
DS21352/DS21552
2 of 137
TABLE OF CONTENTS
1.
2.
3.
LIST OF FIGURES .........................................................................................................................5
LIST OF TABLES...........................................................................................................................6
INTRODUCTION............................................................................................................................7
3.1
3.2
PIN DESCRIPTION......................................................................................................................11
4.1
PIN FUNCTION DESCRIPTION..........................................................................................17
4.1.1 Transmit Side Pins........................................................................................................17
4.1.2 Receive Side Pins..........................................................................................................20
4.1.3 Parallel Control Port Pins............................................................................................23
4.1.4 JTAG Test Access Port Pins .........................................................................................25
4.1.5 Interleave Bus Operation Pins......................................................................................25
4.1.6 Line Interface Pins........................................................................................................26
4.1.7 Supply Pins....................................................................................................................27
PARALLEL PORT........................................................................................................................28
5.1
REGISTER MAP ...................................................................................................................28
CONTROL, ID, AND TEST REGISTERS.................................................................................32
6.1
POWER-UP SEQUENCE......................................................................................................32
6.2
DEVICE ID............................................................................................................................32
6.3
PAYLOAD LOOPBACK.......................................................................................................37
6.4
FRAMER LOOPBACK.........................................................................................................38
6.5
PULSE DENSITY ENFORCER............................................................................................40
6.6
REMOTE LOOPBACK.........................................................................................................44
STATUS AND INFORMATION REGISTERS..........................................................................45
ERROR COUNT REGISTERS....................................................................................................52
8.1
LINE CODE VIOLATION COUNT REGISTER (LCVCR)................................................53
8.2
PATH CODE VIOLATION COUNT REGISTER (PCVCR)...............................................54
8.3
MULTIFRAMES OUT OF SYNC COUNT REGISTER (MOSCR)....................................55
DSO MONITORING FUNCTION...............................................................................................56
FUNCTIONAL DESCRIPTION..............................................................................................8
DOCUMENT REVISION HISTORY....................................................................................10
4.
5.
6.
7.
8.
9.