H8SSLASH2218 datasheet(619/750 Pages) RENESAS

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Section 17 Flash Memory (F-ZTAT Version)

Rev.6.00 Jun. 03, 2008 Page 571 of 698

REJ09B0074-0600

17.6.2

USB Boot Mode (HD64F2218U, HD64F2212U, and HD64F2211U)

• Features

⎯ Selection of bus-powered mode or self-powered mode

⎯ Supports the USB operating clock generation by 16 MHz system clock with PLL3

multiplication (FWE = 1, MD2 to MD0 = 011) or 24 MHz system clock with PLL2

multiplication (FWE = 1, MD2 to MD0 = 010)

⎯ D+ pull up control connection supported for P36 pin only

⎯ See table 17.6 for enumeration information

Table 17.6

Enumeration Information

USB Standard

Ver.1.1

Transfer modes

Control (in, out), Bulk (in, out)

Maximum power

Self power mode (

UBPM pin = 1)

100 mA

Bus power mode (

UBPM pin = 0)

500 mA

Endpoint configuration

EP0 Control (in, out) 64 bytes

Configuration 1

Interface Number 0

Alternate Setting 0

EP1 Bulk (in) 64 bytes

EP2 Bulk (out) 64 bytes

• Notes on USB Boot Mode Execution

⎯ Specify 16 MHz or 24 MHz system clock and the FWE and MD2 to MD0 pins correctly.

⎯ Use the P36 pin for D+ pull-up control connection.

⎯ To ensure stable power supply during flash memory programming/erasing, do not use cable

connection via a bus powered HUB.

⎯ Note in particular that, in the worst case, the LSI may be permanently damaged if the USB

cable is detached during flash memory programming/erasing.

⎯ A transition is not made to power-down modes even if the USB bus enters suspend mode

when in bus power mode.

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