DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 628

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

Table 17.7 USB Boot Mode Operation
Rev.7.00 Dec. 24, 2008 Page 574 of 698
REJ09B0074-0700
Item
Start of USB boot mode
Transfer clock information
Transfer number of bytes
(N) of programming control
program
Host Operation
Transmits one H'55 byte on
completion of USB enumeration
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
Performs 2-byte transfer number of
bytes (N) of programming control
program
Operation of this LSI
Branches to boot program
after reset start
Transmits one H'AA byte to
host on reception of H'55
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
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