DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 529
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DF2211NP24V
Manufacturer Part Number
DF2211NP24V
Description
H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
Manufacturer
Renesas Technology / Hitachi Semiconductor
Datasheet
1.DF2211NP24V.pdf
(756 pages)
- Current page: 529 of 756
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14.3.5
UFCLR0 is a one-shot register used to clear the FIFO for each endpoint EP0 to EP3. Writing 1 to a
bit clears the data in the corresponding FIFO.
For IN FIFO, writing 1 to a bit in UFCLR0 clears the data for which the corresponding PKTE bit
in UTRG0 is not set to 1 after data write, or data that is validated by setting the corresponding
PKTE bit in UTRG0.
For OUT FIFO, writing 1 to a bit in UFCLR0 clears data that has not been fixed during reception
or received data for which the corresponding RDFN bit is not set to 1. Accordingly, care must be
taken not to clear data that is currently being received or transmitted. EP1 and EP2, having a dual-
FIFO configuration, are cleared by entire FIFOs. Note that this trigger does not clear the
corresponding interrupt flag. For details, see section 2.9.4, Accessing Registers Containing Write-
Only Bits.
Bit
7, 6
5
4
3
2
1
Bit Name
—
EP2CLR
EP1CLR
EP3CLR
EP0oCLR
EP0iCLR
USB FIFO Clear Register 0 (UFCLR0)
Initial Value R/W
All 0
0
0
0
0
0
R
W
W
W
W
W
Description
Reserved
These bits are always read as 0 and cannot be
modified.
EP2 Clear*
0: Performs no operation.
1: Clears EP2 OUT FIFO.
EP1 Clear
0: Performs no operation.
1: Clears EP1 IN FIFO.
EP3 Clear
0: Performs no operation.
1: Clears EP3 IN FIFO.
EP0o Clear
0: Performs no operation.
1: Clears EP0o OUT FIFO.
EP0i Clear
0: Performs no operation.
1: Clears EP0i IN FIFO.
Rev.7.00 Dec. 24, 2008 Page 475 of 698
REJ09B0074-0700
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