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Section 22 USB Function Module (USB)
Figure 22.1 shows the block diagram of the USB.
Peripheral bus
Interrupt requests
Clock for USB
(48 MHz)
[Legend]
UDC: USB device controller
22.2
Input/Output Pins
Table 22.1 shows the USB pin configuration.
Table 22.1 Pin Configuration
Pin Name
I/O
VBUS
Input
USD+
I/O
USD-
I/O
DrVcc
Input
DrVss
Input
PUPDPLS
Output
UXTAL
Input
UEXTAL
Input
UXSEL
Input
Rev. 1.00 Mar. 12, 2008 Page 834 of 1178
REJ09B0403-0100
USB function module
Status and
control registers
FIFO
Figure 22.1 Block Diagram of USB
Function
USB cable connection monitor pin
USB data I/O pin
USB data I/O pin
Power supply pin for USB built-in transceiver
Ground pin for USB built-in transceiver
Pull-up control pin
USB clock pin
USB clock pin
USB clock select pin
UDC
Transceiver
D+
D-
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