MCF5481CVR166 Freescale Semiconductor, MCF5481CVR166 Datasheet - Page 8
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MCF5481CVR166
Manufacturer Part Number
MCF5481CVR166
Description
IC MPU 32BIT COLDF 388-PBGA
Manufacturer
Freescale Semiconductor
Series
MCF548xr
Datasheet
1.MCF5480CVR166.pdf
(34 pages)
Specifications of MCF5481CVR166
Core Processor
Coldfire V4E
Core Size
32-Bit
Speed
166MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, SPI, UART/USART, USB
Peripherals
DMA, PWM, WDT
Number Of I /o
99
Program Memory Type
ROMless
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.43 V ~ 1.58 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
388-BGA
Processor Series
MCF548x
Core
ColdFire V4
Data Bus Width
32 bit
Data Ram Size
32 KB
Maximum Clock Frequency
83 MHz
Operating Supply Voltage
3 V to 3.6 V
Maximum Operating Temperature
+ 85 C
3rd Party Development Tools
JLINK-CF-BDM26, EWCF
Development Tools By Supplier
M5485EVBE, M5485EVBGHSE, M5484LITEKITE
Minimum Operating Temperature
- 40 C
Program Memory Size
64KB
Cpu Speed
166MHz
Embedded Interface Type
I2C, UART, DMA
Digital Ic Case Style
BGA
No. Of Pins
388
Rohs Compliant
Yes
For Use With
M5485EVBGHSE - KIT DEV GHS FOR M5485EVBM5485EVBGHS - KIT DEV GHS FOR M5485EVBM5485BFEE - MODULE MCF5485 FIRE ENGINEM5485AFEE - MODULE MCF5485 FIRE ENGINEM5485AFE - MODULE MCF5485 FIRE ENGINEM5484GFEE - MODULE M5484 FIRE ENGINEM5484LITEKITE - KIT DEV FOR MCF548X FAMILY
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCF5481CVR166
Manufacturer:
Freescale Semiconductor
Quantity:
135
Hardware Design Considerations
4.3
4.3.1
4.3.2
Connecting the USBVBUS pin directly to the 5V VBUS signal from the USB connector can cause long-term reliability
problems in the ESD network of the processor. Therefore, use of an external voltage divider for VBUS is recommended.
Figure 4
should connect. Point B, marked in each figure, is where a 3.3V version of VBUS should connect to the USBVBUS pin on the
device.
4.3.3
It is recommended to connect the shield and the ground pin of the B USB receptacle for upstream ports to the board ground
plane. The ground pin of the A USB receptacles for downstream ports should also be connected to the board ground plane, but
industry practice varies widely on the connection of the shield of the A USB receptacles to other system grounds. Take
precautions for control of ground loops between hosts and self-powered USB devices through the cable shield.
8
1.
2.
3.
4.
5.
6.
7.
8.
9.
High speed clock and the USBD+ and USBD- differential pair should be routed first.
Route USBD+ and USBD- signals on the top layer of the board.
The trace width and spacing of the USBD+ and USBD- signals should be such that the differential impedance is 90Ω.
Route traces over continuous planes (power and ground)—they should not pass over any power/ground plane slots or
anti-etch. When placing connectors, make sure the ground plane clear-outs around each pin have ground continuity
between all pins.
Maintain the parallelism (skew matched) between USBD+ and USBD-. These traces should be the same overall length.
Do not route USBD+ and USBD- traces under oscillators or parallel to clock traces and/or data buses. Minimize the
lengths of high speed signals that run parallel to the USBD+ and USBD- pair. Maintain a minimum 50mil spacing to
clock signals.
Keep USBD+ and USBD- traces as short as possible.
Route USBD+, USBD-, and USBVBUS signals with a minimum amount of vias and corners. Use 45° turns.
Stubs should be avoided as much as possible. If they cannot be avoided, stubs should be no greater than 200mils.
and
General USB Layout Guidelines
Figure 5
USB D+ and D- High-Speed Traces
USB VBUS Traces
USB Receptacle Connections
depict possible connections for VBUS. Point A, marked in each figure, is where a 5V version of VBUS
(5V)
(5V)
MCF548x ColdFire
Figure 4. Preferred VBUS Connections
Figure 5. Alternate VBUS Connections
A
A
8.2k
50k
20k
(3.3V)
(3.3V)
B
B
®
Microprocessor, Rev. 4
50k
50k
MCF548x
MCF548x
50k
50k
Freescale Semiconductor