Datasheet

Section 17 Flash Memory (F-ZTAT Version)
Rev.7.00 Dec. 24, 2008 Page 574 of 698
REJ09B0074-0700
Table 17.7 USB Boot Mode Operation
Item Host Operation Operation of this LSI
Branches to boot program
after reset start
Start of USB boot mode Transmits one H'55 byte on
completion of USB enumeration
Transmits one H'AA byte to
host on reception of H'55
Transfer clock information Transmits frequency (2 bytes),
number of multiplication
Classification (1 byte), multiplication
ratio (1 byte)
With 16 MHz system clock, H'0640,
H'01, H'01 are transmitted
With 24 MHz system clock, H'0960,
H'01, H'01 are transmitted
If received data are within
respective ranges, transmits
H'AA to host
If any received data is out-of-
ranges, transmits H'FF to host
and halts operation
Transfer number of bytes
(N) of programming control
program
Performs 2-byte transfer number of
bytes (N) of programming control
program
If received number of bytes is
within ranges, transmits H'AA
to host
If received number of bytes is
out-of- ranges, transmits H'FF
to host and halts operation