PM7346 datasheet(116/419 Pages) PMC

116 / 419 page

PM7346 S/UNI-QJET

DATASHEET

PMC-960835

ISSUE 6

SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 95

When a logic 0 is written to TUNI, the S/UNI-QJET transmits B3ZS-encoded

DS3 data, HDB3-encoded E3 data, or B8ZS-encoded J2 data on TPOS and

TNEG. The TUNI bit has no effect if TFRM[1:0] is set to 11 binary as the

output data is automatically configured for unipolar format.

TICLK:

The TICLK bit selects the transmit clock used to update the TPOS/TDATO

and TNEG/TOHM outputs. When a logic 0 is written to TICLK, the buffered

version of the input transmit clock, TCLK, is used to update TPOS/TDATO and

TNEG/TOHM on the edge selected by the TCLKINV bit. When a logic 1 is

written to TICLK, TPOS/TDATO and TNEG/TOHM are updated on the rising

edge of TICLK, eliminating the flow-through TCLK signal. The TICLK bit has

no effect if the LOOPT, LLOOP, or PLOOP bit is a logic 1.

TXREF:

The TXREF register bit determines if TICLK[1] and TIOHM/TFPI/TMFPI[1]

should be used as the reference transmit clock and overhead/frame pulse,

respectively, instead of TICLK[X] and TIOHM/TFPI/TMFPI[X]. If TXREF is set

to a logic 1, then TICLK[1] and TIOHM/TFPI/TMFPI[1] will be used as the

reference transmit clock and overhead/frame pulse, respectively. If TXREF is

set to a logic 0, then TICLK[X] and TIOHM/TFPI/TMFPI[X] will be used as the

reference transmit clock and overhead/frame pulse, respectively, for quadrant

X. If loop-timing is enabled (LOOPT = 1), the TXREF bit has no effect on the

corresponding quadrant. Note that when TXREF is set to logic 1, the unused

TICLK[x] and TIOHM/TFPI/TMFPI[x] should be tied to power or ground, not

left floating.

TFRM[1:0]:

The TFRM[1:0] bits determine the frame structure of the transmitted signal

according to the following table:

Table 4

- TFRM[1:0] Transmit Frame Structure Configurations

TFRM[1:0]

Transmit Frame Structure

DS3 (C-bit parity or M23 depending on the setting of the CBIT

bit in the DS3 TRAN Configuration register)

E3 (G.751 or G.832 depending on the setting of the

FORMAT[1:0] bits in the E3 TRAN Framing Options register)

J2 (G.704 and NTT compliant framing format)

PM7346 Datasheet(PDF) 116 Page - PMC-Sierra, Inc

PM7346 Datasheet(HTML) 116 Page - PMC-Sierra, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL