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CHAPTER 8 USB FUNCTION
User’s Manual U12978EJ3V0UD
153
Figure 8-34. Flow Chart of Bit Strip Control Operation
Y
Y
Y
N
N
Idle state
Idle state
Receive bit input
Shift bit
stuffing register
Receive bit input
Bit stuffing error output
Disable
USBPOB increment
Reception start?
Receive bit = 1?
N
Y
Y
N
Bit stuffing register
= 3FH?
Was
EOP receive signal
set?
Was
EOP receive signal
set?
Reset bit
stuffing register
Y
N
Receive bit = 1?
Reset bit
stuffing register
N
1
1