MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1679
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: 1679 of 2327
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26.4.22 ENET MAC Pointer to Transmit Descriptor Ring Register
The user writes the ETDSR. It provides a pointer to the start of the circular transmit buffer
descriptor queue in external memory. This pointer must be 32-bit aligned; however, it is
recommended it be made 128-bit aligned (evenly divisible by 16). The user should write
bits 1 and 0 to 0. Hardware ignores non-zero values in these two bit positions.
Address:
Freescale Semiconductor, Inc.
Reset
Reset
R_DES_START
X_DES_START
Bit
Bit
W
W
RSRVD0
RSRVD0
R
R
Field
31 2
Field
31 2
1 0
1 0
31
15
0
0
HW_ENET_MAC_ETDSR 800F_0000h base + 184h offset = 800F_0184h
(HW_ENET_MAC_ETDSR)
30
14
0
0
Pointer to start of receive buffer descriptor queue.
Reserved bits. Write as 0.
Pointer to start of transmit buffer descriptor queue.
Reserved bits. Write as 0.
29
13
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
12
HW_ENET_MAC_ERDSR field descriptions
0
0
HW_ENET_MAC_ETDSR field descriptions
27
11
0
0
26
10
0
0
X_DES_START[15:2]
25
0
0
9
X_DES_START[31:16]
24
0
0
8
Description
Description
23
0
0
7
22
0
0
6
21
0
5
0
Chapter 26 Ethernet Controller (ENET)
20
0
4
0
19
0
0
3
18
0
0
2
17
RSRVD0
0
0
1
1679
16
0
0
0
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