| 摘要 |
<p>PURPOSE:To stop a data converting circuit and to decrease the current consumption of a display controller by interrupting clock supply to a data converting circuit connected to a circuit comparing the contents of two registers storing data on consequtive addresses when the data is the same. CONSTITUTION:This controller is provided with the register 6a storing the data read out from a video memory VRAM 1, the register 6b storing the data on an address preceding an address corresponding to the former data, the coincidence circuit 7 comparing the contents of the data stored in the two registers, and a gate 8 interrupting the transmission of a clock signal to the data converting circuit 5. When the contents of the two registers 6a and 6b are coincident with each other, the gate circuit 8 interrupts the transmission of the clock signal to the data converting circuit 5. Thus, the data converting circuit is stopped and the current consumption consumed by data conversion can be decreased.</p> |
