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STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
352
133H
BRFP
134H
BRCLK
143H
BTCLK
BTFP
BTSIG
BTPCM
1D6H
XCLK
1F0H
TRIMF
Writing the following address locations forces the outputs to the value in the
corresponding bit position:
Table 74
- Controlling Outputs in Test Mode 0
Addr
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
100H
RSYNC
118H
TFP
3
TDAT
3
11AH
TCLKO
3
133H
BRPCM
BRSIG
BRPCM
(OEB)
BRSIG
(OEB)
BRFP
BRFP
(OEB)
BRCLK
BRCLK
(OEB)
143H
INT
4
144H
BTCLK
(OEB)
BTCLK
BTFP
(OEB)
BTFP
Notes:
1. To observe the value of RCLKI or RDAT, the RUNI bit in the Receive Line
Interface Configuration register must be set to logic 1 and the RJATBYP bit in
the Receive Options register must be set to logic 0. Additionally, the value on
RDAT must be clocked in by RCLKI (one clock pulse) in order to be read.
2. To observe the value of TCLKI, the PLLREF1 and PLLREF0 bits in the
Transmit Timing Options register must both be set to logic 1.
3. To control the TFP, TDAT and TCLKO outputs, the TJATBYP bit in the
Transmit Options register must be set to logic 0 and the TUNI bit in the
Transmit Line Interface Configuration register must be set to logic 1.
Additionally, the value written to the TDAT and TFP bits do not propagate to
the TDAT and TFP outputs, respectively, until the TCLKO output is toggled
twice (i.e., by setting the TCLKO bit to logic 0, logic 1, logic 0, logic 1 and
back to logic 0).