X88C75

The X88C75 SLIC is a highly integrated peripheral for the 80C51 family of microcontrollers. The X88C75 integrates 8K-bytes of 5V byte-alterable nonvolatile memory,two bidirectional 8-bit ports, 16 general purpose registers,programmable internal address decoding and a multiplexed address and data bus.

The 5V byte-alterable nonvolatile memory can be used as program storage, data storage, or a combination of both. The memory array is separated into two 4K-bytes sections which allows read accesses to one section while a write operation is taking place in the other section. The nonvolatile memory also features Software Data Protection to protect the contents during power transitions, and an advanced Block Protect register which allows Individual blocks of the memory to be configured as read-only or read/write. Each X88C75 bidirectional port consists of 8 general purpose I/O lines and 1 data strobe line. The ports also feature a configurable interrupt request output.

Access to the X88C75 is accomplished through the multiplexed address/data bus of the 80C51 type controllers.An internal programmable address decoder maps the internal memory and register locations into the desired address space.