si3215-x-gm Silicon Laboratories, si3215-x-gm Datasheet - Page 47

• Manufacturer Part Number: si3215-x-gm
• Description: Proslic Programmable Cmos Slic/codec With Ringing/battery Voltage Generation
• Manufacturer: Silicon Laboratories

2.12. Companding
The ProSLIC supports both µ-255 Law and A-Law companding formats in addition to linear data. These 8-bit
companding schemes follow a segmented curve formatted as a sign bit, three chord bits, and four step bits. µ-255
Law is more commonly used in North America and Japan, while A-Law is primarily used in Europe. Data format is
selected via the PCMF register. Tables 31 and 32 define the µ-Law and A-Law encoding formats.
PCLK_CNT
PCLK_CNT
FSYNC
PCLK
FSYNC
Figure 29. Example, IDL2 Long FSYNC, B2, 10-Bit Mode (TXS/RXS = 10)
DRX
DTX
PCLK
DRX
DTX
HI-Z
HI-Z
0
Figure 30. GCI Example, Timeslot 1 (TXS/RXS = 0)
0
MSB
1
1
2
2
3
3
4
4
5
5
6
Rev. 0.92
6
7
7
8
LSB
8
9
10
9
10
11
MSB
MSB
11
12
12
13
HI-Z
14
13
15
14
16
15
17
16
18
17
LSB
LSB
18
HI-Z
Si3215
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