r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 980

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 USB Function Module (USB)
16.5
16.5.1
Rev. 1.00 Sep. 19, 2008 Page 950 of 1342
REJ09B0467-0100
Power-on reset state canceled
Operation
Initial Settings
48-MHz USB clock
supply started
USB function
Figure 16.2 Initial Setting Operation
With a software timer, and so on, wait for
48-MHz USB clock oscillation to be
settled. (t
Set the multiplication ratio for the USB
PLL frequency.
(USSTC1 and USSTC0 in USPLLCR)
Cancel 48-MHz USB clock module
stop mode.
(Clear MSTP17 in EXMSTPCRL to 0.)
Cancel USB system clock module
stop mode.
(Clear MSTP18 in EXMSTPCRL to 0.)
Set the endpoint information to
endpoint information register (EPIR).
Cancel reset state in the protocol
processing block.
(Clear PRTRST in CTLR to 0.)
Wait for USB cable connection.
Insert a 26-state dummy cycle.
USOSC
Application
)