| 摘要 |
<p>PURPOSE:To simplify a circuit constitution and to reduce the area of a board for a device using a programmable timer, by facilitating the setting of the baud rate with a change of software. CONSTITUTION:A microprocessor 2 changes the initial set value of a register in a programmable timer module 1 on the basis of the software stored in a memory 3. As a result, it is possible to deliver a signal phiout which is obtained by dividing an enable signal phiE or clock signal phiC down to an appropriate frequency. This signal phiout is used for a serial I/O interface 5 as a data transfer signal between an input/output device 6 and the interface 5. This facilitates the setting of the baud rate with a change of the software. As a result, the circuit constitution is simplified with a reduced board area.</p> |
