Information about http://www.electronics-lab.com/projects/telephone/019/CPU_Unit.pdf

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Language: middle_frisian
Created: Sat Apr 12 15:55:22 2008
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                                                                                                                                                              LS1
D                                                                                         J5                                                                                                                             D
                                                                                                                                                                    4
                                                                                                                                                                                                           J6
                                                                                                 1                                                      3
                                                                                                                                                                    5                                1
        SD = Status Detecting                                                                                                                                       8
                                                                                         TN_SLIC_1                                                      6
        TN = Telephone Network                                                                                                                                      7                                      TN_SLIC_2
                                                                                                                                                        1
        RG = Ringing Generator                                                                                                                          2
                                                                                          J2
        SLIC = Subscriber Line Interface Circuit                                                                                                         12 V RELAY
                                                                                                 1                                                                                                  R8

        A firmware is needed for the PIC                                                                                D8
                                                                                          12V                                                                                                       4.7K
                                                                                                                                                                                    C1
                                                                                                                        1N4007
                                                                                                          R1
C                                                                                         D4                                         Q1                                                                                  C
                                                                                                                                     C945                                         4.7 uf
                                                                                                          10K                                                             R7
        J3                                                                         R2     LED                                                                                                  Q2
                  1                                       U1                       330                                                                                                         C945
                                                                                                                  D9                                     J7               10K
                                                     17                            6                          1N4148                                1
        SD_SLIC_1                                         RA0         RB0/INT
                                                     18   RA1            RB1       7
                                                      1                            8                                              C4
                                                          RA2            RB2                                                                             RG_SLIC_2                             R6
                                                      2   RA3            RB3       9
                                                      3                            10                                             4.7 uf                                                       4.7K
                                                          RA4/TOCKI      RB4                    R10      R9                                                                                                     C2
                                                                         RB5       11
        J4                                                                                      4.7K   4.7K
                                                     16   OSC1/CLKIN     RB6       12
                  1              X1                  15                            13
                                           R3             OSC2/CLKOUT    RB7
                               4MHz




                                           10M       4                                                                                                                                                     4.7 uf
        SD_SLIC_2                                         MCLR                                                                                                              R5
                                                                 GND




                               C4                    14                                                                                                                                                    Q3
B
                               22     C3                  VDD                                                 D10                                   J8                                                     C945          B
                                      22                                                                                                       1                            10K
                                                                       PIC16F84A
                                                                 5




                                                                                                              1N4148                                RG_SLIC_1
                                                                                                                                       C5
             J9                                                                                                                            4.7 uf
                      1


             Ground                                                                                                                                         0
                                           R4
             J1                            10K
                      1

A                                                                                                                                          Designed by Achira - vdslnet@gmail.com                                        A
             5V ( Regulated)
                                                                                                                Title
                                                                                                                    CPU Unit for two way T.P. exchange                             Achira / OrCad 9.2
                                                                                                                Size         Document Number                                                                     Rev
                                                                                                                   A         1.00                                                                                  1.0

                                                                                                                Date:            Saturday, April 12, 2008               Sheet       1          of          1
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