Semiconductor & Computer Engineering
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Revision as of 15:32, 13 December 2017
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| VL86C020 | |||||||||
| General Info | |||||||||
| Designer | Acorn Computers | ||||||||
| Manufacturer | VLSI Technology, Sanyo | ||||||||
| Model Number | VL86C020 | ||||||||
| Part Number | VL86C020-20FC, VL86C020-20GC, VY86C020-20FC, VY86C020-20GC, VY86C020-25FC | ||||||||
| Market | Embedded, Desktop | ||||||||
| Introduction | 1989 (launched) | ||||||||
| General Specs | |||||||||
| Family | VL86Cx | ||||||||
| Frequency | 20 MHz, 25 MHz | ||||||||
| Microarchitecture | |||||||||
| ISA | ARMv2a (ARM) | ||||||||
| Microarchitecture | ARM3 | ||||||||
| Chipset | MEMC, VIDC, IOC | ||||||||
| Process | 1.5 µm | ||||||||
| Transistors | 309,656 | ||||||||
| Technology | CMOS | ||||||||
| Die | 86.764 mm² 8.72 mm × 9.95 mm | ||||||||
| Word Size | 32 bit | ||||||||
| Cores | 1 | ||||||||
| Threads | 1 | ||||||||
| Max Memory | 64 MiB | ||||||||
| Max Address Mem | 0x3FFFFFF | ||||||||
| Multiprocessing | |||||||||
| Max SMP | 1-Way (Uniprocessor) | ||||||||
| Electrical | |||||||||
| Power dissipation | 2 W | ||||||||
| Vcore | 5 ± 5 % | ||||||||
| Tstorage | -65 °C – -150 °C | ||||||||
| Tambient | -10 °C – 80 °C | ||||||||
| Packaging | |||||||||
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VL86C020 is a 32-bit ARM microprocessor designed by Acorn and introduce by VTI in 1989. This processor is based on the ARM3 microarchitecture and was Acorn's second commercial ARM processor. This chip was manufactured on VLSI's 1.5 µm process and operated at 20 MHz an 25 MHz.
This processor operates performs at over three times the performance of its predecessor thanks to its higher clock speed and on-die cache.
Contents
Cache
- Main article: ARM3 § Cache
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Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes. |
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Second source
This microprocessor was second-sourced by Sanyo.
Systems
- Acorn Archimedes A500, 1987
- Acorn Archimedes A540, 1990
- Acorn R225, 1990
- Acorn R260, 1990
- Acorn Archimedes A5000, 1991
- Acorn A4, 1992
- Acorn Archimedes A5000 (Alpha), 1993
Note: The A500 predates the actual chip introduction because it was never commercially sold.
Datasheet
- VL86C020 Datasheet, 1990