h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 374

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

As not shown in figure 12.2, when the MODE F bit in IER0 is set to 1 and the MODE MN0 and
MODE MN1 bits in IFR0 are changed, an interrupt occurs. This interrupt can be used to manage
the bulk maximum packet size and descriptor information.
12.5.2
If the USB cable enters the disconnection state from the connection state, perform the operation as
shown in figure 12.3.
As not shown in figure 12.3, when the MODE F bit in IER0 is set to 1 and the MODE MN0 and
MODE MN1 bits in IFR0 are changed, an interrupt occurs.
Rev. 2.00, 03/04, page 342 of 534
USB Cable Disconnection
Wait for USB cable connection
During USB cable connection
MODE MN 0/1 in IFR0 = 01
MODE MN 0/1 in IFR0 = 10
MODE MN 0/1 in IFR0 = 00
MODE MN 0/1 in IFR0 = 00
USB cable disconnection
VBUS MN in IFR0 = 0
In high-speed mode:
VBUS F in IFR0 = 1
In full-speed mode:
USVBUS pin = low
D+ pull-up off
USB function
Figure 12.3 USB Cable Disconnection
Interrupt generated
(PULLUPE in CTRL = 0)
Write 0 to PULLUPE bit
(VBUS F in IFR0 = 0)
Clear interrupt flag
Firmware