CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
Preliminary User’s Manual U19014EJ1V0UD
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(6) UF0 configuration register (UF0CNF)
This register stores the value that is to be returned in response to the GET_CONFIGURATION request.
This register is read-only, in 8-bit units.
When the SET_CONFIGURATION request is received, its wValue is automatically written to this register.
When a change of the value of this register from 00H to other than 00H is detected, the CONF bits of
UF0MODS register are set to 1. If the SET_CONFIGURATION request is processed by FW, the status of this
register is immediately reflected on the UF0MODS register as soon as data has been written to this register
(CONF bits = 1 before completion of the status stage).
Caution Do not perform write access to this register. Operation is not guaranteed if this register is
written.
0
UF0CNF
0
5
0
0
3
0
2
0
1
CONF1
CONF0
Address
FF91H
After reset
00H
0
4
6
7
Bit position
Bit name
Function
1, 0
CONF1,
CONF0
These bits hold the data to be returned in response to the GET_CONFIGURATION
request.
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