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UPD703106AA Datasheet(PDF) 33 Page - NEC |
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UPD703106AA Datasheet(HTML) 33 Page - NEC |
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33 / 99 page  CHAPTER 3 SPECIFICATIONS OF PCI HOST BRIDGE MACRO Application Note U17121EJ1V1AN 33 3.3 Pin Functions The pin functions of each interface are described below. 3.3.1 External bus slave interface pins Pin Name I/O Function Active I_SRST_B Input System reset input Low I_CPU_CS0_B Input PCI host bridge register chip select input Low I_CPU_CS1_B Input PCI I/O area chip select input Low I_CPU_CS2_B Input PCI memory area chip select input Low I_CPU_ADR0 to I_CPU_ADR19 Input CPU address input − I_CPU_DATA0 to I_CPU_DATA31 Input CPU data input − O_CPU_DATA0 to O_CPU_DATA31 Output CPU data output − EN_CPU_DATA Output CPU data output enable output High I_CPU_BE_B0 to I_CPU_BE_B3 Input CPU data byte enable input − I_CPU_WE_B Input CPU write data enable input Low I_CPU_OE_B Input CPU read data output enable input Low O_CPU_WAIT_B Output CPU data wait output Low O_PCIHOST_INT Output PCI host bridge interrupt output Low I_MODE16 Input CPU data bus width select input Low: 32-bit width High: 16-bit width 3.3.2 SDRAM bus interface pins Pin Name I/O Function Active O_HOLDREQ_B Output SDRAM bus hold request output Low I_HOLDACK_B Input SDRAM bus hold acknowledge input Low I_SDCLK Input SDRAM clock input − O_SD_DATA0 to O_SD_DATA31 Output SDRAM data output − I_SD_DATA0 to I_SD_DATA31 Input SDRAM data input − EN_SD_DATA0, EN_SD_DATA1 Output SDRAM data enable output Low: Lower 16 bits (O_SD_DATA0 to O_SD_DATA15) High: Higher 16 bits (O_SD_DATA16 to O_SD_DATA31) ← O_SD_DQM_B0 to O_SD_DQM_B3 Output SDRAM data mask output Low O_SD_ADR1 to O_SD_ADR25 Output SDRAM address output − O_SD_CKE Output SDRAM clock enable output High O_SD_CS_B Output SDRAM chip select output Low O_SD_RAS_B Output SDRAM row address strobe output Low O_SD_CAS_B Output SDRAM column address strobe output Low O_SD_WR_B Output SDRAM read/write output Low EN_SD_CTL Output SDRAM control signal output enable output (Output buffer enable of O_SD_ADR1 to O_SD_ADR25, O_SD_CKE, O_SD_CS_B, O_SD_RAS_B, O_SD_CAS_B, and O_SD_WR_B pins) High |
Número de pieza similar - UPD703106AA |
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Descripción similar - UPD703106AA |
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