CDP68HC68P1

® CDP68HC68P1 Data Sheet September 2003 FN1858.3 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 Peripheral Interface) 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. This device also features a compare function that compares the data register and port pin values for 4 programmable conditions and sets a software accessible flag if the condition is satisfied. The user also has the option of bit-set or bit-clear when writing to the data register. Features Fully Static Operation Operating Voltage Range 3-6V Compatible with Intersil/Motorola SPI Bus 2 External Address Pins Tied to VDD or VSS to 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 PKG. NO. Ordering Information PART NUMBER CDP68HC68P1E CDP68...