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(5) No data control
Packet flow
Packet from
host controller
Setup
SETUP
stage
DATA0
Status
stage
No data
IN
control
ACK
134
CHAPTER 8
USB FUNCTION
Packet from
Operation of host
µ
PD789800
controller
ACK
DATA1
User's Manual U12978EJ3V0UD
Request
IN packet
ACK packet
Operation of USB
µ
function of PD789800
ACK transmission
reservation
• ACK transmission
• DATA1 transmission
reservation
DATA1 transmission
NAK transmission
reservation
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