参数资料
型号: MB89637RPF
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP64
封装: PLASTIC, QFP-64
文件页数: 82/153页
文件大小: 7326K
代理商: MB89637RPF
HARDWARE CONFIGURATION
2-11
When the external-bus function is used, the following pins become active at default.
A, AD, RD, WR, ALE, CLK, RDY, and BUFC
The external-bus pin-control register (BCTR) is used to switch the function of the pin controlling the external
bus for port 2 in the external-bus mode. When either of the bits is set to 0, the pin corresponding to the bit
serves as the port. In the single-chip mode, the contents of both bits are ignored and all 8 bits of port 2
serve as parallel ports. Access to this register is not allowed in modes other than the external-bus mode.
The structure of the BCTR is as follows:
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