| 摘要 |
A mobile data terminal and a communication method therefor enabling CPU power consumption to be reduced by changing a setting of a CPU operation clock signal to a lower frequency than in a busy state and by maintaining a frequency of a memory access clock signal at the same level as in the busy state. If the mobile data terminal is put in a wait state within or outside a service area, the present invention uses a CPU clock control means to control a CPU operation clock signal, which has been set in the busy state of the mobile data terminal, to be set to a lower-speed CPU operation clock signal and uses a memory access clock control means to control a memory access clock signal supplied to a memory controller, which is provided in the mobile data terminal and for use in regulating an external memory access speed and a CPU operation speed, to be maintained at the same level as for a memory access clock signal set in the busy state of the mobile data terminal, simultaneously with the setting change of the CPU operation clock signal. <IMAGE> |
