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Step Technica MKY02 User Manual

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STD-HLS02-V1.7E
MKY02
HUB-IC
User's Manual
(for Hi-speed Link System)

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  • Page 1 STD-HLS02-V1.7E MKY02 HUB-IC User’s Manual (for Hi-speed Link System)
  • Page 2 Note 1. The information in this document is subject to change without prior notice. Before using this product, please confirm that this is the latest version of this document. 2. Technical information in this document, such as explanations and circuit examples, are refer- ences for this product.
  • Page 3 MKY02 User’s Manual Preface This manual describes the MKY02, or a kind of HUB-IC in a Hi-speed Link System. Be sure to read before understanding this manual “Hi-speed Link System Introduction Guide” and the MKY02. In this manual, the Hi-speed Link System is abbreviated as “HLS”.

  • Page 4: Table Of Contents

    3.4.1 Packet Receive Monitor .................... 3-11 3.4.2 Packet Error Monitor ....................3-12 3.4.3 Port Receive Monitor....................3-13 Handling Cascade Connection Pins..............3-15 Cautions for Designing HUB ................3-15 Example Circuit for Single Connection of MKY02 ........... 3-16 - iv -...
  • Page 5 MKY02 User’s Manual Chapter 4 Cascade Connection of MKY02 Concepts of Port Addition..................4-3 4.1.1 Port Addition by Stacking Method................4-3 4.1.2 Port Addition by Cascade Connection ..............4-4 4.1.3 Maximum Available Cascade Connections............... 4-4 Practical Side of Cascade Connection..............4-5 4.2.1...
  • Page 6 Fig. 1.11 Example of Signal Transformation and Correction ......... 1-13 Fig. 2.1 MKY02 Pin Assignment................2-3 Fig. 2.2 Pin Electrical Characteristics in I/O Circuit Types of MKY02 ....2-6 Fig. 3.1 Connection Causing Leakage Current............3-4 Fig. 3.2 Cascade Clock Generation ................3-6 Fig.
  • Page 7 Tables Table 1-1 Baud Rates and Recommended Total Extension Number of Inserted HUBs ..................1-4 Table 2-1 Pin Functions of MKY02 ................2-4 Table 2-2 Electrical Ratings of MKY02................ 2-6 Table 3-1 Output Frequencies of Cascade Clocks ............ 3-6 Table 5-1 Absolute Maximum Ratings ................ 5-3 Table 5-2 Electrical Ratings ..................
  • Page 8 MKY02 User’s Manual (for Hi-speed Link System) - viii -...
  • Page 9 Chapter 1 Concepts for Using MKY02 (HUB) This chapter describes the concepts for using the MKY02 (HUB) in the Hi-speed Link System (HLS). 1.1 Role of MKY02................1-3 1.2 Basic HLS Configuration ..............1-3 1.3 HLS Configuration using HUBs............1-4 1.4 Basic HUB Connection..............1-9 1.5 Multi-drop Network of HUBs............1-10...

  • Page 11: Chapter 1 Concepts For Using Mky02 (Hub)

    This chapter describes the concepts for use of the MKY02 (HUB) in the HLS. 1.1 Role of MKY02 MKY02 is a kind of HUB-IC that constitutes a HUB to be used in the HLS network. Be sure to read “Hi-speed Link System Introduction Guide”...

  • Page 12: Hls Configuration Using Hubs

    MKY02 User’s Manual (for Hi-speed Link System) 1.3 HLS Configuration using HUBs Adding HUBs to the HLS network, the user system can satisfy it’s own needs (1) to (3) described above. When adding a HUB to the network, the center IC constituting the HLS must be compatible with the HUB.
  • Page 13 Chapter 1 Concepts for Using MKY02 (HUB) The practical limit of network cable length varies with the performance of drivers/receiv- ers, cable types, cabling environments, and how many cables are multi-drop connected. StepTechnica's recommended network cable length is about 1/2 of the cable length limit obtained from our practical experiments.

  • Page 14: Branching Multi-Dropped Network Cables

    The network cables can be branched by adding HUBs to the HLS network. Figure 1.3 shows an example of an HLS configuration in which network cables are branched. Figure 1.3 shows the network cables that are branched in T shape. Adding a HUB using the MKY02 also enables multiple branchings with many ports.

