Datasheet

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
110 of 124
Figure 18-15. DS21354/DS21554 Transmit Data Flow
Si Bit Insertion
Control
(TCR1. 3)
Timesl ot 0
Pass-Through
(TCR1.6)
E-Bi t Generation
(TCR2.1)
Sa Bit Insertion
Control (TCR2.3
thru TCR2.7)
Idle Code / Channel
Insertion Control via
TIR1/2/3/4
Transmit Unframed All
Ones (TCR1.4) or
Auto AIS (CCR2.5)
Code Word
Generati on
CRC4 Enable
(CCR.4)
TAF
TNAF.5-7
TLINK
TS1 to TS16
TI DR
To Waveshaping
and Line DriversTPOS,
0
1
01
10
01
1
0
01
01
10
AI S
Generati on
Transmit Signal ing
All Ones
(TCR1.2)
= Register
= Device Pin
= Selector
KEY:
TCBR1/2/3/4
RSER
(note #1)
CCR3. 6
TCR1.5
Signali ng Bit
Insertion Control
TIR Function Select
(CCR3.5)
AI S
Generati on
01
NOTES :
1. TCLK should be tied to RCLK and TSYNC should be tied to RFSYNC for
data to be properly sourced from RSER.
2. Auto Remote Alarm i f enabl ed will only overwrite bit 3 of timeslot 0 in the
Not Align Frames if the alarm needs to be sent.
Sa Bit Insertion
Control Register
(TSaCR)
10
TSa4 to TSa8
TRA
TSi NAF
TSi AF
CRC4 Mul t i fr ame
Alignment Word
Generation (CCR.4)
Receive Side
CRC4 Err or
Det ec tor
01
Auto Remote Alarm
Generati on (CCR2.4)
Per-Channel Code
Gener at i on
(TCC1/2/3/4)
01
TC1 to TC32
HDLC
ENGINE
DS0 Dat a
Source MUX
(TDC1/2)
01
TSER
&
TDATA
TAF/TNAF Bit
MUX
0
1
TNAF.0-4
Sa Dat a Source
MUX
(TDC1)
0
1
AMI or HDB3
Con ver t er
CCR1. 6