AD9545 datasheet(4/157 Pages) AD

4 / 157 page

AD9545

Data Sheet

Rev. A | Page 4 of 157

User Access to Time Stamps Overview ................................. 112

Reading User Time Stamps ..................................................... 112

Interpreting User Time Stamps .............................................. 113

Tagged User Time Stamps ....................................................... 114

User Time Stamp System Clock Compensation................... 114

Timing Skew Measurements Using Two TDCs........................ 115

Tagged Skew Measurement Time Stamps ............................. 116

Auxiliary TDCs............................................................................. 117

Ping Pong TDC......................................................................... 117

Auxiliary NCOs ............................................................................ 119

Auxiliary NCO Overview........................................................ 119

Auxiliary NCO Frequency ...................................................... 119

Auxiliary NCO Phase Offset................................................... 120

Auxiliary NCO Phase Slew Limit........................................... 120

Manual Cycle Adjustment....................................................... 121

Auxiliary NCO Time Stamps.................................................. 121

Auxiliary NCO Pulse Output.................................................. 121

Temperature Sensor...................................................................... 123

Temperature Sensor Overview ............................................... 123

Temperature Source Selection ................................................ 123

Internal Temperature Sensor .................................................. 123

External Temperature Source ................................................. 124

System Clock Compensation ...................................................... 125

System Clock Compensation Overview................................ 125

Compensation Method 1......................................................... 127

Compensation Method 2......................................................... 130

Compensation Method 3......................................................... 130

Integrated Compensation Subsystem .................................... 132

System Clock Compensation Programming Registers........ 133

Status and Control Pins ............................................................... 134

Status and Control Pins Overview ......................................... 134

Multifunction Pins at Reset/Power-Up ................................. 134

Status Functionality.................................................................. 135

Control Functionality .............................................................. 135

Interrupt Request (IRQ) .............................................................. 137

IRQ Overview........................................................................... 137

IRQ Monitor ............................................................................. 137

IRQ Mask................................................................................... 137

IRQ Clear................................................................................... 137

Watchdog Timer ........................................................................... 139

EEPROM Usage............................................................................ 140

EEPROM Overview ................................................................. 140

EEPROM Controller General Operation.............................. 140

EEPROM Instruction Set ........................................................ 141

Multidevice Support ................................................................ 143

Applications Information ............................................................ 145

Optical Networking Line Card............................................... 145

Small Cell Base Station ............................................................ 146

IEEE 1588 Servo ....................................................................... 147

Initialization Sequence................................................................. 148

Serial Control Port ....................................................................... 151

Serial Control Port Overview ................................................. 151

SPI/I²C Port Selection.............................................................. 151

SPI Serial Port Operation........................................................ 151

I²C Serial Port Operation ........................................................ 154

Outline Dimensions ..................................................................... 157

Ordering Guide ........................................................................ 157

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