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

Page 14

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

2-244

Page 13 Page 15
Image 14
Page 13 Page 15
Contents Features ApplicationsPIN Plcc Pin ConnectionsDescription 100 Pin DescriptionPin # No ConnectionTDI PckrPckt +5 Volt Power Supply GroundDevice Operation Time Slot Interchange Operation SwitchingFunctional Description PPFRi PDi0-7 C4/8R1&2 4 MHz Serial I/O 2 MbpsSerial I/O 4 Mbps C4/8R1&2 8 MHz Serial I/O 8 Mbps Pckr or Pckt TCP bit = PPFTi/o Ppfp bit =1 PDo0-7Receive Path Bypass/Parallel-Switching PathTransmit Path Serial Data Port Parallel Data Port Parallel Port Clock Signals and FramingSerial Frame Pulse Timing Mode 1 TM1 Ring Master Timing and Switching ControlOutput Driver Enable Control Capability Asynchronous Parallel Port With ST-BUS Clock MasterAsynchronous Parallel Port With ST-BUS Clock Slave Timing Mode 2 TM2 Ring SlaveTM1 Multiple-MT90840 Sub-Mode Pfdi TM2 Multiple-MT90840 Sub-Mode Sfdi External PLL and C4 Phase-CorrectionInternal 4.096 MHz Clock Divider Sfdi = MT90840 Synchronous Parallel Port With ST-BUS Clock SlaveSfdi = Per-channel Bypass on the Parallel Port MT90840 Throughput DelayMT90840 Per-channel Functions Per-channel Control Outputs on the Parallel PortMode Data Rates Minimum Delay Total Throughput Delay MT90840 Throughput Delay SummaryPer-channel Tri-state Serial and Parallel Per-channel Message Mode Serial and ParallelSTi0 STo0 Per-channel Direction Control on the Serial PortSerial Data Memory Addressing Addressing2.048 Mbps Add/Drop Mode Tpdm Addressing IRQ Interrupt Pin Microprocessor PortAddress Mapping of the Internal Registers DTA Data Transfer Acknowledgment PinMT90840 Register Address Mapping Accessing Internal MemoriesHex Detecting Clock Presence Clock Quality and TM1 Tpcm Access IntegrityClock Quality and TM2 Rpcm Access Integrity Memory Block-ProgrammingTiming Mode Initialization Jtag SupportI01 Instruction Description Test Access Port TAPBoundary-Scan Instruction Register Boundary-Scan Instruction RegisterBoundary-Scan Register Cells Definitions Test Data RegistersCells Definition HighRegister Description Interface Mode Selection Register IMS READ/WRITETiming Mode Register TIM READ/WRITE DR1General Purpose Mode Register GPM READ/WRITE Alarm Status Register ALS READ/WRITEPhase Status Registers PSD Read Only Control Register CR READ/WRITEInternal Memory Description AB9 AB8AB11 AB10 Distributed Isochronous Network CTI Distributed Architecture Implemented with the MT90840Characteristics Sym Min Typ‡ Max Units Test Conditions/Pins Parameter Symbol Min Max UnitsCharacteristics Sym Min Typ Max Units Test Conditions Absolute Maximum RatingsCharacteristics Sym Min Typ‡ Max Units Test Conditions TM1Output Pin Test Point Characteristics Sym Min Typ‡Units Test Conditions Serial Port with Negative Polarity F0 ST-BUS Serial Port with Positive Polarity F0 GCISerial Port Timing for 2.048 Mbps TM2 SFDi = 0 and TM3 267 F0 Frame Sync with Negative Polarity Spfp = F0 Frame Sync with Positive Polarity Spfp =Serial Port Timing for 8.192 Mbps TM1 and TM2 SFDi = Frame Sync with Positive Polarity Spfp = Frame Sync with Negative Polarity Spfp =Timing for the Parallel Port External Control Lines CTo0-3 AC Electrical Characteristics Parallel Data Port Parallel Port Receive TimingParallel Port in Timing Mode RD/WR 774 Up to 3 C4 cycles + Register takd-wrIntel/National Multiplexed Bus Timing AD0AC Electrical Characteristics† Motorola Multiplexed Bus Mode Characteristics Sym MinAD0-7 AD0-13Parameter Symbol Min Max Units Test Conditions Boundary Scan Test Port TimingNot to scale Dimensions in inches are not exactDim Min Max 280

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.
Top Page Image Contents