b)Within 400 ns of receiving a command when the DRQ bit is not set

c)Between data transfer blocks of the PIO data-in/PIO data-out command when the DRQ bit is not set

d)After data block transfer with the PIO data-out command when the DRQ bit is not set

e)During DMA transfer when the DRQ bit is not set

In all other cases, the ODD does not set BSY.

If BSY is set after RESET- is negated, the SRST bit is set, or a Device Reset command is issued, it remains set until the ODD completes the internal reset process.

!DRDY (Device Ready) is always 1, except at the time after reset is made until the next command is issued.

!For SERVICE, set the same value as that of DRDY. The SERVICE bit should be ignored from the standpoint of compatibility.

!DRQ (Data Request) indicates that the ODD can transfer one byte or one word to or from the host. When DRQ is 1, the ATAPI Interrupt Reason register of the current packet command is effective.

!CORR (Corrected Data) is always 0.

!CHECK indicates that an error occurred in command processing. The Error register contains additional information on the cause of the error. When the ODD sets CHECK to 1, the items below are not changed until a new command is received or the ODD is reset.

!CHECK bit of the Status register

!Error register

!Device/Head register

C156-E142-02EN

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Fujitsu MCE3064AP, MCF3064AP, MCE3130AP manual
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MCE3130AP, MCE3064AP, MCF3064AP specifications

The Fujitsu MCF3064AP, MCE3064AP, and MCE3130AP are notable models in the realm of semiconductor technology and memory solutions. Each of these integrated circuits brings distinct features, technologies, and capabilities to various applications in modern electronics.

Starting with the MCF3064AP, this dynamic RAM device is built to provide efficient memory management and performance. It has a capacity of 64 kilobits, making it an ideal solution for early computer systems, embedded applications, and industrial electronics. The key characteristic of this chip is its fast access time, which facilitates quicker data retrieval and enhances overall system performance. The MCF3064AP supports a standard 16-pin DIP package, making it compatible with a variety of circuit designs, simplifying integration into existing systems.

On the other hand, the MCE3064AP also offers a 64 kilobit memory capacity but comes with enhanced features aimed at improving power efficiency and performance stability. This version is well suited for battery-operated devices where power consumption is a critical consideration. With its advanced static RAM architecture, the MCE3064AP ensures lower power usage while maintaining high-speed performance. Its operational characteristics allow it to function seamlessly over various temperature ranges, making it suitable for diverse application environments.

Lastly, the MCE3130AP distinguishes itself by offering an increased memory capacity of 128 kilobits. This model is tailored for applications that require higher data storage, such as telecommunications and networking equipment. The MCE3130AP employs sophisticated memory technology that not only optimizes data transfer rates but also enhances durability and reliability. It features an optimized pin configuration allowing easy integration into modern systems, along with advanced error detection and correction functionalities, ensuring data integrity across critical applications.

Collectively, the Fujitsu MCF3064AP, MCE3064AP, and MCE3130AP exemplify innovations in memory technology, catering to a wide range of electronic applications. Their distinctive features, varying capacities, and high-performance characteristics make them essential components in the advancement of computing systems and electronic devices. As technology continues to evolve, these semiconductor solutions from Fujitsu pave the way for more efficient, reliable, and powerful electronic systems.
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