H8SSLASH2218 datasheet(515/750 Pages) RENESAS

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Section 14 Universal Serial Bus (USB)

Rev.6.00 Jun. 03, 2008 Page 467 of 698

REJ09B0074-0600

14.2

Input/Output Pins

Table 14.1 shows the USB pin configuration.

Table 14.1

Pin Configuration

Pin Name

I/O

Function

USD+

USD-

I/O

I/O pin for USB data

DrVCC

Input

USB internal transceiver power supply pin

DrVSS

Input

USB internal transceiver ground pin

VBUS

Input

USB cable connection/disconnection detection signal pin

UBPM

Input

USB bus-powered/self-powered mode set pin

When USB is used in bus-powered mode,

UBPM must be fixed low.

When USB is used in self-powered mode,

UBPM must be fixed high.

USPND

Output

USB suspend output pin

When USB enters the suspend state, USPND is set to high.

14.3

The USB has the following registers.

• USB control register (UCTLR)

• USB DMAC transfer request register (UDMAR)

• USB device resume register (UDRR)

• USB trigger register 0 (UTRG0)

• USB FIFO clear register 0 (UFCLR0)

• USB endpoint stall register 0 (UESTL0)

• USB endpoint stall register 1 (UESTL1)

• USB endpoint data register 0s (UEDR0s) [for Setup data reception]

• USB endpoint data register 0i (UEDR0i) [for Control_in data transmission]

• USB endpoint data register 0o (UEDR0o) [for Control_out data reception]

• USB endpoint data register 3 (UEDR3) [for Interrupt_in data transmission]

• USB endpoint data register 1 (UEDR1) [for Bulk_in data transmission]

• USB endpoint data register 2 (UEDR2) [for Bulk_out data reception]

• USB endpoint receive data size register 0o (UESZ0o) [for Control _out data reception]

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