MC9S08JM16CGTE FREESCALE [Freescale Semiconductor, Inc], MC9S08JM16CGTE Datasheet - Page 300

• Manufacturer Part Number: MC9S08JM16CGTE
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Universal Serial Bus Device Controller (S08USBV1)
17.2
The USB module requires both data and power pins.
17.2.1
USBDP is the positive USB differential signal. In a USB peripheral application, connect an external
33 Ω ±1% resistor in series with this signal in order to meet the USB Specification Rev. 2.0 impedance
requirement.
17.2.2
USBDN is the negative USB differential signal. In a USB peripheral application, connect an external
33 Ω ±1% resistor in series with this signal in order to meet the USB Specification, Rev. 2.0 impedance
requirement.
17.2.3
V
of 3.3 V and can only source enough current for USB internal transceiver (XCVR) and USB pullup
resistor. If the VREG is disabled by software, the application must input an external 3.3 V power supply
to the USB module via V
17.3
This section describes the memory map and control/status registers for the USB module.
300
USB33
Positive USB differential signal
Negative USB differential signal
USB voltage regulator power pin
is connected to the on-chip 3.3 V voltage regulator (VREG). V
External Signal Description
Register Definition
USBDP
USBDN
V
Name
USB33
USB33
.
USBDN
USBDP
V
MC9S08JM16 Series Data Sheet, Rev. 2
Port
USB33
Table 17-3. USB External Pins
Direction
Power
I/O
I/O
Table 17-3
Differential USB signaling.
Differential USB signaling.
3.3 V USB voltage regulator output
or 3.3 V USB transceiver/resistor
supply input.
describes each of the USB external pin
Function
USB33
maintains an output voltage
Freescale Semiconductor
Reset State
impedance
impedance
High
High
—