MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1676

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

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

Programmable Registers
26.4.18 ENET MAC Transmit FIFO Watermark and Store and Forward
Address:
1676
Reset
Reset
STR_FWD
Bit
Bit
W
W
RSRVD0
RSRVD1
R
R
TFWR
Field
31 9
7 6
5 0
8
31
15
0
0
HW_ENET_MAC_TFW_SFCR
0144h
Control Register (HW_ENET_MAC_TFW_SFCR)
30
14
0
0
Reserved bits. Write as 0.
Store and Forward Enable. When set to 1, Store and Forward is enabled, when set to 0 (Reset value), the
transmission start threshold is programmed with the TFWR bits.
Reserved bits. Write as 0.
When STR_FWD is set to 0, number of bytes, in steps of 64 Bytes, written to transmit FIFO before
transmission of a frame begins:
000000 64 bytes written
000001 64 bytes written
000010 128 bytes written
000011 192 bytes written
000100 256 bytes written
000101 320 bytes written
000110 384 bytes written
......
111110 3968 bytes written
111111 4032 bytes written
Note: if a frame with less than the threshold is written it will still be sent, independently of this threshold
setting. The threshold is only relevant if the frame is larger than the threshold given.
29
13
0
0
RSRVD0[15:9]
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
HW_ENET_MAC_TFW_SFCR field descriptions
28
12
0
0
27
11
0
0
26
10
0
0
800F_0000h base + 144h offset = 800F_
25
0
0
9
RSRVD0[31:16]
STR_
FWD
24
0
0
8
Description
23
RSRVD1
0
0
7
22
0
0
6
21
0
5
0
20
0
4
0
Freescale Semiconductor, Inc.
19
0
0
3
TFWR
18
0
0
2
17
0
0
1
16
0
0
0