TK-7180H/7182H69Pin No. Name Description5 CLK Serial clock output6 OPT4 Option board I/F 4.Output : L≤0.45V, H≥4.7V/25kΩ load7 USEL UART speed select output. L : 19200bps fixed8 OPT5 Option board I/F 5.Output : L≤0.45V, H≥4.7V/25kΩ load9 DGND Ground10 AGND Ground11 AI Audio input. Zin≥10kΩ, 1Vp-p max,Input Voltage : 0V~5.0V12 AO Audio output. Zo≤10kΩ13 AGND Ground14 5E 5V power supply output. 78mA max15 STON Side tone input. 1kHz, 5Vp-p16 DTI Data signal input.Zin≥22kΩ, 600± 200mVp-p17 TCTL Speaker mute signal input.Input : L≤1.0V, H≥4.0V, Input voltage : 0V~5.0V18 NC No connection19 AUDIH MIC mute signal input20 OPT2 Option board I/F 2.Output : L≤0.45V, H≥4.7V/25kΩ loadInput : L≤1.0V, H≥4.0V, Input voltage : 0V~5.0V21 TXO MIC signal output (AC coupled) before pre-emphasis. Zo>2.2kΩ, 130± 50mVp-p typ.22 RXEO Audio signal output (DC coupled) after de-emphasis. Zo>30kΩ, 1± 0.3Vp-p typ.23 RXEI Audio signal input (DC coupled) after de-emphasis. Zin>15kΩ, 1± 0.3Vp-p typ.24 TXI MIC signal input (AC coupled) before pre-emphasis. Zin>22kΩ, 500± 50mVp-p typ.25 OPT6 Option board I/F 6.Output : L≤0.45V, H≥4.7V/25kΩ load26 8C Power input after power switch.8.0V typ, 100mA maxCN427 (to TX-RX unit A/3 CN701)1 NC No connection2 SB Power output after power switch3 SB Power output after power switch4 SB Power output after power switchPin No. Name Description5 SB Power output after power switch6 SB Power output after power switch7 SB Power output after power switch8 AFO RX filtered audio output9 DI Data signal input10 5C 5V11 GND Ground12 DEO Detected signal output13 MI2 External MIC input14 ME MIC ground15 GND Ground16 RXD1 Serial data input 117 AUXO2 AUX output 218 TXD1 Serial data output 119 AUXO1 AUX output 120 AUXIO9 AUX input/output 921 AUXIO5 AUX input/output 522 AUXIO8 AUX input/output 823 AUXIO4 AUX input/output 424 TXD2 Serial data output 225 AUXIO3 AUX input/output 326 RXD2 Serial data input 227 AUXIO2 AUX input/output 228 AUXIO1 AUX input/output 129 AUXIO7 AUX input/output 730 AUXIO6 AUX input/output 6CN4281 SB Power output of switched power supply2 SPI Speaker output3 SPO Speaker input4 PA Control signal output of PA function5 HOR Control signal output of Horn alert function6 GND GroundCN429 (to Display unit CN902) : TK-7180H1 (DM) Reserve2 GND Ground3 RXD Serial data signal input4 TXD Serial data signal output5 NC No connection6 5C 5V outputTERMINAL FUNCTION