| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an output device for microcomputer, where exclusive control due to software is not required at the time of register access. SOLUTION: An output part 17a for bit '0' of an A-1 register 11 and an output part 18a for bit '0' of an A-2 register 12 are respectively connected to input parts 19a and 19b of an OR gate 13a and a signal line 15a from the output part of this OR gate 13a is connected to one pin of a microcomputer chip 20. Similarly, an output part 17b for bit '1' of the A-1 register 11 and an output part 18b for bit '1' of the A-2 register 12 are respectively connected to input parts 19c and 19d of an OR gate 13b and a signal line 15b from the output part of this OR gate 13b is connected to two pins of the microcomputer chip 20. A similar circuit is constituted up to the bit '7' of each of registers as shown in a figure 1.</p> |
