MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1146
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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Programmable Registers
14.8.40 DRAM Control Register 42 (HW_DRAM_CTL42)
This is a DRAM configuration register.
Address:
Re-
14.8.41 DRAM Control Register 43 (HW_DRAM_CTL43)
This is a DRAM configuration register.
Address:
Re-
1146
set
set
Bit
Bit
W
W
R
R
OBSOLETE
TRAS_MAX
TRAS_MIN
31
31
0
0
RSVD2
31 24
31 28
27 24
23 16
TRFC
Field
23 8
Field
TRP
7 0
RSVD2
30
30
0
0
29
29
0
0
OBSOLETE
HW_DRAM_CTL42
HW_DRAM_CTL43
28
28
0
0
Always write zeroes to this field.
DRAM TRAS_MAX parameter in cycles.
Defines the DRAM maximum row active time, in cycles.
DRAM TRAS_MIN parameter in cycles.
Defines the DRAM minimum row activate time, in cycles.
Always write zeroes to this field.
DRAM TRP parameter in cycles.
Defines the DRAM pre-charge command time, in cycles.
DRAM TRFC parameter in cycles.
Defines the DRAM refresh command time, in cycles.
27
27
0
0
26
26
0
0
TRP
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
25
25
0
0
24
24
0
0
23
23
0
0
HW_DRAM_CTL42 field descriptions
HW_DRAM_CTL43 field descriptions
800E_0000h base + A8h offset = 800E_00A8h
800E_0000h base + ACh offset = 800E_00ACh
22
22
0
0
21
21
0
0
TRFC
20
20
0
0
19
19
0
0
18
18
0
0
17
17
0
0
TRAS_MAX
16
16
0
0
RSVD1
15
15
0
0
Description
Description
14
14
0
0
13
13
0
0
12
12
0
0
11
11
0
0
10
10
0
0
0
0
9
9
0
0
8
8
Freescale Semiconductor, Inc.
TREF
0
0
7
7
0
0
6
6
0
0
5
5
TRAS_MIN
0
0
4
4
3
0
3
0
0
0
2
2
0
0
1
1
0
0
0
0
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