TWR-MCF51JF-KIT Freescale Semiconductor, TWR-MCF51JF-KIT Datasheet - Page 14

• Manufacturer Part Number: TWR-MCF51JF-KIT
• Description: MCF51JF Tower Kit
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®r
• Type: MCUr

Specifications of TWR-MCF51JF-KIT

• Rohs Compliant: YES
• Contents: Board
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: MCF51JF128

2.12 USB
The MCF51JF features a USB full-speed/low-speed OTG/Host/Device controller with built-in
transceiver. The TWR-MCF51JF routes the USB D+ and D- signals from the MCF51JF MCU to either the
on-board USB connector (J15) or the Tower Primary Connector (allowing the connection to external
USB connectors or additional circuitry on a Tower peripheral module) depending on the value of four
optional resistors: R17/R18 and R20/R21. By default, R17 and R18 are not populated and R20 and R21
are. This connects the MCF51JF USB signals to the on-board USB circuit.
A power supply switch with an enable input signal and over-current flag output signal is used to supply
power to the USB connector when the MCF51JF is operating in host mode. Port pin PTC0 is connected
to the flag output signal and port pin PTB7 is used to drive the enable signal. Both port pins can be
isolated with jumpers if needed.
TWRMCF51JFUM
TWR-MCF51JF Tower Module User's Manual
Figure 9. USB dual-role interface
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin
Electrode 3
Electrode 4
Electrode 5
Electrode 6
Electrode 7
Electrode 8
Electrode 9
Electrode 10
Electrode 11
ADC: TWRPI ID 0
ADC: TWRPI ID 1
GND
Reset
Description
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