Section 18 Universal Serial Bus Interface (USB)
Rev. 3.00 Jan 25, 2006 page 607 of 872
REJ09B0286-0300
USB Host
Send an OUT data
packet (8 bytes)
Receive an ACK
handshake packet
USB Function Core
Slave CPU
Core Interface
Automatically set
each flag
*
1
Request an USBIA
interrupt (SETUP)
Initiate the USBIA
interrupt processing
Read USBIFR0
*
2
Store the information
indicating that the decode
must be performed by
the EP0OTS interrupt to
be generated in
the following sequence
in user memory
Clear the SETUPF bit
of USBIFR0 to 0
Write data to EP0O
FIFO
Command data decode
Check if decode by
the slave CPU is
required or not
Send ACK
to the host CPU
Send ACK
to the slave CPU
Modify FVSR0O
Clear EP0OTC bit of
USBCSR0 to 0
Request an USBID
interrupt (EP0OTF)
Initiate the USBID
interrupt processing
Read USBIFR0 and
check the TS interrupt
occurrence
Read TSFR0 and check
the EP0OTS interrupt
occurrence
Check if the command
decode by the slave
CPU is required by
the stored information
Complete the USBIA
interrupt processing
Notes: 1. Set the EP0OTC bit of USECSR0 to 1, initialize FVSR0I and FVSR0O, clear the EP0ITS and EP0OTS bits of TSFR0 to 0,
clear the EP0ITF and EP0OTF bits of TFFR to 0, and clear the EP0STL bit of EPSTLR0 to 0.
2. Since a USBIA interrupt is only assigned to a SETUP interrupt, interrupt source determination process is not required.
Send a SETUP
token packet
Receive a SETUP
token packet
Receive an OUT data
packet (8 bytes)
Modify FVSR0O
Clear the EP0OTS bit
of TSFR0 to 0
Complete the USBID
interrupt processing
Read EPDR0O
If the instruction is
Control-OUT, set
the EP0OTC bit of
USBCSR0 to 1 (write 1
to EP0OTC after
EP0OTC = 1 was read)
Check the instruction
by data decode
Read FVSR0O and
check if the EP0 FIFO
contains 8-byte data
Figure 18.3 Operation on Receiving a SETUP Token (When Decode by the Slave CPU Is
Required and When SETICNT = 0)
Содержание H8S/2158
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Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...