Power conscious PC processors, mobile processors,
cryptography processors, RFID tags, etc. have obviously
supported the trend of ubiquitous network and
computing. The authors have developed a ubiquitous
processor named HCgorilla under the strategy
to unify these devices. The unification of those devices
has been effective to achieve power consciousness
for Green IT and secureness for ubiquitous environment.
The target of this study is the shift of HCgorilla
to SoC, considering the exploitation of adaptability
to SoC and resource-constrained implementation
is cutting edge microprocessor tendency. Since
this requires the total improvement of HCgorilla, the
complicated clock schemes are optimally unified together.
One of most important clock schemes applied
to HCgorilla is a waved MFU (multifunctional unit).
Although gated clock and scan path have been supported
by standard CAD tools, the wave-pipelining
has been mainly done by manual tuning because it
has not always been so popular. Thus, these clock
schemes are totally introduced. Specific features of
the improved HCgorilla and its implementation in a
CMOS standard cell chip are described in this article.
The HCgorilla.7 chip developed in this study is
the best in view of clock speed, occupied area, power
consumption, and hardware security.
Power conscious PC processors, mobile processors,
cryptography processors, RFID tags, etc. have obviously
supported the trend of ubiquitous network and
computing. The authors have developed a ubiquitous
processor named HCgorilla under the strategy
to unify these devices. The unification of those devices
has been effective to achieve power consciousness
for Green IT and secureness for ubiquitous environment.
The target of this study is the shift of HCgorilla
to SoC, considering the exploitation of adaptability
to SoC and resource-constrained implementation
is cutting edge microprocessor tendency. Since
this requires the total improvement of HCgorilla, the
complicated clock schemes are optimally unified together.
One of most important clock schemes applied
to HCgorilla is a waved MFU (multifunctional unit).
Although gated clock and scan path have been supported
by standard CAD tools, the wave-pipelining
has been mainly done by manual tuning because it
has not always been so popular. Thus, these clock
schemes are totally introduced. Specific features of
the improved HCgorilla and its implementation in a
CMOS standard cell chip are described in this article.
The HCgorilla.7 chip developed in this study is
the best in view of clock speed, occupied area, power
consumption, and hardware security.
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