DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
RAF: RECEIVE ALIGN FRAME REGISTER (Address = 2F Hex)
(MSB)
(LSB)
Si
0
0
1
1
0
1
Sa7
1
1
SYMBOL POSITION
NAME AND DESCRIPTION
Si
0
0
1
1
0
1
1
RAF.7
RAF.6
RAF.5
RAF.4
RAF.3
RAF.2
RAF.1
RAF.0
International Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
RNAF: RECEIVE NON-ALIGN FRAME REGISTER (Address = 1F Hex)
(MSB)
(LSB)
Si
1
A
Sa4
Sa5
Sa6
Sa8
SYMBOL POSITION
NAME AND DESCRIPTION
Si
1
RNAF.7
RNAF.6
RNAF.5
RNAF.4
RNAF.3
RNAF.2
RNAF.1
RNAF.0
International Bit.
Frame Non-Alignment Signal Bit.
Remote Alarm.
A
Sa4
Sa5
Sa6
Sa7
Sa8
Additional Bit 4.
Additional Bit 5.
Additional Bit 6.
Additional Bit 7.
Additional Bit 8.
TAF: TRANSMIT ALIGN FRAME REGISTER (Address = 20 Hex)
(MSB)
(LSB)
Si
0
0
1
1
0
1
SYMBOL POSITION
NAME AND DESCRIPTION
Si
0
0
1
1
0
1
1
TAF.7
TAF.6
TAF.5
TAF.4
TAF.3
TAF.2
TAF.1
TAF.0
International Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Frame Alignment Signal Bit.
Note: The TAF register must be programmed with the 7-bit FAS word. The DS21354/DS21554 do
not automatically set these bits.
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