  • Page 15: Eliminating Connection Or Disconnection Of Termination Resistor To Or From Each Device

    Chapter 1 Concepts for Using MKY02 (HUB) 1.3.3 Eliminating Connection or Disconnection of Termination Resistor to or from Each Device In a network using the HLS, termination resistors (Rt) cannot be connected to the terminal connected in the intermediate position (the halfway position in the network cable) of the multi-drop network. However, a “one-to-one”...

  • Page 16: Star Topology

    MKY02 User’s Manual (for Hi-speed Link System) 1.3.4 Star Topology Mounting a HUB-IC to the terminal containing the center IC of the HLS can offer a star topology (Fig. 1.5). Furthermore, network cables in a star topology can also be multi-drop-connected.

  • Page 17: Basic Hub Connection

    Chapter 1 Concepts for Using MKY02 (HUB) 1.4 Basic HUB Connection When adding HUBs to the HLS, connect them so that the HLS can be a tree structure as shown in Figure 1.6. In such a tree structure, the route node close to the center equipment is called the “center side”. Be sure to connect port 0 to the center side.

  • Page 18: Multi-Drop Network Of Hubs

    MKY02 User’s Manual (for Hi-speed Link System) 1.5 Multi-drop Network of HUBs When adding HUBs to the HLS, the user can connect HUBs as multi-drop (Fig. 1.7). The multi-drop network of HUBs is suitable for a user system in which the network cables should be divided.

  • Page 19: Port Addition To Hub

    Chapter 1 Concepts for Using MKY02 (HUB) 1.6 Port Addition to HUB By cascading MKY02s, the user can add more ports to a HUB composed of the MKY02. For example, a cascade connection of three MKY02s enables the HUB to have port 0 connecting the center side and 21 ports (7 ports ×...

  • Page 20: Mky02 Operation

    1 to 7. (2) When the MKY02 receives a packet from any one of the ports 1 to 7 (satellite side ports), it corrects the signals constituting the packet into a complete format, and sends the corrected packet to port 0.

  • Page 21: Signal Correction

    The HLS uses a RZ signal format for signals constituting a packet. Even if the signal format of the received packet is transformed up to ±49%, the MKY02, which is a kind of HUB-IC that can be inserted into the HLS network, corrects the packet into a RZ signal format to send it (Fig.

  • Page 22: Features Of Mky02

    (9) Operates on 3.3-V single power supply and available in 0.5 mm pitch, 64 pins, TQFP. The MKY02 can be used as the CUnet family of HUBs by setting the HC pin (pin 50). However, HLS and CUnet networks cannot be connected via the HUB. Note that the MKY02 is not a “bridge”...
  • Page 23 Chapter 1 Concepts for Using MKY02 (HUB) 1 - 15...
  • Page 24 MKY02 User’s Manual (for Hi-speed Link System) 1 - 16...

  • Page 25: Chapter 2 Mky02 Hardware

    Chapter 2 MKY02 Hardware This chapter describes the hardware such as pin assignment, pin functions, and input/out- put circuit type of the MKY02.
  • Page 27 Chapter 2 MKY02 Hardware Chapter 2 MKY02 Hardware This chapter describes the MKY02 hardware, such as pin assignment, pin functions, and I/O circuit type. Figure 2.1 shows the MKY02 pin assignment. 2 - 3...

  • Page 28: Table 2-1 Pin Functions Of Mky02

    TXD17 Positive Connect to input pins of port 1 to 7 drivers. Output pin for cascade connection Connect to the CIE1 pin of the MKY02 for lower cascade connection. COE1 Positive Leave this pin open when it is not cascade-connected.
  • Page 29 Be sure to connect this pin to GND pin (manufacturer test pin). TEST2 Positive Be sure to fix this pin at High (This is input pin to set MKY02 as HLS HUB). Positive Input pin that selects MKY02 communication mode...

  • Page 30: Table 2-2 Electrical Ratings Of Mky02

    MKY02 User’s Manual (for Hi-speed Link System) Table 2-2 and Figure 2.2 shows the electrical ratings of the MKY02 pins. Table 2-2 Electrical Ratings of MKY02 (#: Negative logic) Name Name Name Name RXD1 RXD6 RXD2 RXD7 #RST RXD3 COE1...

