GDC21D601 Datasheet, PDF (23/189 Pages) Hynix Semiconductor – 32-Bit RISC MCU

GDC21D601
Section 3. ARM720T Core
1. General Description
ARM720T is 32bit microprocessor of general purpose with 8KB cache, enlarged write buffer and Memory
Management Unit (MMU), which are combined in a single chip. The CPU within ARM720T is the ARM7TDMI.
The ARM720T is software compatible with the ARM processor family. The ARM7TDMI is a member of the ARM
family of general purpose 32bit microprocessors, which offers high performance for very low power consumption
and price. This processor 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 a super reduced instruction set. Essentially, the ARM7TDMI has two instruction
sets, the standard 32bit ARM set and 16bit THUMB set. The THUMB set’s 16bit 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 16bit processor by using 16bit registers. This is possible because THUMB code operates on the same
32bit register set as ARM code.
See also ARM720T Datasheet (ARM DDI 0087D) for detail.
2. Feature
• 32bit RISC architecture
• Low power consumption
• ARM7TDMI core with;
- On-chip ICEbreaker debug support
- 32bit x 8 hardware multiplier
- Thumb decompressor
• Utilizes the ARM7TDMI embedded processor
- High performance 32 bit RISC architecture
- High density 16 bit instruction set
• Fully static operation : 0 ~ 80MHz
• 3-stage pipeline architecture (Fetch, decode, and execution stage)
• Enhanced ARM software toolkit
• MMU, Write Buffer, 8KB I/D Cache
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