HD74LSP Specifications: Gate Type: NAND ; Supply Voltage: 5V ; Logic Family: TTL ; Inputs: 8 Details, datasheet, quote on part number: HD74LSP . The semiconductor operations of Mitsubishi Electric and Hitachi were transferred to Renesas. Technology Corporation on April 1st HD74LSP from Renesas Electronics. Find the PDF Datasheet, Specifications and Distributor Information.

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CA2 and CB2 pins 19 and 39 are used as outputs. Foreground color bit pallette addr. When a value is loaded into the MSB, the count is automatically begun. PIA IC5 is used mainly for the keyboard.


It is designed to provide the same reliable operation as its predecessor, but it incorporates the latest in electronic technology. All information contained in these materials, including product data, diagrams, charts, programs and algorithms represents information on products at the time of. Additional peripheral devices, such as an external disk drive, may be added to the Color Computer 3 for additional memory storage and retrieval.

The switch is specially designed to provide the 60 dB of isolation required between the computer and the TV antenna. Joystick Schematic 5. For use with the printer, the pin assignment of the connector differs slightly from the above description: R14 serves to load the capacitively-coupled output characteristic of dataaheet portable cassette recorders, and R18 limits the current of the incoming signal to prevent damage to the SALT chip if an excessively large peak-to-peak voltage is fed into the cassette input.


If the DAC is used as a sound source, the microprocessor simply feeds a succession of values to the six bits of the DAC in hd74ls734p to produce the desired waveshape.

One block type byte: In normal operation, the CPU jumps to the start address in Datsaheet, after the reset switch has been pressed, datasehet then performs the reset program to set up all of the programmable devices.

A blank section of tape equal to approximately 0. It is, therefore, recommended that the technician be thoroughly familiar with the operation of the Color Computer 3, as well as the Theory of Operation.

This will allow a “virtual” screen somewhat larger than the displayed screen. The address count must toggle through all row address possibilities in 4 milli- seconds or less.

HD74LS374P 数据手册 ( 数据表 ) – Renesas Electronics

Two different types of screws are used to mount the PCB and the top and bottom cabinet. Descr ipt i on RS Part No. The TV antenna is attached directly to the switch box.


A list of all the printer variables is given in Table 1. These are the RGB values. In order to operate, he74ls374p software must make several assumptions about the printer.

Data – to bytes 6. If less than that, they are considered to be a mark. Scope settings are noted on the individual waveform diagrams. TTL level positive Vsync: Descr i pt ion RS Part No. PIA IC4 is used for several different functions.

In addition, the same RAM is used to generate the video display. Pin 12 of register B is an input for the memory size. These clock signals must be present for the CPU to function. Trouble with semiconductors may lead to personal injury, fire or property damage.


Check AC Cord and Replace. For the video generation circuit where the control register is designated via software, please refer to the Memory Map in section 1.

Note that there are sixteen address lines AO through A Figure shows the keyboard matrix. It will also do a line feed at this time.