H8SXSLASH1663R datasheet(1177/1504 Pages) RENESAS

1177 / 1504 page

Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1145 of 1468

REJ09B0412-0200

(2)

State Transition Diagram

The state transition after USB boot mode is initiated is shown in figure 25.10.

Boot mode initiation

(reset by boot mode)

All user MAT erasure

Enumeration

Inquiry command reception

Inquiry command response

H'55

reception

Processing of inquiry

setting command

Wait for inquiry

setting command

Read/check command reception

Command response

(Programming

completion)

(Program selection

command reception)

(Erasu

re completion)

(Erasure

selec

tion

command

reception)

(Program data transmission)

Processing of

read/check command

Wait for inquiry

programming/erasing

command

Wait for inquiry

programming/erasing

command

Wait for inquiry

programming/erasing

command

(Erase-block specification)

Figure 25.10

USB Boot Mode State Transition Diagram

1. After a transition to the USB boot mode is made, the boot program embedded in this LSI is

initialized. This LSI performs enumeration to the host after the USB boot program is

initialized.

2. Inquiry information about the size, configuration, start address, and support status of the user

MAT is transmitted to the host.

3. After inquiries have finished, all user MAT are automatically erased.

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