MT9075B Datasheet, PDF (49/102 Pages) Mitel Networks Corporation – E1 Single Chip Transceiver

MT9075B
Data Sheet
Bit
Name
Functional Description
7-4
---
Unused. Set low for normal operation.
(0000)
3
CTXP
Custom Transmit Pulse Level. A zero means that the transmit pulse level is
(0)
determined by the bits TX2-0 listed in the table entry below. When CPL is a one,
the pulse level is determined by coefficients programmed in registers 1CH - 1Fh
on Page 2.
2-0
TX2-0
Transmit pulse amplitude. Select the TX2-TX0 bits according to the line type,
(0)
value of termination resistors (R_T), and transformer turns ratio used
TX2 TX1 TX0 Line(Ω) R_T(Ω) Xfmr
0 0 0 120 0
1:2
0 0 1 120 0
1:1
0* 1 0 120 15 1:2
0 1 1 120/75 12.1 1:2
1 0 0 75 0
1:2
1 0 1 75 0
1:1
1* 1 0 75 9.1 1:2
1 1 1 75/120 12.1 1:2
*These configurations provide the best matching characteristics.
Table 26 - Transmit Pulse Control Word
(Page 01H, Address 1FH)
49
Zarlink Semiconductor Inc.