User manual

Page 2
Document No. 80-15151 Issue 6 HEBER LTD
4 CIRCUIT SCHEMATIC DESCRIPTION
This section is a walk through of the Pluto 5 Controller board (56-14084) circuit schematics, Figures
1-13 of this document. A detailed description is given in Section 5 “CIRCUIT OPERATION”.
4.1 Sheet 1
This sheet shows the interconnection between the remaining sheets of this drawing.
4.2 Sheet 2
This sheet shows the following items:
• Motorola MC68340 Processor.
• Pull-up resistors on Address Bus, Data Bus and other Control Signals.
• Push Button Switch, SW3.
• P16 “BACKGROUND DEBUG MODE” connector.
4.3 Sheet 3
This sheet shows the FPGA.
4.4 Sheet 4
This sheet shows the following memory related circuits:
• Sockets for 1 or 2 EPROMs, U1 and U2
• 64Kbytes Battery backed RAM, U3 and U4
• P15 “MEMORY EXPANSION” connector for plug-in Memory Cards
4.5 Sheet 5
This sheet shows the following sound related circuits:
• Standard Sound Channel #1, U8 (OKI MSM6585).
• Optional Sound Channel #2, U39 (OKI MSM6585).
• TDA7057AQ Stereo Audio Amplifier.
• P10, “LS” connector for loudspeakers.
4.6 Sheet 6
This sheet shows the 64 Open Drain Outputs, OP0-63.
4.7 Sheet 7
This sheet shows the following circuits:
• External inputs, IP0-31
• Two 8 way DIL switches, SW1 and SW2