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Figure 8-25. Flowchart of Transmit/Receive Pointer Operation (4/7)
(2) Data/Handshake packet reception (2/2)
DBYER: Bit 5 of data/handshake packet receive result store register (DRXRSL)
CHAPTER 8
USB FUNCTION
2
EOP
Bit normal write?
Y
Y
Does bit stuffing
signal = 1?
N
USBPOB increment
N
USBPOB
overflow?
Y
USBPOW increment
Y
USBPOW
= 71H?
N
USBPOB increment
EOP
N
received normally?
Y
Idle state
User's Manual U12978EJ3V0UD
Set DBYER flag
Idle state
1
Set DBYER flag
Idle state
143
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