h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 373

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

12.5
12.5.1
If the USB cable enters the connection state from the disconnection state, perform the operation as
shown in figure 12.2.
MODE MN 0/1 in IFR0 = 00
MODE MN 0/1 in IFR0 = 01
MODE MN 0/1 in IFR0 = 11
MODE MN 0/1 in IFR0 = 10
USB cable connection
VBUS MN in IFR0 = 1
USVBUS pin = High
VBUS F in IFR0 = 1
Receive bus reset
During USB cable
BRST in IFR0 = 1
High-speed mode
Is charp received?
Transmit charp
disconnection
D+ pull-up on
USB Cable Connection
Communication Operation
Yes
Wait for control transfer
USB function
No
Figure 12.2 USB Cable Connection
MODE MN 0/1 in IFR0 = 01
Full-speed mode
Interrupt generated
Interrupt generated
Rev. 2.00, 03/04, page 341 of 534
Clear all FIFOs (EP0i/0o/1/2/3
(PULLUPE in CTRL = 1)
Write 1 to PULLUPE bit
(VBUS F in IFR0 = 0)
(BRST in IFR0 = 0)
CLR in FCLR0 = 1)
Clear interrupt flag
Clear interrupt flag
Firmware