
On-Chip static RAM may be used for code and/or data storage. The SRAM may be
accessed as 8-bits, 16-bits, and 32-bits. The LPC2104 provides a 16 kB static RAM,
the LPC2105 provides a 32 kB static RAM, and the LPC2106 provides a 64 kB static
RAM.
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The standard 32-bit ARM set.
A 16-bit THUMB set.
Rev. 04 — 05 February 2004
LPC2104/2105/2106
Single-chip 32-bit microcontrollers
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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