| 摘要 |
<p>PURPOSE: To reduce the load of a CPU by controlling plural channel timers, in which individual channels independently executes functions for a fixed time, by means of a private single purpose processor so as to improve a timer used for plural channel timer system. CONSTITUTION: When an MTSRE control signal from a service processor is active, it becomes possible to generate a transition detecting service request signal and a matching recognition request signal. Until the state of the MTSRE signal at each channel is latched and the state of MTSRE changes, the state is kept. Then when a pin 140 detects transition, a transition detecting latch 145 is set and an acquiring event 148 triggers the loading of an acquiring register 131 by the value of a selected TCR bus to consecutively acquire one state. Thereby the interposing of the CPU is reduced to reduce its load.</p> |
