SH7763 Datasheet, PDF (1625/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

36.4 Operation
36.4.1 Cable Connection
Section 36 USB Function Controller (USBF)
Application
USB function
Cable disconnected
USBF_VBUS pin = 0 V
UDC core reset
USB cable connection
VSBHSC/PS = 1
Select USB transceiver
Write 50-byte endpoint
information to EPIR
USB module interrupt
setting
Initial
settings
No
USB_PWREN = 1?
Yes
IFR0/VBUSF = 1,VBUSMN= 1
USB bus connection or
disconnection detection interrupt
Interrupt request
As soon as preparations are
completed, enable D+ pull-up
by USBF_UPLUP
Clear VBUS flag
(IFR0/VBUSF)
UDC core reset release
Firmware preparations for
start of USB communication
IFR0/CFDN = 1
Endpoint information
load complete interrupt
Bus reset reception
IFR0/BRST = 1
Bus reset interrupt
Interrupt request
Clear bus reset flag
(IFR0/BRST)
Wait for setup command
reception complete interrupt
Clear FIFOs
Wait for setup command
reception complete interrupt
Figure 36.3 Cable Connection Operation
Rev. 1.00 Oct. 01, 2007 Page 1559 of 1956
REJ09B0256-0100