H8SSLASH2218 datasheet(513/750 Pages) RENESAS

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Section 14 Universal Serial Bus (USB)

Rev.6.00 Jun. 03, 2008 Page 465 of 698

REJ09B0074-0600

Section 14 Universal Serial Bus (USB)

This LSI incorporates a USB function module complying with USB standard version 1.1. Figure

14.1 shows the block diagram of the USB.

14.1

Features

• USB standard version 2.0 full speed mode (12 Mbps) support

• Bus-powered mode or self-powered mode is selectable via the USB specific pin (UBPM)

• On-chip PLL circuit to generate the USB operation clock (24 MHz × 2 = 48 MHz, 16 MHz × 3

= 48 MHz)

• On-chip bus transceiver

• Standard commands are processed automatically by hardware

⎯ Only Set_Descriptor, Get_Descriptor, Class/VendorCommand, and SynchFrame

commands should be processed by software

• Current Configuration value can be checked by Set_Configuration interrupt

• Three transfer modes supported (Control, Bulk, Interrupt)

• Configuration of four endpoints; EP0, EP1, EP2, and EP3

Configuration 1

Interface0

Alternate 0

Total 456-byte FIFO incorporated

EP0s (Control_setup transfer, FIFO 8 bytes)

EP0i (Control_in transfer, FIFO 64 bytes)

EP0o (Control_out tranfer, FIFO 64 bytes)

EP1 (Bulk_in transfer, FIFO 64 bytes

× 2 [dual-buffer confifugraion])

EP2 (Bulk_out transfer, FIFO 64 bytes

× 2 [dual-buffer confifugraion])

EP3 (Interrup_in transfer, FIFO 64 bytes)

• 16 kinds of interrupts

⎯ Suspend/resume interrupt source can be assigned for IRQ6

⎯ Each interrupt source except the suspend/resume interrupt source can be assigned for

EXIRQ0 or EXIRQ1 via registers

• DMA transfer interface

⎯ DMA transfer is enabled for the Bulk transfer data of EP1 and EP2

• 8-bit bus (3 cycle access timing) connected to the external bus interface

⎯ Internal registers are addressed to a part of area 6 of external address (H'C00000 to

H'DFFFFF)

⎯ Address H'C00100 to H'DFFFFF is for USB reserved area and thus access prohibited.

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