MT90840

 

 

 

 

 

 

Preliminary Information

 

 

 

 

 

 

CPU

 

 

 

 

 

MT90840

 

 

 

 

 

 

8 kHz TX

PPFT

SFDI = 0

STi0-7

8

STi/o 0-7

 

8

Data TX

8

STi/o 0-7

 

PDo0-7

 

STo0-7

ST-BUS

 

 

 

 

 

 

 

TX/RX Clock

 

 

 

 

 

Components

8

Data RX

PCKR

 

 

 

 

4.096 MHz

PDi0-7

 

SPCKo

 

 

 

 

8 kHz

 

8 kHz

8 kHz RX

 

 

F0o

 

 

PPFRi

C4/8R1 & 2

 

 

Source

 

 

 

 

 

 

 

4.096 MHz or

 

 

 

 

 

 

8.192 MHz

 

 

 

 

 

 

PLL

 

 

 

(8.192 MHz)

 

 

 

 

 

 

 

 

 

 

 

PPFT

C4/8R1 & 2

 

8

STi/o 0-7

 

 

 

 

STi0-7

 

8

Data TX

 

8

STi/o 0-7

 

PDo0-7

 

STo0-7

 

 

 

 

 

 

 

8

Data RX

PCKR

 

 

 

 

4.096 MHz

 

PDi0-7

 

SPCKo

 

 

 

 

 

 

 

 

 

 

F0i

 

 

 

 

 

PPFRi

SFDI = 1

 

 

 

 

 

 

 

MT90840

 

 

 

 

 

 

 

 

 

 

 

CPU

 

 

Figure 6b - TM2 Multiple-MT90840 Configuration

 

Timing Mode 3 (TM3) - Bus Slave

Synchronous Parallel Port With ST-BUS Clock Slave

Timing Mode 3 is used where the main TDM clock ref- erence resides on the parallel port side of the system, and where the receive parallel port and the transmit parallel port are aligned. (An example is a node on a backplane.) Timing on the serial port is tightly tied to the receive parallel port, and the transmit parallel port is clocked by the receive parallel port clock. In TM3, PCKT and PPFTo are not used. See Figure 7 for a connection example.

In TM3, the MT90840 timing is controlled by the parallel port frame pulse (PPFRi) and clock (PCKR).

The MT90840 generates the serial port output frame pulse (F0o) locked to PPFRi. TM3 is similar to TM2 with two main differences: the parallel Bypass Path is disabled, and the parallel port receive and transmit buses are synchronized and both aligned with PPFRi. A fixed offset exists between F0o and PPFRi due to serial-to-parallel conversion. The MT90840 will align F0o so that it proceeds PPFRi by 3.8 μsec.

In TM3 the internal clock divider circuit is always enabled, regardless of the state of the INTCLK bit (C4/8R1 and C4/8R2 are unused). Therefore TM3 is limited to 19.44 and 16.384 Mbyte/s parallel port rates, and 2.048 and 4.096 Mbps serial port rates.

 

 

 

MT90840

 

 

 

 

Aligned

8

 

PDi0-7

STi0-7

8

STi/o 0-7

 

8

 

8

STi/o 0-7

 

Frames

 

PDo0-7

STo0-7

ST-BUS

 

8 kHz REF

 

8 kHz

 

PPFRi

 

 

 

Components

Source

 

 

 

 

8 kHz

 

 

 

 

F0o

 

 

 

 

RX/TX Clock

 

 

4.096 MHz

 

 

 

PCKR

SPCKo

 

 

 

 

 

 

 

 

CPU

Figure 7 - Timing Mode 3 Configuration

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Image 14
Mitel manual Synchronous Parallel Port With ST-BUS Clock Slave, Sfdi = MT90840

MT90840 specifications

The Mitel MT90840 is an advanced telecommunications device designed to enhance connectivity and communication capabilities for various applications. With its robust array of features and technologies, the MT90840 is well-suited for businesses looking to improve their communications infrastructure.

One of the standout features of the Mitel MT90840 is its integration of voice and data services. This allows users to manage their communications more efficiently, streamlining operations and reducing costs. The device supports a wide range of voice codecs, ensuring high-quality audio during calls and providing flexibility for users who may require different standards for different applications.

Another key characteristic of the MT90840 is its scalability. The device is designed to grow with the needs of a business. It supports multiple lines and can be configured to handle an increasing number of users without compromising performance. This scalability is particularly advantageous for organizations that may undergo growth or changes in their communication needs over time.

The Mitel MT90840 also incorporates advanced networking technologies, such as VoIP (Voice over Internet Protocol). This allows users to make voice calls using the internet rather than traditional phone lines, reducing costs for long-distance calls and improving overall communication efficiency. The device is equipped with features that support secure, encrypted communication, further protecting sensitive data and conversations from potential breaches.

Additionally, the MT90840 is designed with user-friendliness in mind. It features an intuitive interface that simplifies operation, making it accessible even for those who may not be tech-savvy. The device is compatible with various peripherals, such as headsets and conferencing equipment, further enhancing its usability in diverse settings, from small offices to large conference rooms.

Moreover, the Mitel MT90840 offers excellent interoperability with a variety of third-party applications. This flexibility enables organizations to integrate the device into their existing systems seamlessly, thereby enhancing productivity without requiring a complete technological overhaul.

In conclusion, the Mitel MT90840 stands out as a versatile and reliable telecommunications solution. Its rich feature set, including voice and data integration, scalability, VoIP capabilities, user-friendly interface, and interoperability, makes it an ideal choice for businesses looking to elevate their communications strategy.