Service Manual
Page 27
... is inserted or not, but it doesn't check during established call mode whether SIM card is pressed or not by the Auxiliary ADC, audio, and charger modules. - 26 - 3. In order to SIM card. Key interface Include 5 column, 5 row and additional GPIO 35 for KEY_ROW5.
... is inserted or not, but it doesn't check during established call mode whether SIM card is pressed or not by the Auxiliary ADC, audio, and charger modules. - 26 - 3. In order to SIM card. Key interface Include 5 column, 5 row and additional GPIO 35 for KEY_ROW5.
Service Manual
Page 29
3. TECHNICAL BRIEF 3.6 Analog Main & Power Management Processor (AD6537B, U101) AD6525 or AD6526 BSPORT CSPORT AD6537B Light Controllers Ram GMSK Filter Filter ADC DAC DAC DAC DAC ADC ADC LEDs Othello Crystal & Varactor Tone Filter DAC ASPORT Filter ADC Mic Battery Charger 8 Voltage Regulators Switch Headphones or Headset VCORE: 1.8 V, 80mA VMEM: 1.8 or 2.8V, 150mA VEXT: 2.8V, 170mA VSIM: 1.8 or 2.85V, 20mA VRTC: 1.8V, 200 µA VABB VMIC: 2.5V, 1mA VVCXO: 2.75V, 10mA Figure 3-11 AD6537B FUNCTION BLOCK DIAGRAM - 28 -
3. TECHNICAL BRIEF 3.6 Analog Main & Power Management Processor (AD6537B, U101) AD6525 or AD6526 BSPORT CSPORT AD6537B Light Controllers Ram GMSK Filter Filter ADC DAC DAC DAC DAC ADC ADC LEDs Othello Crystal & Varactor Tone Filter DAC ASPORT Filter ADC Mic Battery Charger 8 Voltage Regulators Switch Headphones or Headset VCORE: 1.8 V, 80mA VMEM: 1.8 or 2.8V, 150mA VEXT: 2.8V, 170mA VSIM: 1.8 or 2.85V, 20mA VRTC: 1.8V, 200 µA VABB VMIC: 2.5V, 1mA VVCXO: 2.75V, 10mA Figure 3-11 AD6537B FUNCTION BLOCK DIAGRAM - 28 -
Service Manual
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... processor. Audio Section • 8 kHz & 16 kHz Voiceband Codec • 48 kHz Monophonic DAC • Power Amplifiers 5. Power Management section • Voltage Regulators • Battery Charger • Battery Protection6. BB Receive section • I -channel & Q-channel Transmit DACs and Filters • Power Ramping DAC 2. Auxiliary section • Voltage Reference • Automatic Frequency...
... processor. Audio Section • 8 kHz & 16 kHz Voiceband Codec • 48 kHz Monophonic DAC • Power Amplifiers 5. Power Management section • Voltage Regulators • Battery Charger • Battery Protection6. BB Receive section • I -channel & Q-channel Transmit DACs and Filters • Power Ramping DAC 2. Auxiliary section • Voltage Reference • Automatic Frequency...
Service Manual
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... AUX ADC and Voltage Reference • IDAC: 10 bits • The Auxiliary ADC provides : -Two differential inputs for temperature sensing. -A differential input for the battery charger current sensor CSFS CSDI CSDO AD6537B Control Serial Port AFC DAC Voltage Reference Aux ADC REFTXCM Light Controllers AFCDAC REFBB REFOUT REFCHG REF TEMP1 TEMP2...
... AUX ADC and Voltage Reference • IDAC: 10 bits • The Auxiliary ADC provides : -Two differential inputs for temperature sensing. -A differential input for the battery charger current sensor CSFS CSDI CSDO AD6537B Control Serial Port AFC DAC Voltage Reference Aux ADC REFTXCM Light Controllers AFCDAC REFBB REFOUT REFCHG REF TEMP1 TEMP2...
Service Manual
Page 36
... -BATTYPE : battery type identification input -REFCHG : voltage reference output 4. TECHNICAL BRIEF 3. Charging Process -Check charger is inserted or not -If AD6537B detects that Charger is inserted, the CC-CV charging starts. -Exception : When battery voltage is lower than 3.2V, the ... RTRIF TEMP2 AGND1 VCHARGER RGATE RSENSE 4-Terminal Battery Pack RTEMP thermistor RTEMP resistor Figure 3-18 AD6537B BATTERY CHARGING BLOCK - 35 - Charger initialization, trickle charging, and Li-Ion charging control are implemented in hardware. 2. Battery -Li-ion battery (Max 4.2V, Nom...
... -BATTYPE : battery type identification input -REFCHG : voltage reference output 4. TECHNICAL BRIEF 3. Charging Process -Check charger is inserted or not -If AD6537B detects that Charger is inserted, the CC-CV charging starts. -Exception : When battery voltage is lower than 3.2V, the ... RTRIF TEMP2 AGND1 VCHARGER RGATE RSENSE 4-Terminal Battery Pack RTEMP thermistor RTEMP resistor Figure 3-18 AD6537B BATTERY CHARGING BLOCK - 35 - Charger initialization, trickle charging, and Li-Ion charging control are implemented in hardware. 2. Battery -Li-ion battery (Max 4.2V, Nom...