Datasheet

Section 25 Flash Memory
Rev. 2.00 Aug. 20, 2008 Page 952 of 1198
REJ09B0403-0200
(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)
(Erasure completion)
(Erasure selection
c
ommand 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
1.
2.
3.
4.
(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.