  • Page 31: Chapter 3 Single Connection Of Mky02

    Chapter 3 Single Connection of MKY02 This chapter describes the pin functions and how to connect pins required to design a “HUB with two to eight ports configured using one MKY02” inserted into the HLS. 3.1 Voltage Levels of Pins Connecting to Signal Pins .....3-4 3.2 Supplying Driving Clock and Hardware Reset Signal....
  • Page 33 Before connecting the MKY02, be sure to connect the TEST1 pin (pin 46) and TEST2 pin (pin 47) to the GND pins. In a “HUB configured using one MKY02” to be inserted into the HLS, be sure to fix the function select pin (HC: pin 50) at High.

  • Page 34: Voltage Levels Of Pins Connecting To Signal Pins

    A pull-up resistor can also be connected between the 5.0-V power supplies. However, if the input voltage of the MKY02 pins exceed 3.3 V, leakage current flows into the MKY02 pins (Fig. 3.1). (3) Because the High-level voltages does not meet the 5.0-V CMOS input specifications, the MKY02 out- put pins cannot be connected to the CMOS input pins of peripheral logic circuits driven by the 5.0-V...

  • Page 35: Supplying Driving Clock And Hardware Reset Signal

    This section describes how to supply a clock that drives the MKY02 and the hardware reset signal. 3.2.1 Supplying Driving Clock Connect an oscillator-generated 48-MHz clock to the Xi pin (pin 34) of the MKY02 for driving clock. The specifications for supplying an external clock to the Xi pin are as follows: (1) The upper frequency limit is 50 MHz and there is no lower frequency limit.

  • Page 36: Setting Cascade Clock And Baud Rate

    6 MHz 1.5 MHz 750 kHz The configuration to input cascade clocks output from the pins of the MKY02 to the pins of the MKY02 again enables cascade connection of the MKY02 described in “Chapter 4 . To design the “HUB with two to eight ports config- Cascade Connection of MKY02”...

  • Page 37: Hardware Reset

    3.2.3 Hardware Reset When a Low-level signal is input to the #RST (ReSeT) pin (pin 35), the MKY02 is hardware-reset. If a period in which the Low-level signal has been input is less than “one clock of the AX0-pin cascade clock”, the signal is ignored to prevent a malfunction.

  • Page 38: Connecting Network Interface

    This section describes connection of a network interface (“network I/F”). The MKY02 is a HUB IC with eight ports. The MKY02 has one communication mode select pin common to all ports and eight sets of network I/F pins. Port 0 has three network I/F pins: RXD0, TXE0, and TXD0.

  • Page 39: Connection Of Ports 1 To 7

    1 to 7. Connect the output signals of the transmit-enable pins (TXE1 to TXE7) of the MKY02 to the driver-enable input pins of the TRX connected to ports 1 to 7. Connect the receiver out- put signals of the TRX to the input pins (RXD1 to RXD7) of the MKY02 (Fig. 3.7).

  • Page 40: Recommended Network Connection

    MKY02 User’s Manual (for Hi-speed Link System) 3.3.4 Recommended Network Connection Figure 3.9 shows a recommended network connection. The TRX (driver/receiver components) consists of an RS-485 driver/receiver (LSI driven at 5.0 V) and a pulse transformer. Recommended network cables include Ethernet LAN network cables (10BASE-T, Category 3 or higher) and shielded network cables.

  • Page 41: Connecting Monitor Leds

    3.4.1 Packet Receive Monitor The MKY02 has a #LEDRCV pin (pin 44) that outputs a Low level for a given time when any of the eight ports receives a packet. When an LED that goes on at Low level is connected to this #LEDRCV pin, it indi- cates that the HUB of the MKY02 is operating correctly.

  • Page 42: Packet Error Monitor

    3.4.2 Packet Error Monitor The MKY02 has a #LEDRZE pin (pin 45) that outputs a Low level for a given time when any port receives an error packet. When an LED that goes on at Low level is connected to this #LEDRZE pin, it indicates that any port of the MKY02 has received an error packet.

  • Page 43: Port Receive Monitor

    The MKY02 stores the status of the port that has received a packet for a time of “2 ”. The MKY02 outputs the stored status to the RLDT pin as the signal format shown in Figure 3.12 for a next × T time of “2...
  • Page 44 MKY02 User’s Manual (for Hi-speed Link System) The hardware designer of a HUB needs to determine the port receive monitor LEDs for individual ports and the values of current-limiting resistors shown in Figures. 3.13 and 3.14 to meet the output specifications for added latches.

