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ARM6 µarch
General Info
Arch Type	CPU
Designer	ARM Holdings
Manufacturer	VLSI Technology, GEC-Plessey Semiconductors
Introduction	1993
Process	0.8 µm
Core Configs	1
Pipeline
Type	Scalar, Pipelined
Stages	3
Decode	1-way
Instructions
ISA	ARMv3
Cache
L1 Cache	4 KiB/core 64-way set associative
Succession
ARM3 ARM7

ARM6 is an ARM microarchitecture designed by ARM Holdings and introduced in 1993 as a successor to the ARM3. This was the first design by ARM as an independent company after being spun-off from Acorn Computers.

History

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Process Technology

See also: 0.8 µm process

The ARM6 was implemented on a 0.8 µm CMOS process.

Architecture

Key changes from ARM3

• 32-bit address space (from 26-bit)
  • Can map 4 GiB of memory
  • CPSR & SPSR moved out of the program counter
  • Their own separate registers
• New Modes
  • Abort (abt)
  • Undefined (und)
• Virtual memory
  • Integrated MMU

New instructions

New ARM6 instructions:

Movement:

• MRS - Move from register to CPSR/SPSR
• MSR - Move from CPSR/SPSR to register

Die

ARM6 MacroCell

• 3.1 mm x 1.9 mm
• 5.89 mm² die size
• 54 mW @ 20 MHz @ 3 Volt
• 0.8 µm CMOS
• 35,530 transistors

ARM610

• 26.45 mm² die size
• 358,931 transistors
• TQFP-144

All ARM6 Chips

	List of ARM6-based Processors
Model	Manufacturer	Core	Launched	Frequency	Power Dissipation	Max Memory
VY86C060	VLSI Technology	ARM60	1993	20 MHz 0.02 GHz 20,000 kHz , 25 MHz 0.025 GHz 25,000 kHz		4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
VY86C06020	VLSI Technology	ARM60	1994	20 MHz 0.02 GHz 20,000 kHz		4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
VY86C06040	VLSI Technology	ARM60	1994	40 MHz 0.04 GHz 40,000 kHz		4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
VY86C060A	VLSI Technology	ARM60	1994	33 MHz 0.033 GHz 33,000 kHz		4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
VY86C061	VLSI Technology	ARM60	1993	20 MHz 0.02 GHz 20,000 kHz , 25 MHz 0.025 GHz 25,000 kHz		4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
VY86C610	VLSI Technology	ARM610	1993	20 MHz 0.02 GHz 20,000 kHz , 25 MHz 0.025 GHz 25,000 kHz		4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
VY86C610C	VLSI Technology	ARM610	23 July 1994	33 MHz 0.033 GHz 33,000 kHz	0.5 W 500 mW 6.705e-4 hp 5.0e-4 kW	4 GiB 4,096 MiB 4,194,304 KiB 4,294,967,296 B 0.00391 TiB
Count: 7

References

• Muller, Mike. "ARM6: a high performance low power consumption macrocell." Compcon Spring'93, Digest of Papers.. IEEE, 1993.