Rev. 3.0, 03/01, page 188 of 390
Status Register (SR) [cont’d]
Bit
Description
Default
15
Reserved
0
14
IRQ from CS4271 (IR71): This bit 1 indicates that CS4271 issues interrupt request.
0
13
TX FIFO Not Full Flag (TNF)
0: TX FIFO is full.
1: TX FIFO is not full.
1
12 - 11
TX FIFO Status(TFS)
RFS[1:0] FIFO-1 FIFO-0
00 empty empty
01 empty not empty
10 not empty empty
11 not empty not empty
0
10
TX FIFO under run (TFU): This bit 1 indicates that TX FIFO is underrun.
Writing 1 to this bit will clear this bit.
0
9
TX FIFO over run (TFO): This bit 1indicates that TX FIFO is overrun.
Writing 1 to this bit will clear this bit.
0
8
TX Done Interrupt (TDI): 1 indicates that one block of Transmitting FIFO has been written
to CODEC. Writing 1 to this bit will clear this bit.
0
7, 6
Reserved
-
5
RX FIFO Not Empty Flag (RNE)
0: RX FIFO is empty.
1: RX FIFO is not empty.
0
4, 3
RX FIFO Status(RFS)
RFS[1:0] FIFO-1 FIFO-0
00 not full not full
01 not full full
10 full not full
11 full full
0
2
RX FIFO under run (RFU): This bit 1 indicates that RX FIFO is underrun
Writing 1 to this bit will clear this bit.
0
1
RX FIFO over run (RFO): This bit 1 indicates that RX FIFO is overrun.
Writing 1 to this bit will clear this bit.
0
0
RX Done Interrupt (RDI): This bit 1 indicates that one block of receiving FIFO has been
filled by CODEC. Writing 1 to this bit will clear this bit.
0
Summary of Contents for HD64465
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