MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1084

• 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

EMI Multi-Port Arbiter
For this system, the bandwidth will be monitored over each 100 cycles. The bandwidth
calculation parameters will be updated every 10 cycles with the bandwidth usage of the last
100 cycles as shown graphically in the figure.
The bandwidth totals are shown in #system_bandwidth_usage_example. In the system,
these values would be stored in the axiY_current_bdw parameters after each calculation.
1084
0
1
2
3
4
5
6
COUNTER
NUMBER
0 - 99
10 - 109
20 - 119
30 - 129
40 - 139
50 - 149
60 - 159
CYCLES COUNTING
Bandwidth
Window
100-109
110-119
120-129
130-139
140-149
150-159
160-169
170-179
180-189
190-199
Cycle
10-19
20-29
30-39
40-49
50-59
60-69
70-79
80-89
90-99
0-9
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Table 14-7. System Bandwidth Usage Example
Figure 14-6. System Bandwidth Example
Port 0 Port 1 Port 2 Port 3
61 / 100 = 61%
54 / 100 = 54%
49 / 100 = 49%
42 / 100 = 42%
43 / 100 = 43%
37 / 100 = 37%
36 / 100 = 36%
Number of Active Cycles
10
5
7
2
9
7
1
9
9
2
3
0
0
3
3
6
8
1
3
3
PORT 0
out of 10 Cycles
10
10
3
3
1
3
3
7
4
1
4
0
0
3
3
0
1
2
3
1
45 / 100 = 45%
39 / 100 = 39%
36 / 100 = 36%
33 / 100 = 33%
26 / 100 = 26%
28 / 100 = 28%
25 / 100 = 25%
10
10
PORT 1
CALCULATED USAGE
0
3
3
3
3
5
5
5
8
2
3
1
0
7
8
3
5
0
10
10
0
5
5
3
4
3
7
3
2
9
3
1
0
1
1
5
3
0
37 / 100 = 37%
40 / 100 = 40%
47 / 100 = 47%
54 / 100 = 54%
52 / 100 = 52%
49 / 100 = 49%
51 / 100 = 51%
PORT 2
41 / 100 = 41%
44 / 100 = 44%
49 / 100 = 49%
54 / 100 = 54%
52 / 100 = 52%
48 / 100 = 48%
46 / 100 = 46%
PORT 3
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