DS2154 Dallas Semiconducotr, DS2154 Datasheet - Page 21

• Manufacturer Part Number: DS2154
• Description: Enhanced E1 Single Chip Transceiver
• Manufacturer: Dallas Semiconducotr

IDR: DEVICE IDENTIFICATION REGISTER (Address=0F Hex)
RCR1: RECEIVE CONTROL REGISTER 1 (Address=10 Hex)
(MSB)
(MSB)
RSMF
T1E1
SYMBOL
SYMBOL
RESYNC
SYNCE
RSMF
T1E1
RSIO
RSM
FRC
ID3
ID2
ID1
ID0
-
-
RSM
0
POSITION
POSITION
RCR1.7
RCR1.6
RCR1.5
RCR1.4
RCR1.3
RCR1.2
RCR1.1
RCR1.0
IDR.7
IDR.3
IDR.1
IDR.2
IDR.0
RSIO
0
NAME AND DESCRIPTION
T1 or E1 Chip Determination Bit.
0=T1 chip
1=E1 chip
Chip Revision Bit 3. MSB of a decimal code that represents the
chip revision.
Chip Revision Bit 2.
Chip Revision Bit 1.
Chip Revision Bit 0. LSB of a decimal code that represents the
chip revision.
NAME AND DESCRIPTION
RSYNC Multiframe Function. Only used if the RSYNC pin is
programmed in the multiframe mode (RCR1.6=1).
0=RSYNC outputs CAS multiframe boundaries
1=RSYNC outputs CRC4 multiframe boundaries
RSYNC Mode Select.
0=frame mode (see the timing in Section 13)
1=multiframe mode (see the timing in Section 13)
RSYNC I/O Select. (Note: this bit must be set to 0 when
RCR2.1=0).
0=RSYNC is an output (depends on RCR1.6)
1=RSYNC is an input (only valid if elastic store enabled)
Not Assigned. Should be set to 0 when written.
Not Assigned. Should be set to 0 when written.
Frame Resync Criteria.
0=resync if FAS received in error 3 consecutive times
1=resync if FAS or bit 2 of non-FAS is received in error 3
consecutive times
Sync Enable.
0=auto resync enabled
1=auto resync disabled
Resync. When toggled from low to high, a resync is initiated.
0
-
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ID3
-
FRC
ID2
SYNCE
ID1
RESYNC
(LSB)
(LSB)
ID0
DS2154