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CHAPTER 4 External Bus Interface
4.1 Overview of External Bus Interface
The external bus interface controls the external memory and interface with the external
I/O.
■ Feature of External Bus Interface
• 16-bit (64KB) address output
• Only 1 bank can be set by the chip select function
- Capable of setting by the 64KB in the arbitrary position on the logical address space
• Capable of setting a 16-/8-bit bus width
• Insertion of the programmable auto memory wait (maximum for 7 cycles)
• Support for the time division I/O interface of address and data
• Support of little endian mode