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Signal Descriptions
A-6
© Copyright ARM Limited 1999. All rights reserved.
ARM DUI 0125A
A.2.3 Through-board signal connections
The signals on the pins labeled E[31:0] are cross-connected between the plug and socket
so that the signals are rotated through the stack in groups of four. For example, the first
block of four are connected as shown in Table A-2.
For details about the signal rotation scheme, see System bus signal routing on
page 3-15.
The signals on the pins labeled F[31:0] are connected so that pins on the socket are
connected to the corresponding pins on the plug.
The signals on G[15:8] and G[5:0] are connected so that pins on the socket are
connected to the corresponding pins on the plug.
Pins G[7:6] carry the JTAG TDI and TDO signals. The signal TDO is routed through
devices on each baord as it passes up through the stack (see JTAG signals on page 3-24).
Table A-2 Signal cross-connections (example)
Plug Socket
E0 connects to E1
E1 connects to E2
E2 connects to E3
E3 connects to E0