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 pa- rallel Interfaces operate in unidirectional or bidirectio- nal 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 direc- tion Registers are ignored and the direction is deter- mined 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. The PI/T ports allow use of vectored or auto-vectored interrupts, and also pro- vide a DMA request pin for connection to the 68440 direct memory access controller (DMAC) or a similar circuit. The PI/T Timer contains a 24-bit wide Counter and a 5-bit prescaler. The Timer may be clocked by the system Clock (PI/T CLK pin) or by an external Clock (TIN pin), and a 5-bit prescaler CAN be used. It CAN generate periodic interrupts, a square wave, or a single interrupt after a programmed time period. It CAN also be used for elapsed time measurement or as a device watchdog. By STMicroelectronics
TS68230 's PackagesTS68230 's pdf datasheet

TS68230 Pinout, Pinouts
TS68230 pinout,Pin out
This is one package pinout of TS68230,If you need more pinouts please download TS68230's pdf datasheet.

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