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Chapter 20
Glossary
802.3
See IEEE 802.3.
AC
Audio Codec
AC97
AC97 Codec interface following Intel's AC97 specification.
AHB
Advanced High-Performance Bus. Defined in the AMBA specification, the AHB connects
the high-performance blocks. In the LH79524/LH79525, the AHB connects the ARM720
core, and a number of peripherals. The AHB connects to the APB via the APB Bridge. The
AHB supports burst mode data transfers and split transactions, and all timing is referenced
to a single clock edge.
ALI
Advanced LCD Interface. Allows direct connection to the Row and Column Driver chips in
newer superthin panels that do not incorporate a separate timing ASIC.
AMBA
Advanced Microprocessor Bus Architecture. This architecture is an open standard for an
on-chip bus connecting the blocks of an SoC.
APB
Advanced Peripheral Bus. Defined in the AMBA specification, the APB connects the lower-
performance peripheral blocks. In the LH79524/LH79525, the APB connects a number of
peripherals that do not require the speed or bandwidth of the AHB. The APB connects to
the AHB via the APB Bridge.
APB Bridge
Connection between the AHB and APB.
ARM720T Core
A microprocessor based on the ARM720T 32-bit RISC CPU, connecting to AMBA compli-
ant interfaces. For more information, see the ARM Ltd. website: http://www.arm.com.
AUI (Attachment Unit Interface)
Attachment Unit Interface. A 15-pin shielded, twisted pair Ethernet cable used (optionally)
to connect between network devices and an MAU. See also 'MAU'.
Version 1.0
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