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
302
only
1
E1 PLCP
40
C0
C0
--
C4
C4
--
--
--
--
--
--
--
--
04
00
04
00
E1 ADM
40
C0
C0
--
C0
C0
--
--
--
--
--
--
--
--
04
00
04
00
T1 PLCP
40
C0
C0
--
84
84
--
--
--
--
--
--
--
--
04
00
04
00
T1 ADM
40
C0
C0
--
80
80
--
--
--
--
--
--
--
--
04
00
04
00
External
Framer
ADM
2
40
C0
C0
--
01
01
--
--
--
--
--
--
--
--
04
00
4
04
00
1. In framer only modes, TGAPCLK[x] and RGAPCLK[x] are enabled by programming
register x01H to 0CH.
2. Byte, nibble, or bit alignment of the ATM Cell bytes to the line overhead is configured
using the TOCTA bit in register x00H, and the FORM[1:0] bits in register x0CH.
3. Unipolar mode is selected for DS3, E3, and J2 modes by setting the TUNI bit to logic
1 in register x02H and the UNI bit in x30H, x38H, and x44H respectively. When the
DS3, E3, or J2 framers are bypassed, unipolar mode is selected by default.
4. Bit, Nibble, and Byte alignment of the ATM cell octets to the arbitrary external frame
overhead is set using the ALIGN[1:0] bits of register x61H.
5. ATM cells are configured to have the Coset Polynomial added to the HCS byte and
payload scrambling/descrambling is enabled.
6. ATM Idle cell header octets H1, H2, H3, and H4 are configured to be 00H 00H 00H
01H respectively.
12.3 PLCP Frame Formats
The S/UNI-QJET provides support for four different PLCP frame formats: the
DS3 PLCP format, the DS1 frame format, the G.751 E3 frame format, and the E1
frame format. The structure of each of these formats is quite similar, and is
illustrated in Figure 12 through Figure 15.