SEMICONDUCTOR DATA / COMPONENTS DESCRIPTION
Pin | Pin | I/O | Function |
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No. | Name |
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98 | DCDET | I | DC IN detection interrupt input (↓) | ||
L:DC IN connected | |||||
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99 | RXLED | O | Busy LED output | H:ON | |
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100 | BSFT | O | Beat shift swiching output | H:ON | |
101 | PLLEN | O | Serial enable output to PLL IC |
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102 | PLLLD | I | Lock detection input from PLL IC | H: Lock | |
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103 | KIN0 | I | Key matrix input 0 |
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104 | KIN1 | I | Key matrix input 1 |
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105 | KIN2 | I | Key matrix input 2 |
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106 | KIN3 | I | Key matrix input 3 |
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107 | KIN4 | I | Key matrix input 4 |
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108 | TYPE | I | Market code bit input |
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109 | VUKEY | I | Detection of 4 key or 16 key |
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110 | MICM | O | Microphone mute switch | H:Mute | |
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111 | NOAA | I | 1050Hz tone detection input |
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112 | 5R | O | RX power supply switch | L:ON | |
113 | SHIFT | O | VCO shift switch | L:TX, H:RX | |
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114 | 5T | O | TX power supply switch | L:ON | |
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115 | KOUT0 | O | Key matrix output 0 |
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116 | KOUT1 | O | Key matrix output 1 |
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117 | KOUT2 | O | Key matrix output 2 |
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118 | KOUT3 | O | Key matrix output 3 |
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119 | VSS | - | GND |
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120 | BTDET | O | Battery detection switch | L:ON | |
COMPONENTS DESCRIPTION
TX-RX UNIT (X57-674X-XX)
Ref. No. | Use/Function | Operation/Condition/Compatibility | |
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IC1 | PLL IC |
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IC2 | APC differential |
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amplifier |
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IC3 | FM IC |
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IC4 | 11.5V AVR |
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IC5 | HPF | Active filter | |
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IC6 | AF amplifier |
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IC8 | MPU |
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IC9 | 5.0V AVR |
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IC10 | 4.4V voltage | MPU INT voltage detection | |
| detection |
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IC11 | 3.3V voltage | MPU Reset voltage detection | |
| detection |
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IC12 | 5.0V AVR |
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IC15 | EEPROM |
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IC16 | MIC amplifier | Limiter, splatter filter | |
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IC17 | CTCSS/DCS/WX | Active filter | |
| filter |
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Q1 | VCO |
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Q2 | RF amplifier |
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Q3 | VCO shift | On RX | |
control switch | |||
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Q4 | Ripple filter |
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Q5,6,9 | RF amplifier |
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Q10,11 | Drive amplifier |
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Q12 | Power amplifier |
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Q13 | APC circuit | On TX | |
operation switch | |||
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Q14 | APC output | On TX | |
switch | |||
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Q15 | Q10 operation | On TX | |
| switch |
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Q16 | 1st mixer |
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Q17 | RX 1st amplifier |
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Q20 | Audio mute | Audio mute when off | |
switch | |||
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Q21 | Audio filter | Active filter | |
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Q22 | Wide/narrow | On when wide is selected | |
changeover switch | |||
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Q23 | Tripler | 2nd local | |
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Q24 | IF amplifier | 1st IF 38.85MHz | |
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Q27 | Wide/narrow | On when wide is selected | |
changeover switch | |||
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Q29 | MIC mute | Mutes when ON | |
switch | |||
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Q30 | VOX detection |
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amplifier |
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Q31 | Q56 operation | Off when the speaker outputs audio | |
| switch |
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Q33 | Charge switch |
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