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    X0020 SLK

    Uploaded by

    cakristof
    This document provides a schematic diagram for a circuit board. It shows the placement of integrated circuits, connectors, and other electrical components on the board. Power is supplied through connectors J1 and J2 at +5V and ground. Microcontroller U1 is an MC68HC11 connected to peripheral chips through ports A, B, E, and P. Serial communication occurs through MAX232 chip U7 connected to RX, TX, and control lines.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd

    X0020 SLK

    Uploaded by

    cakristof
    35 views1 page
    This document provides a schematic diagram for a circuit board. It shows the placement of integrated circuits, connectors, and other electrical components on the board. Power is supplied through connectors J1 and J2 at +5V and ground. Microcontroller U1 is an MC68HC11 connected to peripheral chips through ports A, B, E, and P. Serial communication occurs through MAX232 chip U7 connected to RX, TX, and control lines.

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    X0020slk

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    This document provides a schematic diagram for a circuit board. It shows the placement of integrated circuits, connectors, and other electrical components on the board. Power is supplied through connectors J1 and J2 at +5V and ground. Microcontroller U1 is an MC68HC11 connected to peripheral chips through ports A, B, E, and P. Serial communication occurs through MAX232 chip U7 connected to RX, TX, and control lines.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    35 views1 page

    X0020 SLK

    Uploaded by

    cakristof
    This document provides a schematic diagram for a circuit board. It shows the placement of integrated circuits, connectors, and other electrical components on the board. Power is supplied through connectors J1 and J2 at +5V and ground. Microcontroller U1 is an MC68HC11 connected to peripheral chips through ports A, B, E, and P. Serial communication occurs through MAX232 chip U7 connected to RX, TX, and control lines.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    GND

    GND

    GND
    +5V

    +5V

    +5V

    1
    PD1
    PD3
    PD5
    J1
    PA1
    PA3
    PA5
    PA7
    PE1
    PE3
    PE5
    PE7

    1
    J5 2
    PD6 3
    GND

    GND
    +5V

    +5V

    C20
    PD0
    PD2

    J7
    PA0
    PA2
    PA4
    PA6
    PE0
    PE2
    PE4

    PE6

    U5 LCD BASE ADDRESS=$B5FC


    C24
    ~ R5 C22 U14 1 J6

    C26
    U13 1
    J2 LVI1 NEW MICROS INC. R6 U6 <
    74HC00

    74HC27

    1 >
    ~ 1
    <
    R7 2
    >
    MM74C923
    VM08

    MAX232
    BR1 GND
    J9 RXD
    U7 C16 F68HC11 C9 C10 TXD
    C14
    GND
    U12 C6
    C11 C12 RST
    74HC00

    U11 U10 C25 GND


    +XR
    LM7805 U1 C15
    75176

    75176
    74HC133

    1 -XR
    R4
    A +X
    Y1 R3
    VR1 B J8 G
    -X
    F
    C1 U8 C17 C8 C7 D2 R2 NC
    NMIX-0020 68HC11 CPU WITH LCD & KEYPAD V1.3 09/29/95
    MEMDIS
    C2 C D R1 E RST
    J11
    E R0 J10 A15
    U2 U3 U4 J A14
    INT
    74HC138

    +5V
    C3 A12 R/W
    H I A7 A13
    NMIX/T-0020 68HC11 W/ KB + LCD

    A6 A8
    Q1
    C4 D A5 A9
    G A4 A11
    U9
    S
    C5 A3 OE
    D1 A2 A10
    A1 AS
    +5V
    A0 D7
    74HC373

    D0 D6
    GND
    D1 D5
    D2 D4
    +VB GND D3
    1

    J3 J4
    N O P
    AJK08 A14 VBB VBB A13 A14 RR/W C19 A14 VBB VBB A13 A14 RR/W
    C18 A14 VBB VBB A13 A14 RR/W

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