When the cache is enabled, the buffer contains data transferred from the host with a write command. If a read command is issued to the sector address at this time, the ODD directly transfers data to the high-level equipment from the data buffer without reading it from media. If the cache is hit with a read command, the ODD makes the data in the hit segment being kept in the highest priority.

The data listed below cannot be stored in the read cache.

!Data once transferred to the host during prereading

!Data read before hardware reset, software reset, DEVICE RESET command is received, or power-off

!Data already stored before media is mounted

All buffer data is discarded under the following conditions:

!Hardware reset, software reset, DEVICE RESET command is received, or power-off

!When media is ejected

!When the FORMAT UNIT command is received

!In standby mode

!In sleep mode

!When the system receives a command (such as MODE SELECT and SET FEATURES) that may change the operating mode

4.4.5.3MO write cache

When the write cache is enabled, the ODD responds to the host with command end. This occurs when the data transfer is done with the WRITE (10), WRITE (12), or WRITE AND VERIFY command (hereafter "Write command" in this document). If Write commands are continuously issued, the ODD responds to the host with command end when the data transfer is completed. This occurs if the specified sector is continuous from the sector specified by the previous command.

The ODD writes data kept in the buffer to media under the following conditions:

!When data can be written on media during data transfer with a Write command or while the ODD is waiting for a command

!When a command that requires a new segment is received while all segments in the data buffer are used

!When the Eject switch is pressed

!When the SYNCHRONIZE CACHE command is received/DEVICE RESET command is received

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Fujitsu MCF3064AP, MCE3064AP, MCE3130AP manual MO write cache
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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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