Icom IC-7410 Service Manual - Page 17

3-4 CPU PORT ALLOCATIONS • MAIN CPU (MAIN UNIT: IC1201) Pin Line No. Name Description I/O 3 VBUS VBUS connection detect for USB HUB. H=USB connection detected. I 8 DAVOX MIC signal detect. H=Input detect. I 9 CTFL CW TX status. I 11 RTKI RTTY keying input. H="Space" input. I 12 UNLK PLL (ADF4630) unlock detect. L=Unlock detected. I 14 VSQM Squelch level input. H=Squelch open. I 16 RTDM RTTY decode data from the DSP. I 19 MHSK0 Handshake signal from the DSP. I 23 FRES Front CPU reset signal. O Optional IF filter (bandwidth=6 kHz) 26 HIFOP1K installation detect. O L=Installed. Optional IF filter (bandwidth=3 kHz) 27 HIFOP2K installation detect. O L=Installed. 31 TRVI Transverter input (from [ACC2]). L=A transverter is connected. I 33 UDTXD Data output port for [USB] connector. O 35 PWRS Transceiver power ON/OFF control. H=Power ON. O 36 UPWS USB HUB power control. H=USB power ON. O 37 H8_ Dual-port SRAM chip select signal. CS6# L=Selected. O 38 H8_ Expander chip select signal. CS7# L=Selected. O 42 PCK PLL serial clock. O 43 PDAT PLL serial data. O 44 PSL PLL strobe. O 45 PST PLL strobe output. O 46 SKYS Straight key/electronic keyer input. (A/D) L=Key down. I 47 EXRL External SEND reray output. H=Relay ON O 48 ESTA External tuner "START" signal output. L=Tuning start. O 49 EKEY External tuner "KEY" signal input. L=While tuning/tune NG. I 51 MCK Common serial clock. O 52 MDAT Common serial data. O 53 TCON External tuner conection detect. I 54 CTXD CI-V (UART) output. O 55 CRXD/ CI-V (UART) input/CI-V bus busy input. CBSY L=Data "1" /Busy. I 56 PCK/ CON0 DDS clock. O 56 DSPCK DSP clock. O 57 DSPR DSP data. O 59 UDRXD USB data input. I 73- 80 H8_D8- H8_D15 DSP address bus. O 82 TND QPSK (L) decode data. I Pin Line No. Name Description I/O 83 NSQ Noise pulse. I 84 PSENI Microphone PTT input. H=While transmitting. I 84 H8_ WAIT# Bus control "Wait" signal. I 85 TRAS SEND signal. O 87 H8_ (Bus control) "L" write signal. LWR# L=While writing. O 88 H8_ (Bus control) "H" write signal. HWR# L=While writing. O 89 H8_RD# (Bus control) Read signal. L=While reading. O 90 H8_AS# (Bus control) Adress strobe. O 92 RES CPU reset. H=Reset. O 94 SENI PTT/ACC SEND signal. H=While transmitting. I 105 DSKY DSP CW/RTTY keying signal. L=Key down/space. O 115 VOXL VOX level input. I 121 DX1 TX/RX DSP data. I 124 THRI Internal tuner through signal. H=Tuner through. I 125 BEEP Beep audio. O 126 STON Side tone. O 133 LTXD Data output (UART) for the communication with the front CPU. O 134 LRXD Data input (UART) for the communication with the front CPU. I 135 PWRK [POWER] input. (Pull-up) I 137 EDT EEPRROM data. I/O 138 ECK EEPRROM clock. O 140 IKEY Internal tuner "KEY" input (UART). L=Tuner ON. I 142 ISTA Internal tuner "START" signal (UART). O • EXPANDER (MAIN UNIT: IC1161) Pin Line No. Name Description I/O 12 FORL Forward wave detect voltage. (A/D) I 1 REFL Reflected wave detect voltage. (A/D) I 14 ALCL ALC meter voltage input. (A/D) I 5 IDL Drive AMP current (ID) detect voltage. (A/D) I 4 VDL Drive AMP voltage (VD). (A/D) I 15 THML Temperature sensing voltage from the thermal sensor on the PA-A UNIT. (A/D) I 3 - 7