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IC, TMP87PH47U
Pin No. 1 2 3 4 5 Pin Name KY OUT 4 KY OUT 3 KY OUT 2 KY OUT 1 FREQUENCY 1 VOL 1 VOL 1 6 7 8 9 10 11 12 13 14 15 16 17 18 19 VOL 0 KY IN 6 KY IN 5 KY IN 4 KY IN 3 KY IN 2 KY IN 1 TEST RESET XIN XOUT VSS VREF LCD RS COMBO CLK LCD RW 20 COMBO DATA EP DATA 21 22 23 24 25 26 27 28 BAT DET EP CLK LCD DB 4 LCD DB 5 LCD DB 6 LCD DB 7 COMBO STB TX DATA I O I/O I/O I/O I/O O O I/O O I I I I I I I I I O � I O VOL 0 I/O O O O O I/O Keypad column output 4 Keypad column output 3 Keypad column output 2 Keypad column output 1 1 = 25CH, 0 = 10CH 4 (Max.) 1 1 3 1 0 2 0 1 1 (Min.) 0 0 Description
Keypad column input 6 Keypad column input 5 Keypad column input 4 Keypad column input 3 Keypad column input 2 Keypad column input 1 Tied to low Normaly High, low to reset MCU Resonator in (4.0 MHz) Resonator out (4.0 MHz) Ground A/D Reference voltage input (3.0V) LCD Control (Resister select Combo chip CLOCK LCD Control (0 = Write, 1 = Read) Combo chip DATA EEPROM DATA Battery voltage input EEPROM CLOCK LCD DATA 4 LCD DATA 5 LCD DATA 6 LCD DATA 7 Combo chip STB Transmitted DATA Received Signal Strength Indicator 0 = Instruction resister, 1 = Data resister)
29
SIG OUT
I
0 = Carrier present, 1 = Carrier absent 0 = RX unlock, 1 = RX lock 0 = TX unlock, 1 = TX lock
30 31 32 33 34
CHG DET RX DATA TX PWR BPTONE RX PWR
I I O O O
Charger detect 1 = Charging, 0 = Not charging Received DATA TX Power control 0 = ON, 1 = OFF Buzzer signal RX Power control 0 = ON, 1 = OFF
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