PM4354 Datasheet, PDF (130/463 Pages) PMC-Sierra, Inc – Four Channel Combined E1/T1/J1 Transceiver/Framer

RELEASED
DATASHEET
PMC-1990315
ISSUE 6
PM4354 COMET-QUAD
FOUR CHANNEL COMBINED E1/T1/J1
TRANSCEIVER / FRAMER
PLL Reference, as set by
register bits
PLLREF[1:0]
1.544 MHz
2.048 MHz
2.048 MHz
1.544 MHz
nominal 1.544 MHz (derived
from gapped 2.048 MHz)¹
8 kHz
16 kHz
8 kHz
16 kHz
PLL Output
Frequency
1.544 MHz (T1)
2.048 MHz (E1)
1.544 MHz (T1)
2.048 MHz (E1)
1.544 MHz (T1)
1.544 MHz (T1)
1.544 MHz (T1)
2.048 MHz (E1)
2.048 MHz (E1)
N1[7:0] N2[7:0]
2FH
FFH
FFH
C0H
C0H
00H
01H
00H
01H
2FH
FFH
C0H
FFH
C0H
C0H
C0H
FFH
FFH
1 _{Nominal 1.544 MHz is derived from a gapped 2.048 MHz when (a) the THMVIPEN bit of register}
0B9H is logic 1 and the divided CMV8MCLK is configured as the reference or when (b) the device
is in T1 mode, the BTIF’s RATE[1:0] bits are set to “01”, and BTCLK[x] is configured as the
reference.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC. AND FOR ITS CUSTOMERS’ INTERNAL USE
115