Debug Port Design Guide for UP/DP Systems

DPDG for UP/DP Systems Order Number: 313373-001 3
Contents
1 How to Use this Document.............................................................................................7
2 Overview.....................................................................................................................9
2.1 General Guidelines ..............................................................................................9
2.1.1 Termination Resistors ............................................................................. 10
3 XDP Design Guide.......................................................................................................13
3.1 Conventions ..................................................................................................... 13
3.2 XDP Routing Overview .......................................................................................13
3.3 JTAG Routing Guidelines.....................................................................................16
3.3.1 TDI - TDO Routing Guidelines .................................................................16
3.3.2 TCK0 Routing ........................................................................................18
3.3.3 TMS Routing Guidelines...........................................................................18
3.3.4 TRSTn Routing Guidelines........................................................................18
3.4 Run Control Routing Guidelines ........................................................................... 19
3.5 System Control Routing Guidelines ......................................................................19
3.5.1 PWRGOOD (HOOK0) Routing Guidelines .................................................... 19
3.5.2 Reserved (HOOK[1])...............................................................................19
3.5.3 Reserved (HOOK[2])...............................................................................19
3.5.4 Reserved (HOOK[3])...............................................................................19
3.5.5 ITPCLK/ITPCLK# (HOOK[4:5]) Routing Guidelines ...................................... 19
3.5.6 RESET_IN# (HOOK6) Routing Guidelines...................................................20
3.5.7 RESET_OUT# (HOOK7) Routing Guidelines ................................................ 20
3.5.8 XDP_Present..........................................................................................20
3.6 I2C* Routing Guidelines..................................................................................... 20
3.7 Observation Port Routing Guidelines .................................................................... 21
3.7.1 Observation Port Configurations ............................................................... 21
3.7.2 Observation Port Routing.........................................................................21
3.7.3 OBSFN_x[1:0] .......................................................................................21
3.7.4 OBSDATA_A[3:0]................................................................................... 22
3.7.4.1 Routing Guidelines.................................................................... 22
3.7.5 OBSDATA_B[3:0]................................................................................... 22
3.7.5.1 Routing Guidelines.................................................................... 22
3.8 Power..............................................................................................................22
3.8.1 VCC_OBS Pins .......................................................................................22
3.8.2 Ground .................................................................................................22
3.9 System Connection............................................................................................22
3.10 Depopulating XDP for Production Units.................................................................24
3.11 Mechanical Specifications ................................................................................... 24
4 XDP-SSA Design Guide................................................................................................27
4.1 Conventions .....................................................................................................27
4.2 XDP-SSA Routing Overview ................................................................................27
4.3 JTAG Routing Guidelines.....................................................................................27
4.3.1 TDI - TDO Routing Guidelines ..................................................................27
4.3.2 TCK0 Routing ........................................................................................27
4.3.2.1 TMS Routing Guidelines .............................................................27
4.3.3 TRSTn Routing Guidelines........................................................................28
4.4 Run Control Routing Guidelines ........................................................................... 28
4.5 System Control Routing Guidelines ......................................................................28
4.5.1 PWRGOOD (HOOK0) Routing Guidelines .................................................... 28
4.5.2 Reserved (HOOK[1:3])............................................................................28
4.5.3 ITPCLK/ITPCLK# (HOOK[4:5]) Routing Guidelines ...................................... 28
4.5.4 RESET_IN# (HOOK6) Routing Guidelines...................................................28