H8SX1653 Datasheet, PDF (841/1018 Pages) Renesas Technology Corp – Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

Section 20 Flash Memory (0.18-µm F-ZTAT Version)
20.7.2 USB Boot Mode
USB boot mode executes programming/erasing of the user MAT by means of the control
command and program data transmitted from the externally connected host via the USB.
In USB boot mode, the tool for transmitting the control command and program data, and the
program data must be prepared in the host. The system configuration in USB boot mode is shown
in figure 20.9. Interrupts are ignored in USB boot mode. Configure the user system so that
interrupts do not occur.
Host or
self-power HUB
PM4
This LSI
PM2
MD2 to MD0
1.5 kΩ
Rs
Programming tool
and program data
Rs
Data transmission/
reception
Software for
analyzing
control
commands
(on-chip)
USB+
USB-
USB
VBUS
Flash
memory
On-chip
RAM
PM3
1
010
0: Self power setting
1: Bus power setting
Figure 20.9 System Configuration in USB Boot Mode
Rev.1.00 Sep. 08, 2005 Page 793 of 966
REJ09B0219-0100