Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
REJ09B0140-0900 Rev. 9.00 Page 567 of 846
Sep 16, 2010
H8S/2215 Group
USB function Firmware
Receive OUT token
Transmit data from host
Set EP2o data ready status
(EP2oREADY in UIFR1 = 1)
Clear EP2o data ready status
(EP2oREADY in UIFR1 = 0)
Read USB endpoint receive
data size register 2o (UESZ2o)
Read data from USB endpoint
data register 2o (UEDR2o)
Write 1 to EP2o read
complete bit
(EP2oRDFN in UTRG0 = 1)
Space
in EP2oFIFO?
No
Yes
Both
EP2oFIFOs empty?
No
Yes
NAK
ACK
EXIRQx
EXIRQx
Figure 15.20 EP2o Bulk-Out Transfer Operation