MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1680

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• 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: Compliant

Programmable Registers
26.4.23 ENET MAC Maximum Receive Buffer Size Register
The EMRBR is a user-programmable register that dictates the maximum size of all receive
buffers. Note that because receive frames are truncated at 2k-15bytes, only bits 10-4 are
used. This value should take into consideration that the receive CRC is always written into
the last receive buffer. To allow on maximum size frame per buffer, EMRBR must be set
to RCR[MAX_FL] or larger. The EMRBR must be evenly divisible by 16. To ensure this,
bits 3-0 are forced low. To minimize bus utilization (descriptor fetches), it is recommended
that EMRBR be greater than or equal to 256 bytes.
Address:
Re-
1680
set
Bit
W
R
R_BUF_SIZE
31
RSRVD0
RSRVD1
0
31 11
Field
10 4
3 0
30
0
29
0
HW_ENET_MAC_EMRBR
(HW_ENET_MAC_EMRBR)
28
0
Reserved bits. Write as 0.
Receive buffer size in bytes.
0x00 0 bytes
0x01 16 bytes
0x02 32 bytes
...
0x7F 2032 bytes
Reserved bits. Write as 0.
27
0
26
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
25
0
24
0
HW_ENET_MAC_EMRBR field descriptions
23
0
22
RSRVD0
0
21
0
800F_0000h base + 188h offset = 800F_0188h
20
0
19
0
18
0
17
0
16
0
15
0
Description
14
0
13
0
12
0
11
0
10
0
0
9
R_BUF_SIZE
0
8
Freescale Semiconductor, Inc.
0
7
0
6
0
5
0
4
3
0
RSRVD1
0
2
0
1
0
0