Head substrate having data memory, printing head, printing apparatus and producing method therefor

A printing head detachably mounted on a printer main body comprising:

• plural external connection terminals individually receiving, from the exterior, a binary logic signal corresponding to whether or not to execute a recording operation, a recording image signal and a clock signal;
• recording execution means for executing the recording operation according to the recording image signal and the clock signal entered through said external connection terminals, in case the binary logic signal is in a first state;
• data memory means for executing a memory access which is at least either of data writing and data readout;
• and
• memory access means for recognizing the binary logic signal as an access permission signal and executing the memory access to said data memory means in case the logic signal is in a second state;
• wherein said external connection terminals include:
• first common terminal wiring means for supplying the externally entered binary logic signal to said memory access means and to said recording execution means;
• and
• second common terminal wiring means for supplying the externally entered clock signal as a recording clock signal to said recording execution means and as a memory clock signal to said memory access means.

A printing apparatus comprising:

• a printing head detachably mounted on a printer main body comprising a head substrate comprising
• plural external connection terminals individually receiving, from the exterior, a binary logic signal corresponding to whether or not to execute a recording operation, a recording image signal and a clock signal;
• recording execution means for executing the recording operation according to the recording image signal and the clock signal entered through said external connection terminals, in case the binary logic signal is in a first state;
• data memory means for executing a memory access which is at least either of data writing and data readout;
• and
• memory access means for recognizing the binary logic signal as an access permission signal and executing the memory access to said data memory means in case the logic signal is in a second state;
• input means for individually transmitting the binary logic signal of the first state and various signals such as the recording image signal and the clock signal respectively to plurality of said external connection terminals of said printing head, causing said recording execution means to execute a recording operation;
• and
• access control means for transmitting the binary logic signal of the second state and the clock signal to said plural external connection terminals of said printing head, causing said memory access means to execute the memory access.

A printing apparatus comprising:

• a printing head detachably mounted on a printer main body comprising:
• plural external connection terminals individually receiving, from the exterior, a binary logic signal corresponding to whether or not to execute a recording operation, a recording image signal and a clock signal;
• recording execution means for executing the recording operation according to the recording image signal and the clock signal entered through said external connection terminals, in case the binary logic signal is in a first state;
• data memory means for executing a memory access which is at least either of data writing and data readout;
• and
• memory access means for recognizing the binary logical signal as an access permission signal and executing the memory access to said data memory means in case the logical signal is in a second state;
• input means for individually transmitting the binary logic signal of the first state and various signals such as the recording image signal and the clock signal respectively to said plurality of external connection terminals of said printing head, causing said recording execution means to execute a recording operation;
• and
• access control means for transmitting the binary logic signal of the second state and the clock signal to said plural external connection terminals of said printing head, causing said memory access means to execute the memory access.