Fujitsu MPD3173AT Product Manual - Page 38
Power supply connector CN1, Power supply connector pins CN1, System configuration
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3.3.4 Power supply connector (CN1) Figure 3.9 shows the pin assignment of the power supply connector (CN1). 1 2 3 4 (Viewed from cable side) 1 +12VDC 2 +12V RETURN 3 +5V RETURN 4 +5VDC Figure 3.9 Power supply connector pins (CN1) 3.3.5 System configuration for Ultra DMA Host system that support Ultra DMA transfer modes greater than mode 2 shall not share I/O ports. They shall provide separate drivers and separate receivers for each cable. a) The 80-conductor cable assemblies shall be used for systems operating at Ultra DMA modes greater than 2. The 80-coductor cable assemblies may be used in place of 40conductor cable assemblies to improve signal quality for data transfer modes that do not require an 80-conductor cable assembly. And the 80-conductor cable assembly shall meet the following specifications. 1) The assembly utilizes a fine pitch cable to double the number of conductors available to the 40-pin connector. The grounds assigned by the interface are commoned with the additional 40 conductors to provide a ground between each signal line and provide the effect of a common ground plane. 2) The cable assembly may contain up to 3 connectors which shall be uniquely colored as follows. All connectors shall have position 20 blocked. • The System Board Connector shall have a Blue base and Black retainer. Pin 34 (PDIAG-: CBLID-) shall be connected to ground and shall not be wired to the cable assembly. • Connector Device "0" shall have a Black base and Black retainer. • Connector Device "1" shall have a Gray base and Black retainer. Pin 28 (CSEL) shall not be connected to the cable (contact 28 may be removed to meet this requirement). • The cable assembly may be printed with connector identifiers. 3) Typical cable characteristics are shown as follows. • Cable: AWG 30 (pitch: 0.635 mm) • Single Ended impedance: typical 80 Ω • Cable capacitance: typical 57 pF/m 4) The dimensions are shown in Figure 3.10. C141-E069-02EN 3 - 9
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