SI3018-F-GSR Silicon Laboratories Inc, SI3018-F-GSR Datasheet - Page 41
![](/photos/31/27/312732/16pin_soic_n_sml.jpg)
SI3018-F-GSR
Manufacturer Part Number
SI3018-F-GSR
Description
Manufacturer
Silicon Laboratories Inc
Datasheet
1.SI3018-F-GSR.pdf
(111 pages)
Specifications of SI3018-F-GSR
Lead Free Status / Rohs Status
Supplier Unconfirmed
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Si3050 + Si3018/19
5.33. Companding in PCM Mode
The
companding formats in addition to 16-bit linear data.
The 8-bit companding schemes follow a segmented
curve formatted as a sign bit, three chord bits, and four
step bits. µ-Law is commonly used in North America
and Japan, while A-Law is primarily used in Europe.
Data format is selected via the PCMF bits (Register 33).
Table 21 on page 43 and Table 22 on page 44 define
the µ-Law and A-Law encoding formats. If linear mode
is used the resulting 16-bit data is transmitted in two
consecutive 8-bit PCM highway timeslots as shown in
Figure 32.
42
PCLK_CNT
FSYNC
PCLK
DRX
Si3050
DTX
Figure 32. PCM Highway Transmission, Single Clock Cycle, 16-bit linear mode
Figure 33. PCM Highway Transmission, Single Clock Cycle, 16-bit linear mode
PCLK_CNT
HI-Z
0
FSYNC
supports
PCLK
MSB
MSB
DRX
1
DTX
2
3
HI-Z
(TXS = RXS = 0, PHCF = 0, TRI = 1, PCMF = 11, HSSM = 1)
4
5
both
0
(TXS = RXS = 0, PHCF = 0, TRI = 1, PCMF = 11)
6
Sample 1
MSB
MSB
7
1
µ-Law
8
2
9
10
3
11
and
12
4
13
5
14
A-Law
15
6
Rev. 1.31
16
17
7
5.34. 16 kHz Sampling Operation in PCM
The Si3050 can be configured to support a 16 kHz
sampling rate and transmit the data on an 8 kHz PCM or
GCI
(Register 7, bit 3) to 1, the DAA changes its sampling
rate, Fs, to 16 kHz if it was originally configured for an
8 kHz sampling rate. If µ-law or A-law companding is
used, the resulting 8-bit samples are transmitted in two
consecutive 8-bit PCM highway timeslots. If linear mode
is used, the resulting 16-bit samples are transmitted in
four consecutive 8-bit PCM highway timeslots as shown
in Figure 33.
18
8
19 20
Mode
9
highway
21
10
22
Sample 2
23
11
24
12
bus.
25
HI-Z
26
13
27
By
28
14
29
15
setting
30
LSB
LSB
31
16
LSB
LSB
32
33
17
the
34
HI-Z
18
35
HSSM
36 37
bit
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