PM6341 E1XC
DATA SHEET
PMC-910419
ISSUE 8
E1 FRAMER/TRANSCEIVER
Figure 29
- Diagnostic Digital Loopback
BTSIG
BTPCM
BTCLK
BTFP
XPLS
DTIF
DJAT
TRAN
BRFPI
optional
AIS
BRCLK
BRPCM
ELST
RSLC
CDRC
FRMR
RPCM
RCLK
14.4.4 Diagnostic Metallic Loopback
When Diagnostic Metallic loopback (DMLB) is initiated by writing 08H to the
Master Diagnostics Register, the E1XC is configured to internally connect the RZ
dual-rail positive and negative data pulses from XPLS Performance Monitor,
representing the sliced versions of the analog output signals on the TAP and TAN
pins, to the dual-rail inputs of CDRC. The Performance Monitor inputs internal to
XPLS have a fixed slicing threshold and their monitoring position is located at the
driver outputs.
Conceptually, the data flow through E1XC in this loopback condition can be
shown as follows:
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PMC [ PMC-SIERRA, INC ]
