Figure 38: Audio Fifo - Analog Devices Advantiv ADV7604 Hardware Manual

FIFO_UNDERFLO_RAW , IO Map, Address 0x79, [6]
Function
FIFO_UNDERFLO_RAW
0
1
FIFO_OVERFLO_RAW , IO Map, Address 0x79, [5]
Function
FIFO_OVERFLO_RAW
0
1
FIFO_NEAR_UFLO_RAW , IO Map, Address 0x7E, [0]
Function
FIFO_NEAR_UFLO_RA
W
0
1
Rev. F August 2010
Address Order
Empty
.
.
.
Empty
Steoro Data N-1
Stereo Data N-2
.
.
.
Steoro Data 1
Steoro Data 0
Empty
Empty

Figure 38: Audio FIFO

Description
Audio FIFO has not underflowed.
Audio FIO read pointer has reached the write pointer causing the
audio FIFO to underflow.
Reset to 0 by setting FIFO_UNDERFLO_CLR (IO Map, Address
0x76[6]) to 1.
Description
Audio FIFO has not overflowed.
Audio FIO write pointer has reached the read pointer causing the
audio FIFO to overflow.
Reset to 0 by setting FIFO_OVERFLO_CLR (IO Map, Address
0x76[5]) to 1.
Description
Audio FIFO is not near underflow.
Audio FIFO is near underflow as the number of FIFO registers
containing stereo data is less or equal to value set in
AUDIO_FIFO_ALMOST_EMPTY_THRESHOLD.
Reset to 0 by setting FIFO_NEAR_UFLO_CLR (IO Map,
Address 0x7B[0]) to 1.
134
Address 63
Write Pointer
Address N+2
Address N+1
Address N
Address 3
Read Pointer
Address 2
Address 1
Address 0
ADV7604