I.MX27 Datasheet, PDF (6/148 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor

Functional Description and Application Information
Table 2. Digital and Analog Modules (continued)
Block Mnemonic Block Name
Functional
Grouping
Brief Description
Section/
Page
ATA
AUDMUX
CRM
CSI
CSPI
DMAC
eMMA_lt
EMI
ESDRAMC
FEC
GPIO
GPT
Advanced
Technology (AT)
Attachment
Connectivity The ATA block is an AT attachment host interface. It interfaces
Peripheral with IDE hard disc drives and ATAPI optical disc drives.
2.3.5/11
Digital Audio
Multiplexer
Multimedia
Peripheral
The AUDMUX interconnections allow multiple, simultaneous
audio/voice/data flows between the ports in point-to-point or
point-to-multipoint configurations.
2.3.6/11
Clock and
Reset Module
Clock and The CRM generates clock and reset signals used throughout
Reset Control the i.MX27/MX27L processors and also for external
peripherals.
2.3.7/12
CMOS Sensor
Interface
Multimedia
Interface
The CSI is a logic interface which enables the i.MX27/MX27L 2.3.8/12
processors to connect directly to external CMOS sensors and
a CCIR656 video source.
Configurable
Serial Peripheral
Interface (x3)
Connectivity
Peripheral
The i.MX27/MX27L processors have three CSPI modules.
CSPI is equipped with two data FIFOs and is a master/slave
configurable serial peripheral interface module, allowing the
i.MX27/MX27L processors to interface with both external SPI
master and slave devices.
2.3.9/13
Direct Memory
Access
Controller
Standard
System
Resource
The DMAC of the i.MX27/MX27L processors provides 16
channels supporting linear memory, 2D memory, FIFO and
end-of-burst enable FIFO transfers to support a wide variety of
DMA operations.
2.3.10/13
eMMA_lt
H/W
Accelerator
Functions
eMMA_lt consists of a PreProcessor and PostProcessor, and
provides video acceleration. The PrP and PP can be used for
generic video pre and post processing such as scaling,
resizing, and color space conversions.
2.3.11/13
External
Memory The EMI includes
—
Memory
Interface
Interface (EMI) _{• Multi-Master Memory Interface (M3IF)}
• Enhanced SDRAM/MDDR memory controller (ESDRAMC)
• PCMCIA memory controller (PCMCIA)
• NAND Flash Controller (NFC)
• Wireless External Interface Module (WEIM)
Enhanced
SDRAM
Controller
External
Memory
Interface
The ESDRAMC provides interface and control for synchronous 2.3.12/15
DRAM memories for the system.
Fast Ethernet
Controller
Connectivity
Peripheral
The FEC performs the full set of IEEE 802.3/Ethernet
CSMA/CD media access control and channel interface
functions. The FEC supports connection and functionality for
the 10/100 Mbps 802.3 media independent interface (MII). It
requires an external transceiver (PHY) to complete the
interface to the media.
2.3.13/15
General
Purpose I/O
Module
Pins
The GPIO provides 32 bits of bidirectional, general purpose 2.3.14/16
I/O. This peripheral provides dedicated general-purpose pins
that can be configured as either inputs or outputs.
General
Purpose Timer
Timer
The GPT is a multipurpose module used to measure intervals 2.3.15/16
Peripheral or generate periodic output.
i.MX27 and i.MX27L Data Sheet, Rev. 1.5
6
Freescale Semiconductor