參數(shù)資料
型號(hào): GC4116
廠商: Electronic Theatre Controls, Inc.
英文描述: MULTI-STANDARD QUAD DUC CHIP
中文描述: 多標(biāo)準(zhǔn)四數(shù)字上芯片
文件頁(yè)數(shù): 43/57頁(yè)
文件大?。?/td> 401K
代理商: GC4116
GC4116 MULTI-STANDARD QUAD DUC CHIP
DATA SHEET REV 1.0
19992001
GRAYCHIP,INC.
- 38 -
APRIL 27, 2001
This document contains preliminary information which may be changed at any time without notice
5.8
RESAMPLER CONTROL PAGE (PAGE 8)
This page controls the resampler. The address assignments are:
ADDRESS 16:
N-Channels Out Register
, Suggested default = 0x23
ADDRESS 17:
N-Multiplies Register
, Suggested default = 0x0E
Table 8: Resampler Control Registers
ADDRESS
NAME
DESCRIPTION
16
N-channels
Sets the number of resampler channels and filters
17
N-Multiplies
Sets the number of multiplies per output
18
Filter Select
Maps filters to resampler channels
19
Final Shift
Sets the final gain shift
20
Serial Map
Maps serial inputs to resampler channels
21
Ratio Sync
Synchronizes the ratio selection changes.
22
unused
23
Ratio Map
Maps ratios to resampler channels
24-31
Unused
BIT
TYPE
NAME
DESCRIPTION
0-1 LSB
R/W
NC
Must be set to NC=NCHAN-1, where NCHAN is the number of resampler
channels to be generated. A value of NC=0 means one resampler channel. A
value of NC=1 means two resampler channels. Use a value of NC=3 for either
three or four resampler channels. A value of 2 is illegal and will produce
erroneous results.
2-3
R/W
NF
Must be set to NF=NFILTER-1, where NFILTER is the number of resampler
filters. Used to partition the resampler coefficient RAM. A value of NF=0 means
one filter (normal case). A value of NF=1 means two filters. A value of NF=3
means four filters. A value of 2 is illegal.
4-6
R/W
RES_SYNC
The resampler is synchronized to this sync source. This sync clears the delay
accumulators in all channels at the same time. The sync modes are: 0,1 and 5
are “never”, 2=SIA, 3=SIB, 4=OS, and 6,7 are “always”.
7 MSB
R/W
Unused
BIT
TYPE
NAME
DESCRIPTION
0-5 LSB
R/W
NM
Must be set to NM=NMULT-1, where NMULT is the number of resampler
multiplies. The minimum legal value is NM=5, the maximum is NM=63 but
typically the maximum will be set by other constraints (see Section 3.7.4). In the
case of a single channel output the minimum value is NM=6.
6
R/W
NO_SYM_RES
The resampler filter is presumed to be symmetric unless this bit is set.
7 MSB
R/W
Unused
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