upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 365

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upd78f0730

Manufacturer Part Number
upd78f0730
Description
8-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet

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(3) CPUDEC request for control transfer
Remarks 1. n = 0, 1
The CPUDEC request can be classified into three types of processing: control transfer (write), control transfer
(read), and control transfer (without data). Control transfer (write) indicates a request that uses the OUT
transaction in the data stage (e.g., SET_DESCRIPTOR), and control transfer (read) indicates a request that
uses the IN transaction in the data stage (e.g., GET_DESCRIPTOR). Control transfer (without data) indicates
a request that has no data stage (e.g., SET_CONFIGURATION).
The flowcharts are shown below.
2. ♦: Processing by hardware
Figure 12-19. CPUDEC Request for Control Transfer (1/12)
CPUDECM = 1 (UF0IM1)
CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Reading UF0ISn register
Decoding FW request
STGM = 0 (UF0IM1)
Reading UF0E0ST
INTUSB0B
register × 8 times
CPUDEC = 1?
CPUDEC = 0
PROTC = 0
(UF0IS1)
(UF0IC1)
(UF0IS1)
START
Preliminary User’s Manual U19014EJ1V0UD
A
Yes
active
(a) Token phase (1/2)
No
Appropriate interrupt servicing
E
G
365

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