参数资料
型号: MCIMX27LVOP4A
厂商: Freescale Semiconductor
文件页数: 98/152页
文件大小: 0K
描述: IC LOW END I.MX27 404-MAPBGA
视频文件: i.MX27 Multimedia Application Processor
标准包装: 90
系列: i.MX27
核心处理器: ARM9
芯体尺寸: 32-位
速度: 400MHz
连通性: 1 线,CAN,EBI/EMI,以太网,I²C,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外围设备: DMA,LCD,POR,PWM,WDT
程序存储器类型: ROMless
RAM 容量: 45K x 8
电压 - 电源 (Vcc/Vdd): 1.38 V ~ 1.52 V
振荡器型: 外部
工作温度: -20°C ~ 85°C
封装/外壳: 404-LFBGA
包装: 托盘
i.MX27 and i.MX27L Data Sheet, Rev. 1.8
Freescale Semiconductor
5
Functional Description and Application Information
The ARM926EJ-S processor provides support for external coprocessors enabling floating-point or other
application-specific hardware acceleration to be added. The ARM926EJ-S processor implements ARM
architecture version 5TEJ.
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
Memory System
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
Module Inventory
Table 2 shows an alphabetical listing of the modules in the i.MX27/MX27L multimedia applications
processors. A cross-reference to each module’s section and page number goes directly to a more detailed
module description for additional information.
Table 2. Digital and Analog Modules
Block Mnemonic
Block Name
Functional
Grouping
Brief Description
Section/
Page
1-Wire
1-Wire Interface
Connectivity
Peripheral
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.
AIPI
AHB-Lite IP
Interface
Module
Bus Control
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
ARM9EJ-S
Interrupt
Controller
Bus Control
AITC is connected to the primary AHB as a slave device. It
generates the normal and fast interrupts to the ARM926EJ-S
processor.
ARM926EJS
ARM926EJ-S
CPU
The ARM926EJ-S (ARM926) is a member of the ARM9 family
of general-purpose microprocessors targeted at multi-tasking
applications.
ATA
Advanced
Technology (AT)
Attachment
Connectivity
Peripheral
The ATA block is an AT attachment host interface. It interfaces
with IDE hard disc drives and ATAPI optical disc drives.
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