  • Page 45: Handling Cascade Connection Pins

    Chapter 3 Single Connection of MKY02 3.5 Handling Cascade Connection Pins When designing a HUB with two to eight ports configured using one MKY02, be sure to perform the fol- lowing processing so that the cascade pins of the MKY02 do not function (Fig. 3.15).

  • Page 46: Example Circuit For Single Connection Of Mky02

    MKY02 User’s Manual (for Hi-speed Link System) 3.7 Example Circuit for Single Connection of MKY02 Figure 3.16 shows an example circuit for a HUB with eight ports (port 0 of the center side and ports 1 to 7 of the satellite side) in half-duplex mode. In the example circuit, 3, 6, and 12 Mbps can be set by DIP Switch (DIP-SW) and a receive monitor circuit has been added.
  • Page 47 Chapter 3 Single Connection of MKY02 Figure 3.17 shows an example circuit for a HUB with eight ports in full-duplex mode. 3 - 17...
  • Page 48 MKY02 User’s Manual (for Hi-speed Link System) 3 - 18...

  • Page 49: Chapter 4 Cascade Connection Of Mky02

    Chapter 4 Cascade Connection of MKY02 This chapter describes the pin functions and how to connect pins required to design a “multiport HUB (with nine or more ports) (refer to “1.6 Port Addition to HUB” ) config- ured using multiple MKY02s” to be inserted into the HLS.

  • Page 51: Concepts Of Port Addition

    ) increase in subsequent ing of Packets” stacked ports. (2) One satellite side port of the MKY02 cannot be used. The increased time lag in the above (1) may be unuse- ful especially for the HLS used by a user system requiring high real-timeness.

  • Page 52: Port Addition By Cascade Connection

    4.1.2 Port Addition by Cascade Connection The MKY02 has cascade connection pins to solve the problems caused by stacking. If more than one MKY02 is used, the MKY02s can be handled as if they were one HUB-IC by connecting the cascade connection pins (Fig. 4.2).

  • Page 53: Practical Side Of Cascade Connection

    MKY02s are cascade-connected, ports are assigned priorities in descending order. Therefore, num- ber the satellite side ports according to priority (Fig. 4.2). For a center side port, use port 0 of the MKY02 with highest-priority and do not use port 0 of other MKY02 (Fig. 4.2).

  • Page 54: Operation Of Cascade Connection Pins

    The cascade connection pins of the cascade-connected MKY02 operate as follows: (1) The packets which port 0 of the highest-priority MKY02 received are transmitted from ports 1 to 7 and are also transmitted from ports 1 to 7 of another MKY02 via the “priority” cascade connection pins (COE1, COP1, COD1, COHR, CIE1, CIP1, CID1, CIHR) (Fig.

  • Page 55: Connection Of Cascade Clocks And Determination Of Baud Rate

    4.2.3 Connection of Cascade Clocks and Determination of Baud Rate The MKY02 has a circuit which generates a cascade clock. A cascade clock for a baud rate suitable for the settings of the BPS1 and BPS0 pins from the clock to be input to the Xi pin (refer to “3.2.2 Setting Cas-...

  • Page 56: Selecting Communication Mode

    Leave the TXE0 pin (pin 62) and TXD0 pin (pin 63) of any MKY02 other than the highest-priority one open. Fix the RXD0 pin (pin 61) of any MKY02 other than the highest-priority one at a High or Low level. Connect the TRX to each satellite port of multiple MKY02s (refer to “3.3.3 Connection of Ports 1 to 7”...

  • Page 57: Placement Of Monitor Leds

    “3.4.3 Port Receive Monitor” (2) Place the packet error monitor LED as a representative of the port which one MKY02 serves by the number of MKY02 to be used (Fig. 4.9). For details of the packet error monitor, refer to “3.4.2...

