Image processing apparatus, information processing apparatus and printer

An image processing apparatus for converting input data into image-forming output data by using programs or font data stored in at least one ROM circuit, and for outputting the image-forming output data, the image processing apparatus comprising:

• a CPU;
• at least one RAM circuit for storing at least one of output data or intermediate data converted by said CPU;
• a memory controller for controlling access by said CPU to said ROM circuit and said RAM circuit;
• and
• a first bus to which said memory controller and said CPU are connected, and a second bus to which said memory controller and said ROM circuit are connected, said at least one RAM circuit being connected to said first bus via a third bus whose signals are controlled by a pipeline register.

An information processing apparatus comprising:

• a CPU;
• a ROM circuit in which at least programs or data are stored;
• at least one RAM circuit for presenting a temporary storage area for said CPU;
• a memory controller for controlling access by said CPU to said ROM circuit and said RAM circuit;
• a first bus to which said memory controller and said CPU are connected;
• a second bus to which said memory controller and said ROM circuit are connected;
• and
• a third bus connected to said first bus through a pipeline register, said at least one RAM circuit being connected to said third bus.

A printer comprising:

• an image processor which converts input data into image-forming output data by using programs or font data stored in at least one ROM circuit, and which outputs the image-forming output data;
• and
• a printing mechanism for performing printing on the basis of said output data;
• wherein said image processor comprises:
• a CPU;
• at least one RAM circuit for storing at least one of output data or intermediate data converted by said CPU;
• a memory controller for controlling access by said CPU to said ROM circuit and said RAM circuit;
• and
• a first bus to which said memory controller and said CPU are connected, and a second bus to which said memory controller and said ROM circuit are connected, said at least one RAM circuit being connected to said first bus via a third bus whose signals are controlled by a bus driver.

A printer comprising:

• an image processor which converts input data into image-forming output data by using programs or font data stored in at least one ROM circuit, and which outputs the image-forming output data;
• and
• a printing mechanism for performing printing on the basis of said output data;
• wherein said image processor comprises:
• a CPU;
• at least one RAM circuit for storing at least one of output data or intermediate data converted by said CPU;
• a memory controller for controlling access by said CPU to said ROM circuit and said RAM circuit;
• and
• a first bus to which said memory controller and said CPU are connected, and a second bus to which said memory controller and said ROM circuit arc connected, said at least one RAM circuit being connected to said first bus via a third bus whose signals are controlled by a pipeline register.