MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1100
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
- Current page: 1100 of 2327
- Download datasheet (17Mb)
DDR PHY
io_dq_in and io_dqs_in are not aligned with emi_clk in phase. Many factors affect the phase
of io_dq/dqs_in, such as voltage, temperature, board layout, manufacturing process, and so
on.
1100
1. Must capture the io_dq_in by delayed_dqs to meet the critical timing requirement in
2. The data path width @emi_clk domain is twice the data path width @delayed_dqs
3. The EMI core logic fetch read data by the rise-edge of emi_clk.
4. The EMI core logic fetch read data by two important signals: dfi_rddata and
5. The user can program the timing position of dfi_rddata and dfi_rddata_valid by
high frequency.
domain.
dfi_rddata_valid.
programmable registers phy_ctrl_reg_0[26:24] and phy_ctrl_reg_2[3:0]. The unit is
one cycle of emi_clk.
delayed_dqs
io_dq_in
data buffers
@delayed_dqs
clock domain
Synchronize data
to emi_clk doamin
phy_ctrl_reg_0 [26:24]
dfi_rddata: data returned to core-logic
@emi_clk domain
dfi_rddata_valid: phy_ctrl_reg_2 [3:0]
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Figure 14-11. Synchronized Read Data
d0
d1
d2
1
1
d0,d1
d3
d0
d4
d1
2
2
d5
d0,d1
d2
d2,d3
d3
3
3
d2,d3
d4
d4,d5
d5
4
4
Freescale Semiconductor, Inc.
d4,d5
emi_clk
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