STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
Figure 12
- Transmit Timing Options
Transmit line clock, TCLKO
(becomes BTCLK output
w hen CMODE=0)
TX
ELST
Optional
freq. division
and gapping
BTCLK
(input)
TXELSTBYP
0
1
OCLKSEL1
TJAT
FIFO
Internal 24x clock
FIFO input
data clock
0
1
0
FIFO output
data clock
LINELB
1
OCLKSEL0
1
0
"Jitter-free" line rate clock
(1.544MHz or 2.048MHz)
00
TJAT
PLL
01
PLLREF[1:0]
10
Receive recovered clock
11
TCLKI
PROPRIETARY AND CONFIDENTIAL
94