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PC87782 Datasheet(PDF) 11 Page - National Semiconductor (TI) |
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PC87782 Datasheet(HTML) 11 Page - National Semiconductor (TI) |
11 / 17 page 11 www.national.com VREF Analog Input 1 Reference Voltage for the on-chip A/D and D/A circuits. An External Reference voltage should be connected to this input. WAIT TTL N/A 1 WAIT signal for inserting Wait states into accesses to slow off-chip memories or peripherals. Table 3 Input Pins Signal Type Pin Number No. of Sig Pins Function 100-pin 160-pin Table 4 Output Pins Signal Type Pin Number No. of Sig Pins Function 100-pin 160-pin 32KX2 OSCOUT 1 32.768 KHz Crystal Oscillator Interface output to crystal CLK CM 1 Processor System Clock DAOUT Analog out 1 Digital to Analog Converter Output. IRQA, IRQB CM 2 Interrupts from Host Interface channels A and B. NTEST CM 1 NAND Test Output. TXD0-3 MII Out 4 MII Output data. TX_EN MII Out 1 MII Transmit Enable A0-15 CM N/A 16 Address A0 through A15. CR16A address to memory. BST(2,1,0) CM N/A 3 Bus Status bits 0 through 2 PFS CM N/A 1 Pipe Flow Status. PLI CM N/A 1 Pipe Long Instruction Status. RD CM N/A 1 Output Enable. SEL0 CM N/A 1 Zone Select 0. Chip-select signal for the External Memory. SEL1 CM N/A 1 Zone Select 1. Used to select the off-chip Base Memory. SELIO CM N/A 1 Chip-select signal for the I/O Expansion. WR(1,0) CM N/A 2 Write control for bytes 0 and 1 Table 5 Input/Output Pins Signal Type Pin Number No. of Sig Pins Function 100-pin 160-pin HD0-7 CMHD2-TTL 8 Bi-directional Data bus used to interface the PC87782 to the peripheral data bus of a host. PB0-7 CM-PU- Schmitt 8 Port B, bits 0 through 7. PC0-7 CM-PU- Schmitt 8 Port C, bits 0 through 7. PF0-7 CM-PU-TTL 8 Port F, bits 0 through 7 PI0-7 Analog I/O CM-PU- Schmitt 8 Analog inputs to the A/D converter. PI0 and PI1 can be analog feedback outputs from the Op-Amps. All Port I pins can be digital inputs or outputs. PL0-7 CM-PU- Schmitt 8 Port L, bits 0 through 7 |
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Similar Description - PC87782 |
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