Part 4: Technical Reference

BJC-7100

DRAM controller

The DRAM controller controls the 10-bit addressing, reading/writing, RAS/CAS, and refresh of the 8Mbit DRAMs (4Mbit ×2).

Chip select controller

The chip select controller shows that a valid address has been output for the set area. The chip select controller is connected to the CARTRIDGE button, RESUME button, POWER button, and printer controller.

Clock & power manager

The clock and power manager controls the transition to low power-consumption mode. The WAKE UP pin is connected to the reset IC, and inputs the request to wake up from low power-consumption mode.

2) Printer controller (IC2)

The printer controller includes the CPU interface, DRAM interface, Centronics interface controller, print head controller, data processing controller, and IO ports, etc.

CPU interface

The CPU interface controls the writing to and reading from the CPU in sync with a 20MHz external clock input.

DRAM interface

The DRAM interface controls the 10-bit address and 16-bit data bus, the reading and writing, RAS/CAS, and refresh of the 8Mbit DRAM through the DRAM bus, which is independent of the MPU bus.

Centronics interface controller

The Centronics interface controller uses handshaking using the BUSY and ACKNLG signals to receive the 8-bit parallel data sent in sync with the data strobe (STROBE) signal from the host PC. It also controls the other interface signals. The data received from the interfaces is stored in the DRAM receive buffer. The MPU analysis this data and, if deemed to be print data, it is processed by the DMA.

When the printer initialize (INIT) signal is input from the interface, the Centronics interface controller outputs a BUSY signal. When INT0 is output to the MPU, the printer is initialized after any print data in the print buffer has been printed.

Print head controller

To drive the print head, the print head controller outputs the block signal and heat enable signal at the same time as the print data read from the DRAM print buffer is sent as serial data to the print head.

The transfer of print data (IDATA OM, IDATA BK, IDATA PH, IDATA CL) to the print head is synchronized to the 5MHz clock HDCLK signal. The block signals (BE0, BE1, BE2, ODDE, and EVENE), the pulse signals (HEAT OM, HEAT BK, HEAT PH, and HEAT CL), and the head temperature signals (SHON OM, SHON BK, SHON, PH, and SHON CL) are output to drive the print head.

Data processing controller

The data processing controller processes the data in the print buffer by DMA.

The data processing controller performs palette expand processing of the print data for photo printing, 1200dpi smoothing, and conversion of the raster print data into column oriented print data

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Canon QY8-1360-000 Dram controller, Chip select controller, Clock & power manager, Printer controller IC2, CPU interface

QY8-1360-000 specifications

The Canon QY8-1360-000 is a highly regarded print head designed specifically for Canon’s line of professional printers, particularly those used in high-quality photo printing and graphic arts. This component is essential for achieving the vibrant colors and sharp details that are hallmark features of Canon’s imaging technology.

One of the main features of the QY8-1360-000 is its precision engineering, which allows for a high level of accuracy in ink application. This print head utilizes a micro-nozzle technology that enhances the distribution of ink onto the paper, minimizing the potential for blurriness or color bleeding. The micro-nozzles work in conjunction with a sophisticated ink delivery system, ensuring that colors are produced as intended by the original digital file.

Another key characteristic of the QY8-1360-000 is its ability to support a wide range of media types, ensuring flexibility for various printing projects. Whether it’s glossy photo paper, fine art paper, or even canvas, this print head can accommodate different textures and finishes, making it ideal for both professional photographers and graphic designers.

Additionally, this print head is designed to achieve high resolution printing, with capabilities that can reach up to 4800 x 1200 dpi. Such high resolution allows for exceptional detail and color accuracy, which is particularly critical when producing photographic prints. The print head can also handle a broad color gamut, facilitating rich and vivid color outputs that elevate the overall quality of printed materials.

Technologically, the QY8-1360-000 incorporates Canon’s FINE (Full-Photolithography Inkjet Nozzle Engineering) technology. This innovative technology allows for the quick heat-up and ejection of ink, ensuring rapid print speeds without compromising quality. By combining speed with precision, it significantly enhances productivity in a professional setting.

In summary, the Canon QY8-1360-000 print head is an essential component for anyone seeking exceptional print quality and versatility in their printing endeavors. With precision engineering, support for multiple media types, high resolution output, and advanced FINE technology, it represents a significant advancement in Canon’s commitment to delivering outstanding imaging solutions. Whether used in a studio, print shop, or home office, the QY8-1360-000 enhances the quality and efficiency of printing workflows, making it a vital tool for creative professionals.