Pin Configuration For Usb; Table 28-2 Pin Configuration For Usb Module - Motorola DragonBall MC9328MX1 Reference Manual

USB Device Port
USBD_SUSPND—Transceiver Suspend Enable. This signal, when high, activates a low-power
•
state in the USB transceiver. Normally, when suspended, the transceiver drives USBD_RCV low
and tri-state the USB bus signals D+ and D-.
USBD_RCV—USB Module Receive Data. This signal is a CMOS level driven signal provided by
•
the external USB transceiver. The signal is derived from the D+ and D- differential input to the
transceiver.
USBD_VP—Input D+ signal connected directly to the D+.
•
• USBD_VM—Input D- signal connected directly to the D-.

28.2.7 Pin Configuration for USB

Table 28-2 lists the pins used by the USB module. These pins are multiplexed with other functions on the
device and must be configured for USB operation.
The user must ensure that the data direction bits in the GPIO are set to the
correct direction for proper operation. See Section 32.5.1, "Data Direction
Registers," on page 32-9 for details.
Pin
USBD_AFE Primary function of
GPIO Port B [20]
USBD_SUSPND Primary function of
GPIO Port B [23]
USBD_VMO Primary function of
GPIO Port B [27]
USBD_VPO Primary function of
GPIO Port B [26]
USBD_OE Primary function of
GPIO Port B [21]
USBD_VM Primary function of
GPIO Port B [25]
USBD_VP Primary function of
GPIOP Port B [24]
USBD_RCV Primary function of
GPIO Port B [22]
28-6
NOTE:
Table 28-2. Pin Configuration for USB Module
Setting
1.Clear bit 20 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 20 of Port B General Purpose Register (GPR_B)
1.Clear bit 23 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 23 of Port B General Purpose Register (GPR_B)
1.Clear bit 27 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 27 of Port B General Purpose Register (GPR_B)
1.Clear bit 26 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 26 of Port B General Purpose Register (GPR_B)
1.Clear bit 21 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 21 of Port B General Purpose Register (GPR_B)
1.Clear bit 25 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 25 of Port B General Purpose Register (GPR_B)
1.Clear bit 24 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 24 of Port B General Purpose Register (GPR_B)
1.Clear bit 22 of Port B GPIO In Use Register (GIUS_B)
2.Clear bit 22 of Port B General Purpose Register (GPR_B)
MC9328MX1 Reference Manual
Configuration Procedure
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