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Figure 8-25. Flowchart of Transmit/Receive Pointer Operation (6/7)
(3) Data packet transmit (2/2)
Y
N
Y
N
Y
CHAPTER 8
2
Bit Read
Does bit stuff
signal = 1?
N
USBPOB increment
USBPOB
overflow?
Y
Set USBPOW to 70H
Read CRC
redundant bit
Does bit stuffing
signal = 1?
N
USBPOB increment
USBPOB
overflow?
Y
USBPOW increment
USBPOW
= 71H?
N
3
User's Manual U12978EJ3V0UD
USB FUNCTION
3
Set EOP
transmit signal
Idle state
145
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