Section 18 Universal Serial Bus Interface (USB)
Rev. 3.00 Jan 25, 2006 page 610 of 872
REJ09B0286-0300
18.4.3
Operation on Receiving an OUT Token (Endpoints 0, 2, and 5)
Figures 18.6 to 18.9 show the USB function core and LSI firmware operations when the USB
function core receives an OUT token (OUT transaction). An OUT transaction is used for data
stage and status stage of control transfer, interrupt transfer, and bulk transfer.
USB Host
USB Function Core
Slave CPU
Core Interface
Note:
*
When an EP2TS interrupt is specified as a USBIB or USBIC interrupt according to the INTSELR0 setting, the corresponding
interrupt occurs. In this case, if a USBIB or USBIC interrupt occurs, interrupt source determination process is not required.
(Note that TSFR0 must be accessed to clear the flags.)
Receive an OUT
token packet
Receive an ACK
handshake packet
Write data to EP2 FIFO
Send ACK to
the host
Send ACK to
the slave CPU
Modify FVSR2
Request an USBID
interrupt (EP2TS)
Initiate the USBID
interrupt processing
Read USBIFR0 and check
if a TS interrupt occurs
or not
Read TSFR0 and check if
an EP2TS interrupt occurs
or not
Read FVSR2 and check
if the EP2 FIFO contains
8-byte data
Read EPDR2
Modify FVSR2
Clear the EP2TS bit of
TSFR0 to 0
Complete the USBID
interrupt processing
Send an OUT
token packet
Send an OUT data
packet (8 bytes)
Receive an OUT data
packet (8 bytes)
Figure 18.6 Operation on Receiving an OUT Token (EP2-OUT: Initial FIFO Is Empty)
Summary of Contents for H8S/2158
Page 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Page 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Page 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Page 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Page 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Page 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Page 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Page 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Page 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Page 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Page 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Page 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Page 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Page 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Page 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Page 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Page 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Page 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Page 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...