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.
|Published (Last):||24 July 2008|
|PDF File Size:||7.91 Mb|
|ePub File Size:||4.98 Mb|
|Price:||Free* [*Free Regsitration Required]|
The data format is one start bit, eight data bits, two stop bits, and no parity. The graphics modes and vertical offset bits are valid only in the CoCo mode, but the other two bits are valid anytime. The capacitance of the varactor is changed to tune the 4.
If the oscillator does not synchronize with the master oscillator, an apparent motion will exist whenever a color transition occurs. The secondary of the power transformer provides It contains the Master Oscillator, the frequency of which is controlled by a AC voltage is brought into the primary of transformer Tl. PAL input and transforms it to For the interrupt routines, registers are preserved on the Stack to be dtaasheet upon receipt of the RTI Return-from-Interrupt instruction.
Desc r ip t ion 1 1 1 C51 1 M-PLast ic 0. It is designed to provide the same reliable operation as its predecessor, but it incorporates the latest in electronic technology. A complete list and brief description of these signals is provided in Table 3. If there were no ROM, the CPU would read random floating states hd74ls734p the data bus, attempt to execute this, and promptly go haywire.
A Namefile block 3.
Antenna Switch Box Schematic Disconnect the cable from the wire connector which is attached to the keyboard Figure Execution will continue after HALT is removed. It is faster because it doesn’t preserve all registers as do the other interrupts.
The relationship between the data in the task register and the generated address is as follows: Then dagasheet the power transformer at the 3-pin connector on the main PCB Figure The processor may be HALTed indefinitely without any loss of internal data.
The first seven lines of data register A pins are programmed as inputs and are hd74ls347p to read the keyboard rows. The current rating of the secondary of the transformer is AC 2.
The information described here may contain technical inaccuracies or typographical datasheeet. The printer operates at baud. Standard troubleshooting techniques include these steps: If these products or technologies are subject to the Japanese export control restrictions, they must be exported under a license from the Japanese government and.
Stated another way, just because a particular program does not yield the results desired by the user, the eatasheet is not necessarily at fault. The strain relief on the power cord consists of wrapping the cord around the plastic bosses on the rear side of the unit. This level follows the input level up to 3. The most significant bit of data register A pin 9 is programmed as an input for the joystick interface.
It is also used as a reference for a comparator, the other input of which is one of the four dstasheet inputs. The final function of the SALT chip is to drive the cassette relay. For this purpose, the internal oscillator circuit of the IC is used.
Dqtasheet signal is provided to the video output terminal through buffer Q2, Q3 and to the modulator.
HD74LSP – HD – IC Chips – Kynix Semiconductor
This signal is then connected to the switch. One leader byte – 55H 2. Since the Color Computer 3 does not require multiprocessing, this line is permanently grounded.
Two bytes for the load address of a machine language program 5. This presents no problem as long as the memory is sufficiently fast. When the incoming signal is low, the transistor is cut off. AC Ripple Anode of D3 0. PIA IC5 is used mainly for the keyboard. The use of PIA compensates for a possible increase in key contact resistance due to prolonged use and therefore should result in a highly reliable keyboard interface.
However, since the DRAM package has only 18 pins, the addresses are multiplexed into two groups of 8 and 8, called row address and column address.
Online Electronic Components Shop
Dynamic memory is called dynamic because it requires refreshing at periodic intervals in order to remember. During High-Resolution mode, it generates 40 x 24 or 80 x 24 text screen, and x or x graphics screen.
These registers are divided into 2 sets, 8 registers per set. Ensure that the correct type is used when reassembl- ing. This chip is designed to generate a composite video signal from baseband red, blue, green and composite sync input from sync mixer Hd74ls37p and D15 – D It is apparent, for example, that all of the above areas will have problems when the power datasheett is dead.
This will prevent damage to the device or to the Color Computer 3.
Renesas Electronics – HD74LSP PDF 数据手册 , HD74LSP 数据表 – DataSheetBank
All information contained in these materials, including product data, diagrams, charts, programs and algorithms represents information on products at the time of. Diagnostic aids are available from Radio Shack National Parts to assist the technician in the servicing of the Color Computer 3. The TR bit of FF91 task register select bit determines which set is selected.
Data – to bytes 6.