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參數(shù)資料
| 型號： | SI3225PPTX-EVB |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 97/112頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL W/DISCRETE INTERFACE |
| 設(shè)計資源： | Si3225PPTX-EVB Schematics/Layout |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ProSLIC® |
| 主要目的： | 接口，模擬前端（AFE） |
| 已用 IC / 零件： | Si3225 |
| 已供物品： | 板，CD |
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Si3220/25 Si3200/02
Rev. 1.3
85
Not
Recommended
fo
r N
ew
D
esi
gn
s
handshaking bits, MR and MX. The C/I bits indicate
status
and
command
communication
while
the
handshaking bits Monitor Receive, MR, and Monitor
Transmit, MX, exchange data in the Monitor channel.
Figure 55 illustrates the contents of a GCI highway
frame.
3.31.1. 16-Bit GCI Mode
In addition to the standard 8-bit GCI mode, the Dual
ProSLIC devices also offer a 16-bit GCI mode for
passing 16-bit voice data to the upstream host
processor. This mode can be used for testing purposes
or for passing non-companded voice data to an
upstream DSP for further processing.
In 16-bit GCI mode, both of the 8-bit voice data
channels (B1 and B2 in Figure 56) of each subframe are
required to pass the 16-bit voice data to the host. Each
125 s frame can, therefore, accommodate up to eight
voice channels (the Dual ProSLIC can accommodate up
to sixteen voice channels in 8-bit GCI mode). Table 48
describes the GCI mode subframe selection for 16-bit
GCI mode.
3.31.2. Monitor Channel
The Monitor channel is used for initialization and setup
of the Dual ProSLIC devices. It is also used for general
communication with the Dual ProSLIC by allowing read
and write access to the Dual ProSLIC devices registers.
Use of the monitor channel requires manipulation of the
Figure 55. Time-Multiplexed GCI Highway Frame Structure
Table 48. Subframe Selection 16-Bit GCI Mode
SDI
SDO
GCI Subframe 0 Selected
(Voice channels 0–1)
11
GCI Subframe 1 Selected
(Voice channels 2–3)
10
GCI Subframe 2 Selected
(Voice channels 4–5)
01
GCI Subframe 3 Selected
(Voice channels 6–7)
00
SF0
SF1
SF7
SF6
SF5
SF4
SF3
SF2
SC
B1
B2
M
01
2
3
11
Channel
Sub-Frame
8
88
FS
C/I
MR MX
125
s = 1 Frame
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