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34C60 Datasheet(PDF) 1 Page - SMSC Corporation |
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34C60 Datasheet(HTML) 1 Page - SMSC Corporation |
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1 / 58 page  SMSC DS – PPC34C60 Rev. 06/01/2001 ADVANCED INFORMATION Parallel Port Interface Chip - Peripheral Side FEATURES Creates PC/AT-Style Bus from Parallel Printer Port Signals Single Chip Interface to Any Bus Capable Peripheral Supports Standard, Bi-Directional, EPP, and ECP Parallel Ports Burst Mode for Improved Data Transfer Rates Adaptive Interface Optimizes Transfer Rates to Parallel Port Characteristics Digital Signal Filtering Increases Noise Immunity Allows Daisy-Chain of up to Eight Peripherals Including Standard Printer Provides Interrupt Sharing with Daisy-Chained Devices 16-Bit Product ID Support Peripheral Bus Clock Selectable at System Clock /2, /3, /5, or /6 Interfaces to 8-Bit and/or 16-Bit Peripherals FIFO Operation Permits Overlapping Parallel Port and Peripheral Bus Cycles for Maximum Data Transfer Rate Flexible DRAM Buffer Support and DMA Capability Four Output Lines Individually Configurable as Chip Selects or General Purpose Outputs Three Output Lines Individually Configurable as Strobes or General Purpose Outputs Four Uncommitted Inputs Watchdog Monitors Host Computer Activity Low Battery Detect Input Direct Output for Piezo Transducer Support for Automatic Power Up/Down Prevents Host System Latchup with Powerback Control On Chip Crystal Oscillator GENERAL DESCRIPTION The PPC34C60 provides a means of re-generating an IBM AT style (ISA) bus from the PC printer port signals. In addition to Standard (Compatible) printer ports, the PPC34C60 supports PS/2 (bi-directional), EPP, and ECP ports. Up to eight peripherals may be daisy chained between the computer and the printer. Printer operation is unaffected. The PPC34C60 performs as an intelligent data mux. It multiplexes the printer port signals between the daisy chain (pass-through) outputs and there-generated ISA bus. Furthermore, it handles breaking up 8- and 16-bit ISA data into 4- or 8-bit chunks for the parallel port. The PPC34C60 also provides a piezo transducer driver for battery-powered systems. The transducer will signal low battery with two repeated beeps. If the cable to the computer is disconnected, or if the host is dormant for about a minute, the transducer will signal inactivity with four beeps. Additionally, a power-down signal can be provided to external circuitry to automatically shut down system power during inactivity. PPC34C60 |
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