MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1061
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MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
Specifications of MCIMX281AVM4B
Core Processor
ARM9
Core Size
32-Bit
Speed
454MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
Peripherals
DMA, I²S, LCD, POR, PWM, WDT
Program Memory Size
128KB (32K x 32)
Program Memory Type
Mask ROM
Ram Size
32K x 32
Voltage - Supply (vcc/vdd)
1.25 V ~ 5.25 V
Data Converters
A/D 17x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
289-LFBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of I /o
-
Eeprom Size
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
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Chapter 14
External Memory Interface (EMI)
14.1 Overview
The i.MX28 supports off-chip DRAM storage through the EMI controller, which is connected
to the four internal AHB/AXI busses. The EMI supports multiple external memory types,
including the following:
The EMI uses two primary clocks: the AHB bus, HCLK, and the DRAM source clock,
EMI_CLK. The maximum specified frequencies for these two clocks are 200 MHz. The
HCLK and EMI_CLK can be either synchronous or asynchronous, configurable.
The EMI consists of the following 3 major components:
14.1.1 Block Diagram
A high-level block diagram of the EMI is shown in the following figure.
Freescale Semiconductor, Inc.
• 1.8-V mobile DDR1 (LP-DDR1)
• Standard 1.8 V DDR2
• Low-voltage 1.5 V DDR2 (LV-DDR2)
• AXI/AHB bus interface and multi-port arbiter
• DRAM Control Logic
• DRAM PHY
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
1061
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