bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 179
bt8375kpf
Manufacturer Part Number
bt8375kpf
Description
Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
Manufacturer
Conexant Systems, Inc.
Datasheet
1.BT8375KPF.pdf
(323 pages)
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Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
3.10 Receive Sa-Byte Buffers
Unused bits indicated by a dash (—) are reserved and should be written to 0. Writing to reserved bits has no
effect.
Sa-bits received in TS0 of odd frames at each receive multiframe interrupt [RMF; addr 008]. Bit 0 of all RSA
registers contains data from frame 1, bit 1 contains data from frame 3, bit 2 contains data from frame 5, and so
on. This gives the processor a full 2 ms after RMF-interrupt to read any Sa-Byte buffer before the contents
change. The processor ignores RSA buffer contents during T1 mode, and when the receiver reports a loss of
FAS alignment [FRED=1; addr 049] in E1 mode.
RSA4[7]
RSA4[6]
RSA4[5]
RSA4[4]
RSA4[3]
RSA4[2]
RSA4[1]
RSA4[0]
RSA5[7]
RSA5[6]
RSA5[5]
RSA5[4]
RSA5[3]
RSA5[2]
RSA5[1]
RSA5[0]
N8370DSE
05B— Receive Sa4 Byte Buffer (RSA4)
05C— Receive Sa5 Byte Buffer (RSA5)
Five receive Sa-Byte buffers [RSA4–RSA8] are double-buffered. All five registers are updated with the
RSA4[7]
RSA5[7]
7
7
Sa4 bit received in frame 15
Sa4 bit received in frame 13
Sa4 bit received in frame 11
Sa4 bit received in frame 9
Sa4 bit received in frame 7
Sa4 bit received in frame 5
Sa4 bit received in frame 3
Sa4 bit received in frame 1
Sa5 bit received in frame 15
Sa5 bit received in frame 13
Sa5 bit received in frame 11
Sa5 bit received in frame 9
Sa5 bit received in frame 7
Sa5 bit received in frame 5
Sa5 bit received in frame 3
Sa5 bit received in frame 1
RSA4[6]
RSA5[6]
6
6
RSA4[5]
RSA5[5]
5
5
RSA4[4]
RSA5[4]
4
4
Conexant
RSA4[3]
RSA5[3]
3
3
RSA4[2]
RSA5[2]
2
2
3.10 Receive Sa-Byte Buffers
RSA4[1]
RSA5[1]
1
1
RSA4[0]
RSA5[0]
0
0
3-61
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