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器件描述：PARALLEL PORT INTERFACE CHIP PERIPHERAL SIDE
器件厂商：SMSC [SMSC Corporation]
厂商主页：http://www.smsc.com/
文件大小：350.83KB
文件页数：58
PDF阅读：34C60.pdf (点击阅读器件资料)
摘要：
SMSC DS – PPC34C60 Rev. 06/01/2001
ADVANCED INFORMATION
Parallel Port Interface Chip - Peripheral Side
FEATURES
null Creates PC/AT-Style Bus from Parallel Printer Port
Signals
null Single Chip Interface to Any Bus Capable Peripheral
null Supports Standard, Bi-Directional, EPP, and ECP
Parallel Ports
null Burst Mode for Improved Data Transfer Rates
null Adaptive Interface Optimizes Transfer Rates to
Parallel Port Characteristics
null Digital Signal Filtering Increases Noise Immunity
null Allows Daisy-Chain of up to Eight Peripherals
Including Standard Printer
null Provides Interrupt Sharing with Daisy-Chained
Devices
null 16-Bit Product ID Support
null Peripheral Bus Clock Selectable at System Clock /2,
/3, /5, or /6
null Interfaces to 8-Bit and/or 16-Bit Peripherals
null FIFO Operation Permits Overlapping Parallel Port and
Peripheral Bus Cycles for Maximum Data Transfer
Rate
null Flexible DRAM Buffer Support and DMA Capability
null Four Output Lines Individually Configurable as Chip
Selects or General Purpose Outputs
null Three Output Lines Individually Configurable as
Strobes or General Purpose Outputs
null Four Uncommitted Inputs
null Watchdog Monitors Host Computer Activity
null Low Battery Detect Input
null Direct Output for Piezo Transducer
null Support for Automatic Power Up/Down
null Prevents Host System Latchup with Powerback
Control
null 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
相关器件：PPC34C60
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