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AM79C974 Datasheet(PDF) 88 Page - Advanced Micro Devices |
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AM79C974 Datasheet(HTML) 88 Page - Advanced Micro Devices |
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88 / 153 page  AMD P R E L I M I N A R Y 88 Am79C974 NAND Tree Testing The Am79C974 controller provides a NAND tree test mode to allow checking connectivity to the device on a printed circuit board. The NAND tree is built on all PCI bus signals (see Figure 27 and Table 8). The NAND tree testing is enabled by asserting RST. All PCI bus signals will become inputs when RST is as- serted. The result of the NAND tree test can be ob- served on the BUSY pin. 18681A-35 A B O S MUX RST (pin 120) INTA (pin 117) INTB (pin 118) CLK (pin 121) AD2 (pin 54) AD1 (pin 56) AD0 (pin 57) PWDN (pin 58) PCnet-SCSI Core BUSY (pin 62) +5 V BUSY Figure 27. Am79C974 NAND Tree Test Structure |
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