saa7146a NXP Semiconductors, saa7146a Datasheet - Page 25

• Manufacturer Part Number: saa7146a
• Description: Multimedia Bridge, High Performance Scaler And Pci Circuit Spci
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 6 Arbitration control registers
Table 7 Burst length definition
Table 8 Threshold definition
Note
1. The threshold is reached, if the FIFO contains at least this number of Dwords.
2004 Aug 25
48
4C
000
001
010
011
100
101
110
111
00
01
10
11
OFFSET
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
VALUE
(HEX)
VALUE
BurstDebi
Burst3
Thresh3
Burst2
Thresh2
Burst1
Thresh1
BurstA1_in
ThreshA1_in
BurstA1_out
ThreshA1_out
BurstA2_in
ThreshA2_in
BurstA2_out
ThreshA2_out
4 Dwords of valid data
8 Dwords of valid data
16 Dwords of valid data
32 Dwords of valid data
NAME
VIDEO
28 to 26
20 to 18
17 to 16
12 to 10
9 to 8
4 to 2
1 and 0
28 to 26
25 to 24
20 to 18
17 and 16 RW
12 to 10
9 and 8
4 to 2
1 and 0
1 Dword
2 Dwords
4 Dwords
8 Dwords
16 Dwords
32 Dwords
64 Dwords
128 Dwords
WRITE MODE
BIT
1 Dword of valid data
4 Dwords of valid data
8 Dwords of valid data
16 Dwords of valid data
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
TYPE
(1)
AUDIO
PCI burst length of the DEBI DMA channel; see Table 7
PCI burst length of video Channel 3; see Table 7
threshold of FIFO 3; see Table 8
PCI burst length of video Channel 2; see Table 7
threshold of FIFO 2; see Table 8
PCI burst length of video Channel 1; see Table 7
threshold of FIFO 1; see Table 8
PCI burst length of audio input Channel 1; see Table 7
threshold of audio FIFO A1_in; see Table 8
PCI burst length of audio output Channel 1; see Table 7
threshold of audio FIFO A1_out; see Table 8
PCI burst length of audio input Channel 2; see Table 7
threshold of audio FIFO A2_in; see Table 8
PCI burst length of audio output Channel 2; see Table 7
threshold of audio FIFO A2_out; see Table 8
25
BURST LENGTH
4 empty Dwords
8 empty Dwords
16 empty Dwords
32 empty Dwords
VIDEO
DESCRIPTION
READ MODE
1 empty Dword
4 empty Dwords
8 empty Dwords
16 empty Dwords
Product specification
(1)
SAA7146A
AUDIO