| 摘要 |
PROBLEM TO BE SOLVED: To provide a stepping motor control circuit in which a load with respect to a CPU is small and data transfer is considered. SOLUTION: When a period setting registered value matches with a counter value in a comparator, it becomes an interruption cause to the CPU, and a start of a data transfer system is permitted. When the start is permitted, a system accesses to a vector address and an address in which a data transfer block 10 is arranged is read from it. The addresses of a transfer destination and a transfer source are written in the data transfer block 10. Thus, plural pieces of data can be transferred with one transfer instruction, and the load to the CPU is reduced. A transfer source address and a transfer destination address are given in the transfer of an exciting pattern and pulse period data. Thus, the number of data transfer times is reduced and the load to the CPU is reduced. A channel selector selects a motor driver and a plurality of motors can be moved with transferred data on a RAM. COPYRIGHT: (C)2003,JPO |
