Open Access
Introduction
1-4
ARM Development Board (ARM7TDMI Version)
Hardware Reference Guide
ARM DUI 0017C
1.4 Glossary
Some of the terms used in this manual may be unfamiliar to you. This section explains some
of the more important ones.
ARM7TDMI The ARM7TDMI test chip is an example of an ARM processor
macrocell that is suitable for use on the ARM Development Card.
See the
ARM7TDMI Data Sheet
(ARM DDI 0029) for more
information.
CPLD A
complex programmable logic device
(
CPLD
) is usually
a collection of PAL-type devices in a single package.
The AMD MACH device is an example of a CPLD.
EmbeddedICE This is the additional hardware that is provided by debuggable
ARM processors to aid debugging. The EmbeddedICE
macrocell is fully described in the
ARM7TDMI Data Sheet
(ARM
DDI 0029). The EmbeddedICE macrocell is controlled via the
JTAG test access port, using an EmbeddedICE interface. This is
an extra piece of hardware that allows software tools to debug
code running on a target processor.
FPGA A
field-programmable gate array
(
FPGA
) is a type of
programmable logic device
(
PLD
). The ARM Development Card
is fitted with one FPGA manufactured by Xilinx. You can change
the functionality of this device if the appropriate design tools are
available. Xilinx sells an appropriate tool set which interfaces to
a variety of front-end systems which may be based on
schematics or hardware description languages such as VHDL.
See also
LCA
.
ICE An
in-circuit emulator
(
ICE
), is a device that aids debugging of
hardware and software. ARM debuggable processors such as
the ARM7TDMI have extra hardware called
EmbeddedICE
to
assist this process.
JTAG This is a serial-like test port provided on many large silicon chips
such as the ARM7TDMI.
LCA A
logic cell array
(
LCA
) is a type of
programmable logic device
(
PLD
) also known as a
field-programmable gate array
(
FPGA
).
MACH A MACH device is a example of a
complex programmable logic
device
(
CPLD
). The ARM Development Card uses a number of
MACH210 and MACH230 devices. Based on electrically
erasable (
EE
) technology, they are reprogrammable. Using
appropriate software (such as PALASM), the function of these
devices may be changed by reprogramming in a standard
programmer.
NISA
NISA
(
not-ISA
) is ARM’s description of the bus that connects the
Advanced System Bus
(
ASB
) to some standard peripheral
devices such as the serial/parallel ports and PC card controller.
It is a subset of the
Industry Standard Architecture
(
ISA
) bus
found in most IBM compatible PCs.
hrg.book Page 4 Wednesday, July 22, 1998 9:18 AM
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