•IC Block Diagrams IC301
| PREOR | PRENR | PRER | PREL | PRENL | PREOL | MICL |
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| 21 | 20 19 | 18 17 | 16 | 15 |
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MICR | 22 |
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| RESET | 14 | PDN |
MVDD | 23 |
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MVSS | 24 |
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| CONTROL | 13 | CSN |
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| REGISTER | 12 | CCLK |
MVCM | 25 | VCOM |
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| INTERFACE | 11 | CDTI |
MRF | 26 | MIC POWER |
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| 10 | LRCK | |
MPWR | 27 | SUPPLY |
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| 9 | MCLK |
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| 8 | BCLK |
LIN | 28 |
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| A/D | AUDIO |
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| INTERFACE |
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| CONVERTER |
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| CONTROLLER |
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| VCOM |
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| 1 | 2 | 3 | 4 | 5 | 6 |
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| RIN | VCOM | AVDD | AVSS | DVSS | DVDD |
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C351 |
| CXD9811K |
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| CL CH | VG | NC | OBEEP2 | VSS |
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| OUT2 |
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| 21 20 | 19 | 18 | 17 | 16 |
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| 15 |
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| CHARGE |
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| BEEP |
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| PUMP |
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| AMP |
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| LINE AMP |
| 14 | VDDO2 |
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| LEVEL |
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| PRE |
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| SHIFTER |
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| DRIVER |
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| HEADPHONE AMP |
| 13 | CFB | |
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| REGULATOR | |||
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| 12 | VREF | ||
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| 11 | VCONT |
VSS | 22 |
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| HEADPHONE AMP |
| 10 | VREG |
MCK | 23 |
| LEVEL |
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| PRE |
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| 9 | VREGO | ||
| SHIFTER |
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| DRIVER |
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VDD | 24 |
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| LINE AMP |
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| 8 | VDDO1 | |||
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EN1 | 25 |
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CONTROL LOGIC |
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EN2 | 26 |
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ENREG | 27 |
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| LEVEL | LEVEL | LEVEL | BEEP |
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ENVG | 28 |
| SHIFTER | SHIFTER | SHIFTER | AMP |
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| 3 | 4 | 5 | 6 | 7 |
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| MODEB |
| BEEPIN |
| DIN2 | DIN1 | OBEEP1 | VSS | OUT1 |
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| IC401 | MM1655LCBE |
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| RS | I CTL3 |
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| A/D | GND | I CTL1 | PGND | I SEL AD SEL |
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| 24 | 23 |
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| 22 | 21 | 20 | 19 | 18 17 |
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BAT– | 25 |
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| A/D |
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| CONVERTER |
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RF1 | 26 |
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| 16 |
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| TYPE2 | |
IAMP_CAL | 27 |
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| 15 | CFB |
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AMP_SEL | 28 |
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| + | – |
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| 14 | IAMP_CTL |
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| + – |
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| 13 | A7CAL_SW |
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| + – | VREF |
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I_CTL2 | 29 |
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| VREF |
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CHG_SW1 | 30 |
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BAT+ | 31 |
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| 12 | IN1– |
VO | 32 |
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| 11 | TYPE1 |
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| TIME |
| OSC |
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| 10 | WDT | |
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| DIVIDER |
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| SWITCHING |
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| SWITCHING | DET |
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| COMPARATOR |
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| CHARGE |
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| BLOCK |
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| CONTROL |
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| CONTROL |
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| RECEIVER |
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| ON/OFF |
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| CHARGE CONTROL |
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| ON/OFF |
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| – |
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| ERROR LED | 9 | LED_CTL |
| + |
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| CONTROL | ||
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| VREF |
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| CHARGE SWITCH |
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| 8 | PWR_WAKE | ||||
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| CONTROL |
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| CONTROL | ||||
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| 1 | 2 | 3 | 4 |
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| VI2 | VG | PWT | VI CTL |
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| CHG SW2 |
| VI | CHG CTL |
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36 36