參數(shù)資料
型號(hào)： SI3011-F-FS
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 76/128頁(yè)
文件大?。?/td> 0K
描述： IC VOICE DAA GCI/PCM/SPI 16SOIC
標(biāo)準(zhǔn)包裝： 48
系列： ISOcap™
電源電壓： 3 V ~ 3.6 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC N
包裝： 管件
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Si3050 + Si3011/18/19
Rev. 1.5
51
(SC) for communicating status of the device and for
initiating commands. Within the SC channel are six
Command/Indicate (C/I) bits and two handshaking bits
(MR and MX). The C/I bits are used for status and
command communication, whereas the handshaking
bits Monitor Receive (MR) and Monitor Transmit (MX)
are used for data exchanges in the Monitor channel.
Figure 43 illustrates the contents of a GCI highway
frame.
5.37. Companding in GCI Mode
The Si3050 supports -Law and A-Law companding
formats in addition to 8-bit or 16-bit linear data. The 8-bit
companding
schemes
are
described
in
in Table 22 and Table 23. If 16-bit linear mode is used,
the resulting 16-bit samples are transmitted in both the
B1 and B2 channels of a single subframe. For proper
operation, select all Si3050 DAAs to use the B1 channel
with only one DAA per subframe.
5.38. 16 kHz Sampling Operation in GCI
Mode
The Si3050 can be configured to support a 16 kHz
sampling rate (as described in "5.34. 16 kHz Sampling
data on an 8 kHz GCI Highway bus. If 8-bit samples are
used with a 16 kHz sample rate, the samples are
transmitted in both the B1 and B2 channels of a single
subframe. If 16-bit linear mode is used, the resulting
16-bit samples are transmitted in both the B1 and B2
channels of two consecutive subframes. In this case,
assign one DAA per two subframes.
5.39. Monitor Channel
The Monitor channel is used for initialization and setup
of the Si3050. It also can be used for general
communication with the Si3050 by allowing read and
write access to the Si3050’s registers. Use of the
monitor channel requires manipulation of the MR and
MX handshaking bits, located in bits 1 and 0 of the SC
channel
described
below.
For
purposes
of
this
specification, “downstream” is identified to be the data
sent by a host to the Si3050. “Upstream” is identified to
be the data sent by the Si3050 to a host.
Figure 43 illustrates the Monitor channel communication
protocol.
For
successful
communication
with
the
Si3050, the transmitter should anticipate the falling
edge of the receiver’s acknowledgement. This also
maximizes communication speed. Because of the
handshaking
protocol
required
for
successful
communication, the data transfer rate using the Monitor
channel is less than 8 kbytes/second.
Figure 43. Time-Multiplexed GCI Highway Frame Structure
FSYNC
125
s
Channel
01
2
6
1
SC Channel
Sub-Frame
SF1
SF2
SF3
SF4
SF5
SF6
SF7
SF0
MR MX
C/I
M
B2
B1
88
8
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