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
Pinout
SpecificationsOperating Temperature Range.............................................................................................................0 to +70
Storage Temperature Range..............................................................................................................-55 to +150
Lead Temperature Range (soldering, 10 seconds)........................................................................................+325
Positive Voltage on any pin, with respect to Ground............................................................................ .....VCC+0.3V
Negative Voltage on any pin, with respect to Ground........................................................................................-0.3V
Maximum VCC.......................................................................................................................................................+7V DescriptionThe 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 Data Sheet
