TS68230 Datasheet - STMicroelectronics

DESCRIPTION
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 or output. In the bidirectional modes the data direction registers are ignored and the direction is determined dynamically by the state of four handshake pins. These programmable handshake pins provide an interface flexible enough for connection to a wide variety of low, medium, or high speed peripherals or other computer systems.

■ 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 DIRECT LY ADDRESSABLE
■ REGISTERS ARE ADDRESSED FOR MOVEP (Move Peripheral) AND DMAC COMPATIBILITY