NEC mPD78F0730, Preliminary User'S Manual

Page: 342 / 518

CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
342
(7) UF0 interface 0 register (UF0IF0)
This register stores the value that is to be returned in response to the GET_INTERFACE wIndex = 0 request.
This register is read-only, in 8-bit units.
When the SET_INTERFACE request is received, its wValue is automatically written to this register.
If the SET_INTERFACE request is processed by FW, wIndex and wValue are decoded, and the setting of
endpoint is automatically changed. At this time, the status bit of the target endpoint and DPID are
automatically cleared to 0, depending on the setting. The FIFO is not cleared automatically.
Caution Do not perform write access to this register. Operation is not guaranteed if this register is
written.
0 UF0IF0 0
5
0 0
3
0
2
IF02
1
IF01 IF00
Address
FF92H
After reset
00H
0 4 6 7
Bit position Bit name Function
2 to 0 IF02 to IF00 These bits hold the data to be returned in response to GET_INTERFACE wIndex = 0
request.
Downloaded from Elcodis.com electronic components distributor