MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1125
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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14.8.20 DRAM Control Register 22 (HW_DRAM_CTL22)
This is a DRAM configuration register.
Freescale Semiconductor, Inc.
Reset
DLL_BYPASS_
DLLLOCKREG
CKE_DELAY
DLL_LOCK
Bit
W
R
RSVD3
RSVD2
RSVD1
MODE
31 27
26 24
23 16
Field
15 9
7 1
8
0
15
0
14
0
Always write zeroes to this field.
Additional cycles to delay CKE for status reporting.
Sets the number of additional cycles of delay to include in the CKE signal cke_status for status reporting.
The default delay is 0 cycles.
Number of delay elements in master DLL lock. READ-ONLY
Defines the actual number of delay elements used to capture one full clock cycle. This parameter is
automatically updated every time a refresh operation is performed. This parameter is read-only.
Always write zeroes to this field.
Status of DLL lock coming out of master delay. READ-ONLY
Shows status of the DLL as locked or unlocked. This parameter is read-only
'b0 = DLL is unlocked.
'b1 = DLL is locked.
Always write zeroes to this field.
Enable the DLL bypass feature of the controller.
This parameter has no meaning for this EMI.
13
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
RSVD2
12
0
HW_DRAM_CTL21 field descriptions
11
0
10
0
0
9
0
8
Description
0
7
0
6
Chapter 14 External Memory Interface (EMI)
5
0
RSVD1
4
0
0
3
0
2
0
1
1125
0
0
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