Kenwood NX-740H Service Manual page 17

Pin Port Name I/O
No.
39 VDD - 33MD
40 LSDO O Low-Speed Data Output
41 HSDO O High-Speed Data Output
42 3CC O 33C Control
43 5CC O 5C Control
44 SQIN I Squelch Input
45 RSSI I RSSI Input
46 BATT I Battery Voltage
47 CVIN I VCO Lock Voltage
48 BOOT_1 I Test Point to enable Bootloader
49 TEST_1 I/O Test Point 1 for Debug
50 TEST_2 I/O Test Point 2 for Debug
51 VSS - GND
52 VDD - 33MD
53 PLL_DATA O PLL IC Data
54 PLL_LE O PLL IC Enable
55 PLL_CLK O PLL IC Clock
56 PLL_PDN2 O PLL IC Power Down
57 PA O Public Address
58 AMP_SW O AF amplifier
59 9TC O 9T Control
60 BSFT O Beat Shift
61 VSS - GND
62 VDD - 33MD
63 KMO3 O Key Matrix Output 3
64 KMO2 O Key Matrix Output 2
65 KMO1 O Key Matrix Output 1
66 KMI1 I Key Matrix Input 1
67 KMI2 I Key Matrix Input 2
68 KMI3 I Key Matrix Input 3
69 TXD2 O 2nd UART for DE15
70 RXD2 I 2nd UART for DE15
71 VCAP_1 - 2.2uF
72 VDD - 33MD
73 CML_CSN O C-BUS Chip Select
74 CML_SCLK O C-BUS Clock
75 CML_RDATA I C-BUS Reply Data
76 CML_CDATA O C-BUS Command Data
77 EEP_DATAO O EEPROM Data Out
78 EEP_DATAI I EEPRON Data In
79 EEP_SCLK O EEPROM Clock
80 EEP_CS O EEPROM Chip Select
81 EEP_WP O EEPROM Write Protect
82 BUCNT1 O PTT/TXD buffer control
83 VSS - GND
Function Pin Port Name I/O
No.
84 VDD - 33MD
85 MKEYI I DTMF MIC key input
86 BUCNT2 O DTMF MIC buffer control
87 PLL_UL I PLL Unlock Detect
88 SBC O SB Control
89 MKEYO O DTMF MIC Key output
90 9RC O 9R Control
91 PTT I PTT
92 HOOK I Hook
93 ASTSW O Assist Speed-up Switch
94 VSS - GND
95 VDD - 33MD
96 FM_SDATA O FM IC Data In/Out
97 FM_RSTN O FM IC Hardware Reset
98 FM_SCLK O FM IC Clock
99 FM_CSN O FM IC Chip Select
100 FM_PDN O FM IC Power Down
101 TXD O Serial Data to Mic Jack
102 RXD I Serial Data from Mic Jack
103 TXRX O TX / RX Switch
104 HORN O Horn Alert
105 SWDIO I/O SWDIO for SWD
106 VCAP2 - 2.2uF
107 VSS - GND
108 VDD - 33MD
109 SWCLK I/O SWCLK for SWD
110 CML_SSOUT I Audio Codec Chip Select
111 CML_EPSCLK I Audio Codec Clock
112 CML_EPSO O Audio Codec Data Out
113 CML_EPSI I Audio Codec Data In
114 NC I No connection
115 LEDM O LED Dimmer
116 MBL O Panel and Mic Key Backlight
117 FNC_4 (CTS0) I Function P4(CTS)
118 FNC_3(RTS0) O Function P3(RTS)
119 NC I No connection
120 VSS - GND
121 VDD - 33MD
122 33BC O BB IC power supply control
123 MIC1MUTE O Internal Mic Mute
124 MIC2MUTE O External Mic Mute
125 SP_MUTE O Speaker Mute
126 SIM1 I Shimuke port 1
127 SIM2 I Shimuke port 2
128 NC O No connection
Function
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