mcimx27- Freescale Semiconductor, Inc, mcimx27- Datasheet - Page 5

• Manufacturer Part Number: mcimx27-
• Description: Multimedia Applications Processor
• Manufacturer: Freescale Semiconductor, Inc

The four alternate bus master ports on the ARM926 Platform, which are connected directly to master ports
of the MAX, are designed to support connections to multiple AHB masters external to the platform. An
external arbitration AHB control module is needed if multiple external masters are desired to share an
ARM926 Platform alternate bus master port. However, the alternate bus master ports on the platform
support seamless connection to a single master with no external interface logic required.
A primary AHB MUX (PAHBMUX) module performs address decoding, read data muxing, bus
watchdog, and other miscellaneous functions for the primary AHB within the platform. A clock control
module (CLKCTL) is provided to support a power-conscious design methodology, as well as
implementation of several clock synchronization circuits.
2.1.1
The ARM926EJ-S complex includes 16-Kbyte Instruction and 16-Kbyte Data caches. The embedded
45-Kbyte SRAM (VRAM) can be used to avoid external memory accesses or it can be used for
applications. There is also a 24-Kbyte ROM for bootstrap code.
2.2
Table 2
processors. A cross-reference to each module’s section and page number goes directly to a more detailed
module description for additional information.
Freescale Semiconductor
Block Mnemonic
ARM926EJS
AUDMUX
1-Wire
AITC
AIPI
ATA
shows an alphabetical listing of the modules in the i.MX27/MX27L multimedia applications
Module Inventory
®
Memory System
Technology(AT
ARM926EJ-S
Block Name
) Attachment
Digital Audio
AHB-Lite IP
ARM9EJ-S
Multiplexer
Controller
Advanced
Interface
Interface
Interrupt
Module
1-Wire
Connectivity
Connectivity
Bus Control
Bus Control
Functional
Multimedia
Grouping
Peripheral
Peripheral
Peripheral
Preliminary—Subject to Change Without Notice
i.MX27 and i.MX27L Data Sheet, Rev. 1.2
Table 2. Digital and Analog Modules
CPU
The 1-Wire module provides bi-directional communication
between the ARM926EJ-S and the Add-Only-Memory EPROM
(DS2502). The 1-Kbit EPROM is used to hold information
about battery and communicates with the ARM926 Platform
using the IP interface.
The AIPI acts as an interface between the ARM Advanced
High-performance Bus Lite. (AHB-Lite) and lower bandwidth
peripherals that conforms to the IP Bus specification, Rev 2.0.
AITC is connected to the primary AHB as a slave device. It
generates the normal and fast interrupts to the ARM926EJ-S
processor.
The ARM926EJ-S (ARM926) is a member of the ARM9 family
of general-purpose microprocessors targeted at multi-tasking
applications.
The ATA block is an AT attachment host interface. It interfaces
with IDE hard disc drives and ATAPI optical disc drives.
The AUDMUX interconnections allow multiple, simultaneous
audio/voice/data flows between the ports in point-to-point or
point-to-multipoint configurations.
Brief Description
Functional Description and Application Information
Section/
2.3.2/10
2.3.3/10
2.3.4/10
2.3.5/11
2.3.6/11
2.3.1/9
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