Mips Technologies Malta - AMR (Audio Modem Riser); Front Panel Connector; Debug Access; 1: Software Debug

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Hardware Description

40 MIPS® Malta™ User’s Manual, Revision 01.07

5.15 AMR (Audio Modem Riser)

Connector J16 is an AMR connector [14] that allows an audio/modem interface card to be plugged into the mother-

board. This is controlled via U23, a PCI Audio controller [7]. The AMR connector is a dual AC’97 audio codec inter-

face.

5.16 Front Panel Connector

The Front Panel connector (J9), shown in Figure 5.3, contains all signals to/from the front panel of a normal PC-chas-

sis. An additional connector (J30) is available for a three-pin Power LED connector.

Figure 5.3 Front Panel Connector

5.17 Debug Access

5.17.1 Software Debug

The EJTAG connector (J17) allows connection of a suitable EJTAG debugger probe directly to the CPU. This allows

access to the internal hardware debug functionality of the CPU core. See [4] for details.

5.17.2 Hardware Debug

You have access to most, if not all, interesting signals on the Malta Board via testpoints (Table 5.5) and HP Logic

Analyser high-density connectors (Table 5.6). Refer to the tables below and the schematics for details of these.

Table 5.5 Testpoints

Ref Silkscreen Color Function

TP1 D3V3SB Red Digital 3.3V Stand-by

TP2 D5VSB Red Digital 5V Stand-by rail

TP3 D3V3 Red Digital 3.3V rail

Power LED

On/NMI Button

Reserved

HD LED

Reset Button

Reserved

+5V

Power LED

J30