MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1990

• 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
Address:
Re-
31.7.21 Frame List Base Address Register (Host Controller mode)
In Host Controller mode, this 32-bit register contains the beginning address of the Periodic
Frame List in the system memory. HCD loads this register prior to starting the schedule
execution by the Host Controller. The memory structure referenced by this physical memory
pointer is assumed to be 4-Kbyte aligned. The contents of this register are combined with
the Frame Index Register (FRINDEX) to enable the Host Controller to step through the
Periodic Frame List in sequence. This is a read/write register. Writes must be DWORD
writes.
1990
set
Bit
W
R
FRINDEX
31
0
UINDEX
31 14
RSVD
Field
13 3
2 0
30
0
29
0
HW_USBCTRL_FRINDEX
(HW_USBCTRL_PERIODICLISTBASE)
28
0
Reserved.
Frame List Current Index.
Read/write in host mode.
Read in device mode.
The value in this register increments at the end of each time frame (e.g., micro-frame). Bits [N: 3] are used
for the Frame List current index. This means that each location of the frame list is accessed 8 times (frames
or micro-frames) before moving to the next index.
The following illustrates values of N based on the value of the Frame List Size field in the USBCMD register,
when used in host mode.
In device mode, the value is the current frame number of the last frame transmitted. It is not used as an
index.
12
11
10
9
8
7
6
5
Current Microframe.
27
0
26
0
N_12 — FRAME LIST SIZE = 1024, USBCMD = 3'b000.
N_11 — FRAME LIST SIZE = 512, USBCMD = 3'b001.
N_10 — FRAME LIST SIZE = 256, USBCMD = 3'b010.
N_9 — FRAME LIST SIZE = 128, USBCMD = 3'b011.
N_8 — FRAME LIST SIZE = 64, USBCMD = 3'b100.
N_7 — FRAME LIST SIZE = 32, USBCMD = 3'b101.
N_6 — FRAME LIST SIZE = 16, USBCMD = 3'b110.
N_5 — FRAME LIST SIZE = 8, USBCMD = 3'b111.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
25
0
24
0
HW_USBCTRL_FRINDEX field descriptions
RSVD
23
0
22
0
21
0
8008_0000h base + 14Ch offset = 8008_014Ch
20
0
19
0
18
0
17
0
16
0
15
0
Description
14
0
13
0
12
0
11
0
10
0
FRINDEX
0
9
0
8
Freescale Semiconductor, Inc.
0
7
0
6
0
5
0
4
3
0
0
2
UINDEX
0
1
0
0