  • Page 58: Example Circuit For Port-Added Hub By Cascade Connection

    MKY02 User’s Manual (for Hi-speed Link System) 4.3 Example Circuit for Port-added HUB by Cascade Connection 4 - 10...
  • Page 59 Chapter 4 Cascade Connection of MKY02 Figure 4.10 shows an example circuit for a HUB with 22 ports (port 0 of the center side and ports 1 to 21 of the satellite side) in half-duplex mode. In the example, the baud rates of 12 Mbps, 6 Mbps, and 3 Mbps can be set by DIP-SW and a port receive monitor circuit is added.
  • Page 60 MKY02 User’s Manual (for Hi-speed Link System) 4 - 12...
  • Page 61 Chapter 4 Cascade Connection of MKY02 To design a HUB with 22 ports (port 0 of the center side and ports 1 to 21 of the satellite side) in full-duplex mode, change the connection of the TRX and FH pin (pin 51) in Figure 4.10 to those in Figure 4.11.
  • Page 62 MKY02 User’s Manual (for Hi-speed Link System) 4 - 14...

  • Page 63: Chapter 5 Ratings

    Chapter 5 Ratings This chapter describes the ratings of the MKY02. 5.1 Electrical Ratings ................5-3 5.2 AC Characteristics ................5-3 5.3 Package Dimensions..............5-8 5.4 Recommended Soldering Conditions .........5-9 5.5 Recommended Reflow Conditions ..........5-9...

  • Page 65: Electrical Ratings

    Ci/o Rise/fall time of input signal Rise/fall time of input signal Schmitt trigger input µs 5.2 AC Characteristics Table 5-3 lists the measurement conditions for AC characteristics of the MKY02. Table 5-3 AC Characteristics Measurement Conditions Symbol Name Value Unit...

  • Page 66: Clock And Reset Timing

    MKY02 User’s Manual (for Hi-speed Link System) 5.2.1 Clock and Reset Timing Symbol Name Min. Max. Unit Clock period width Clock High level width Clock Low level width 10 × T Reset enable Low level width BPS1 pin BPS0 pin...

  • Page 67: Port Pin Timing (Txe0 To 7, Txd0, Txd17, Rxd0 To 7)

    Chapter 5 Ratings 5.2.2 Port Pin Timing (TXE0 to 7, TXD0, TXD17, RXD0 to 7) Symbol Short pulse width of sendng signal Unit ±5 Symbol Name Min. Typ. Max. Remarks Period in which TXE -------- 146 × T (146 × T ) + 5 ns -------- TXEH...

  • Page 68: Cascade Connection Pin Timing

    MKY02 User’s Manual (for Hi-speed Link System) 5.2.3 Cascade Connection Pin Timing Symbol Name Min. Typ. Max. 146 × T (146 × T Cascade connection signal 1 -------- ) + 5 ns 142 × T (142 × T Cascade connection signal 2...

  • Page 69: Timing Of Receive Monitor Pin Of Individual Port (Rlld, Rldt, Rlck)

    Chapter 5 Ratings 5.2.5 Timing of Receive Monitor Pin of Individual Port (RLLD, RLDT, RLCK) Symbol Name Min. Typ. Max. Unit Monitor status update interval -1) × T ) × T +1) × T RLLD RLDT output time -1) × T ) ×...

  • Page 70: Package Dimensions

    MKY02 User’s Manual (for Hi-speed Link System) 5.3 Package Dimensions 5 - 8...

  • Page 71: Recommended Soldering Conditions

    Chapter 5 Ratings 5.4 Recommended Soldering Conditions Parameter Symbol Reflow Manual soldering iron Peak temperature (resin surface) 255°C max. 380°C max. Peak temperature holding time 10 s max. 5 s max. (1) Product storage conditions: T = 40°C max., RH = 85% for prevention of moisture absorption (2) Manual soldering: Temperature of the tip of soldering iron 380°C, 5 s max.
  • Page 72 Revision History Version No Date Page Contents 1.5E APR 2009 Deleted description for the patent of WIN Co., LTD. 1.6E JUN 2016 Corrected the maximum value of (period in whichTXE pin goes High) 1.7E JUN 2021 Deleted the needed configuration described in (4). Deleted the "Caution".
  • Page 73 Developed and manufactured by StepTechnica Co., Ltd. 2-32-6, Shimo-fujisawa, Iruma-shi, Saitama 358-0011 TEL: +81-4-2964-8804 https://www.steptechnica.com/ info@steptechnica.com HUB-IC MKY02 User’s Manual (for Hi-speed Link System) Document No.: STD_HLS02_V1.7E Issued: June 2021...

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