MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 2322
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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Examples
39.5.1 Setting 1-Bit Wide Field
// Preferred (one atomic write to SET register)
HW_GPMI_CTRL0_SET(BM_GPMI_CTRL0_UDMA);
// Alternate (same as above, just different syntax)
BF_SET(GPMI_CTRL0, UDMA);
// Avoid
BW_GPMI_CTRL0_UDMA(1);
BF_WR(GPMI_CTRL0, UDMA, 1);
HW_GPMI_CTRL0.B.UDMA = 1;
39.5.2 Clearing 1-Bit Wide Field
// Preferred (one atomic write to _CLR register)
HW_GPMI_CTRL0_CLR(BM_GPMI_CTRL0_DEV_IRQ_EN);
// Alternate (same as above, just different syntax)
BF_CLR(GPMI_CTRL0, DEV_IRQ_EN);
// Avoid
BW_GPMI_CTRL0_DEV_IRQ_EN(0);
BF_WR(GPMI_CTRL0, DEV_IRQ_EN, 0);
HW_GPMI_CTRL0.B.DEV_IRQ_EN = 0;
39.5.3 Toggling 1-Bit Wide Field
// Preferred (one atomic write to _TOG register)
HW_GPMI_CTRL0_TOG(BM_GPMI_CTRL0_RUN);
// Alternate (same as above, just different syntax)
BF_TOG(GPMI_CTRL0, RUN);
// Avoid
HW_GPMI_CTRL0.B.RUN ^= 1;
39.5.4 Modifying n-Bit Wide Field
// Preferred (does CS operation or byte/halfword write if the field is
//
BW_GPMI_CTRL0_COMMAND_MODE(BV_GPMI_CTRL0_COMMAND_MODE_READ_AND_COMPARE);
BW_GPMI_CTRL0_COMMAND_MODE(iMode);
BW_GPMI_CTRL0_XFER_COUNT(2);
// Alternate (same as above, just different syntax)
BF_WR(GPMI_CTRL0, COMMAND_MODE, BV_GPMI_CTRL0_COMMAND_MODE_READ_AND_COMPARE);
BF_WR(GPMI_CTRL0, COMMAND_MODE, iMode);
BF_WR(GPMI_CTRL0, XFER_COUNT, 2);
// Avoid (RMW)
HW_GPMI_CTRL0.B.COMMAND_MODE = BV_GPMI_CTRL0_COMMAND_MODE_READ_AND_COMPARE;
HW_GPMI_CTRL0.B.COMMAND_MODE = iMode;
39.5.5 Modifying Multiple Fields
// Preferred (explicit CS operation)
HW_GPMI_CTRL0_CLR( OR3(BM_GPMI_CTRL0, RUN, DEV_IRQ_EN, COMMAND_MODE) );
2322
8 or 16 bits wide and properly aligned)
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
// writes 1 to _CLR then 1 to _SET register
// same as above, just different syntax
// RMW
// writes 1 to _CLR then 0 to _SET register
// this does a halfword write
// this does a halfword write
// same as above, just different syntax
// RMW
// RMW
Freescale Semiconductor, Inc.
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