68HC68P1M

Product Details

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CMOS Serial 8-Bit Input/Output Port

**The CDP68HC68P1 is a serially addressed 8-bit Input/Output port that

allows byte or individual bit control. It**

consists of three registers, an output buffer and control logic. Data is shifted in and out of the device via shift register that utilizes the SPI (Serial PeripheralInterface) bus. The I/O port data flow is controlled by the Data Direction Register and data is stored in the Data Register that outputs or senses the logic levels at the buffered I/O pins. All inputs, including the serial interface are Schmitt triggered.

Features

• Fully Static Operation
• Operating Voltage Range 3-6V
• Compatible with Intersil/Motorola SPI Bus
• 2 External Address Pins Tied to VDDor VSSto Allow Up to 4 Devices to Share the Same Chip Enable
• Versatile Bit-Set and Bit-Clear Capability
• Accepts Either SCK Clock Polarity - SCK Voltage Level is Latched When Chip Enable Goes Active
• All Inputs are Schmitt-Trigger
• 8-Bit I/O Port - Each Bit can be Individually Programmed as an Input or Output Via an 8-Bit Data Direction Register
• Programmable On Board Comparator
• Simultaneous Transfer of Compare Information to CPU During Read or Write - Separate Access Not Required