I.MX27L_11 Datasheet, PDF (6/152 Pages) Freescale Semiconductor, Inc – Multimedia Applications Processor Multiple clock and power domains

Functional Description and Application Information
Table 2. Digital and Analog Modules (continued)
Block Mnemonic Block Name
Functional
Grouping
Brief Description
Section/
Page
AUDMUX
CRM
CSI
CSPI
DMAC
eMMA_lt
EMI
ESDRAMC
FEC
GPIO
GPT
I²C
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
Inter IC
Communication
Timer
Peripheral
Connectivity
Peripheral
The GPT is a multipurpose module used to measure intervals 2.3.15/16
or generate periodic output.
The I²C provides serial interface to control the sensor interface 2.3.16/17
and other external devices. Data rates of up to 100 Kbits/s are
supported.
i.MX27 and i.MX27L Data Sheet, Rev. 1.7
6
Freescale Semiconductor