TS68230 - STMicroelectronics

TS68230 HMOS PARALLEL INTERFACE/TIMER

The TS68230 parallel interface/timer (PI/T) provides versatile double buffered parallel interfaces and a system oriented timer for TS68000 systems. The parallel interfaces operate in unidirectional or bidirectional modes, either 8 or 16 bits wide. In the unidirectional modes, an associated data direction register determines whether each port pin is an input .

Features

of the PI/T include : TS68000 Bus Compatible Port Modes Include : Bit I/O Unidirectional 8 Bit and 16 Bit Bidirectional 8 Bit and 16 Bit Programmable Handshaking Options 24-Bit Programmable Timer Modes Five Separate Interrupt Vectors Separate Port and Timer Interrupt Service Requests Registers are Read/Write and Directly Addressable Registers are Addressed for MOVEP (Move Peripheral) and DMAC Compatibility 2/61 TS68230 Figure 1.1 : Block Diagram. 3/61 TS68230 Table 1.1 : Port Mode Control Summary. Mode 0 (unidirectional 8-bit mode) Port A Submode 00 - Pin-definable Double-buffered Input or.