Sharp GX15, Service Manual

Page: 90 / 122

GX15
6 – 2
CONFIDENTIAL
IC102 VHIQ5RW45BF-1L (Q5RW45B): 4.5 V REGULATOR
IC103 (AD6537B): ANALOGUE BASEBAND
Pin No. Terminal name Input/Output Description of terminal
1 GND – Earth
2 VDD – Power supply
3 VOUT Output Output
4 CE Input Chip enable
Pin No. Terminal name Input/Output Description of terminal
1* TDI Input Not used
2 VCXOEN Input VCXO supply
3 VBAT3 Input External interface regulator input
4 VEXT Output External interface supply
5 VCHG Input Charge supply
6 GATEDRIVE Output Charge DAC (FET) output control
7 ISENSE Input Charge current sense input
8* TEMP2 Input Not used
9 AUXADC2 Input Auxiliary ADC input for hands free kit (earphone) detection
10 REFBB Output Baseband transmit & receive voltage reference
11 AGND2 – Analogue baseband earth
12 IP Input/Output I-channel positive input/output
13 IN Input/Output I-channel negative input/output
14 QN Input/Output Q-channel positive input/output
15 QP Input/Output Q-channel negative input/output
16* NC_A16 – Not used
17* TMS Input Not used
18* TCK Input Not used
19 VBAT3 Input External interface regulator input
20 VEXT Output External interface supply
21* NC_B05 – Not used
22 BATTYPE Input Battery type identification input
23* NC_B07 – Not used
24 VBATSENSE Input Battery voltage sense input
25 TEMP1 Input Temperature sensor input
26 AUXADC1 Input Auxiliary ADC input for temp. sensor adjustment
27 REFOUT Output Voltage reference output
28 PA Output Power amplifier control output
29 AGND0 – Analogue earth
30 AFCDAC Output Automatic frequency control DAC output
31 REF Output Voltage reference
32 AGND1 – Analogue earth for voltage reference
33* TDO Output Not used
34* GPI Input Not used (Pull down)
35 VBAT1 Input Voltage controlled crystal oscillator regulator input
36* NC_C16 – Not used
37 INT Output Digital BB interrupt
38 ASDO Output Audio serial port data output
39 REFCHG Output Voltage reference output
+
-
3
1
2
4
VDD
CE GND
VOUT
VREF
CURRENT LIMIT