RELM RMV800, Service Manual, Page: 90 / 140

RMV800 SERVICE MANUAL
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38 P56 NC O NC (left floating)
39 P55 HOLD O NC (left floating)
40 P54 NC O NC (left floating)
41 P53 NC O NC (left floating)
42 P52 RD O Read (for expansion)
43 P51 NC O NC (left floating)
44 P50 WR O Write (for expansion)
45 P47 HNC O Horn alert control On: H
46 P46 SHIFT O Clock frequency shift On: H
47 P45 W/N O W/N switch W: L
48 P44 CS0 O Signal select (expansion chip)
49 A19 A19 O NC
50~59 A18~A9 A18~A9 O FLASHROM address bus
60 VCC VCC I +5V
61 A8 A8 O FLASHROM address bus
62 VSS VSS I GND
63~70 A7~A0 A7~A0 O FLASHROM address bus
71 P17 8RC O 8R power supply control RX: H
72 P16 8TC O 8T power supply control TX: H
73 P15 RX O TX/RX VCO switch RX: L
74 P14 EEPDAT I/O EEPROM data input/output
EEPCLK O EEPROM clock output
75 P13
DACLK O DA clock output
76 P12 PLLUL I PLL unlock detect Unlock: L
77 P11 PLLSTB O PLL strobe output Lock: L
78 P10 AFMUTE O AF Mute (RX) Mute: H
79~86 D7~ D0 D7~ D0 FLASHROM address bus
87 P10 PWR I [PWR] key input On: L
88 P10 IGN I Ignition sense input H: off L: on
PLLDAT O PLL data output
89 P10
DADAT O DA data output
90 P10 PLLCLK O PLL clock output
91 AN3 TEMP I Temperature input
92 AN2 RSSQL I RSSI input
93 AN1 ANLSQL I SQL input (analogue)
94 AVss AVss I GND
95 AN0 TI I CTCSS/CDCSS signal input
96 VREF VREF I Reference voltage input
97 AVCC AVCC I GND
98 P97/Sin4 DTMFPD O DTMF chip power supply control No power: H
99 P96/Sout4 DTMFCLK O DTMF chip decode clock output
100 P95/Clk4 DTMFDAT I DTMF chip decode clock input