X68C75

APPLICATION NOTES A V A I L A B L E AN62 AN64 X68C75 SLIC®AN66 E2 AN74 SLIC X68C75 SLIC® E2 Microperipheral Port Expander and E2 Memory High Performance CMOS —Fast Access Time, 120ns —Low Power 60mA Active 100µA Standby PDIP, PLCC, and TQFP Packaging Available DESCRIPTION The X68C75 is a highly integrated peripheral for the 68HC11 family of microcontrollers. The device integrates 8K-bytes of 5V byte-alterable nonvolatile memory, 2 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-byte 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. FEATURES Highly Integrated Microcontroller Peripheral —8K x 8 E2 Memory —2 x 8 General Purpose Bidirectional I/O Ports —16 x 8 General Purpose Registers —Integerated Interrupt Controller Module —Internal Programmable Address Decoding Self Loading Integrated Code (SLIC) —On-Chip BIOS and Boot Loader —IBM/PC Based Interface Software(XSLIC) Concurrent Read During Write —Dual Plane Architectur...