✦Schematic Diagram✦
✦Circuit Diagram✦
✦Datasheet✦
✦Pinout✦
✦Pin Name✦
✦Explanation✦
✦Pin Full Form✦
✦Pin Working Function✦
Pin Name | Full Form | Description | Explanation
Pin No 1: DACVSS
Full-Form: Digital-to-Analog Converter (DAC) Voltage Supply Source (Ground)
Explanation: DACVSS is the ground connection for the DAC section of the IC. Ground is a reference point in the circuit that is usually at 0V potential. The DAC converts digital signals into analogue voltages or currents. Having a dedicated ground ensures that the DAC operates without interference from other parts of the circuit, which is crucial for maintaining the accuracy and stability of the analogue signals it generates.
Pin No 2: PB11/SD_PWR
Full-Form: Port B, Pin 11 / Secure Digital (SD) Power
Explanation: PB11 refers to the 11th pin on Port B, a general-purpose I/O (GPIO) port. SD_PWR indicates that this pin can also be used to control power to an SD card interface. The dual function suggests that this pin can be configured either for GPIO operations or to manage power to an SD card, depending on the specific needs of the application.
Pin No 3: PB10/SD0CMDB/AUX2R/ADC9
Full-Form: Port B, Pin 10 / Secure Digital Card 0 Command B / Auxiliary 2 Right / Analog-to-Digital Converter Channel 9
Explanation: PB10 serves as a multi-functional pin. It can be used as:
SD0CMDB: The command line for the first SD card interface.
AUX2R: The right channel of the second auxiliary input.
ADC9: The 9th channel of the Analog-to-Digital Converter (ADC). The flexibility of this pin allows it to be used for various functions depending on the circuit design.
Pin No 4: PB9/SD0CLKB/AUX2L
Full-Form: Port B, Pin 9 / Secure Digital Card 0 Clock B / Auxiliary 2 Left
Explanation: Similar to Pin 3, PB9 is a multi-functional pin. It can act as:
SD0CLKB: The clock signal line for the first SD card interface.
AUX2L: The left channel of the second auxiliary input. The clock signal is crucial for synchronizing data transfer, and the auxiliary channels are typically used for audio input.
Pin No 5: PB8/SD0DATB/AUX1R/ADC8
Full-Form: Port B, Pin 8 / Secure Digital Card 0 Data B / Auxiliary 1 Right / Analog-to-Digital Converter Channel 8
Explanation: PB8 offers the following functionalities:
SD0DATB: Data line for the first SD card interface.
AUX1R: The right channel of the first auxiliary input.
ADC8: The 8th channel of the ADC. This pin can be used for data transmission, audio input, or analog-to-digital conversion, providing versatility in circuit design.
Pin No 6: VBAT
Full-Form: Battery Voltage
Explanation: VBAT is the pin where the battery voltage is connected. This is often used in portable devices that require an independent power source. The IC can draw power from this pin when other power sources are not available or maintain certain functionalities like a real-time clock (RTC) when the main power is off.
Pin No 7: PGND
Full-Form: Power Ground
Explanation: PGND is the ground connection specifically for the power section of the IC. This is separate from the digital or analogue ground to reduce noise and ensure that the power circuitry has a clean reference ground, which is vital for stable operation.
Pin No 8: NC
Full-Form: No Connection
Explanation: NC indicates that this pin is not internally connected to any circuitry within the IC. It may be used for physical stability in packaging or reserved for future functionalities.
Pin No 9: LDO_IN/PB5
Full-Form: Low Dropout Regulator Input / Port B, Pin 5
Explanation: This pin can serve as:
LDO_IN: The input for a Low Dropout Regulator (LDO), which provides a stable output voltage even when the input voltage is close to the output voltage.
PB5: A general-purpose I/O pin on Port B. The LDO functionality allows the IC to regulate power more efficiently, while the GPIO option offers additional flexibility.
Pin No 10: BT_AVDD
Full-Form: Bluetooth Analog Voltage Supply
Explanation: BT_AVDD provides the analogue supply voltage for the Bluetooth section of the IC. This dedicated power supply ensures that the analogue components of the Bluetooth module operate correctly without interference from digital noise.
Pin No 11: ADDIO
Full-Form: Addressable Input/Output
Explanation: ADDIO is a pin that can be used for addressable I/O functions, allowing the IC to communicate with other devices or peripherals that require addressable I/O lines.
Pin No 12: PB3/ADC6
Full-Form: Port B, Pin 3 / Analog-to-Digital Converter Channel 6
Explanation: PB3 can function as:
PB3: A general-purpose I/O pin on Port B.
ADC6: The 6th channel of the ADC. This pin can be used for either digital input/output operations or converting an analogue signal to a digital form.
Pin No 13: PB1/ADC5
Full-Form: Port B, Pin 1 / Analog-to-Digital Converter Channel 5
Explanation: Similar to PB3/ADC6, this pin offers:
PB1: General-purpose I/O on Port B.
ADC5: The 5th channel of the ADC. This pin provides options for digital control or analogue signal processing.
Pin No 14: PB0
Full-Form: Port B, Pin 0
Explanation: PB0 is a general-purpose I/O pin on Port B. It can be used for digital input/output operations, serving various purposes in the circuit.
Pin No 15: NC
Full-Form: No Connection
Explanation: Like Pin 8, this pin is not connected internally and serves no functional purpose in the circuit.
Pin No 16: BT_RF
Full-Form: Bluetooth Radio Frequency
Explanation: BT_RF is used for the radio frequency signal in the Bluetooth module. This pin is critical for wireless communication, allowing the IC to transmit and receive Bluetooth signals.
Pin No 17: VSSIO
Full-Form: Voltage Supply Source Input/Output Ground
Explanation: VSSIO is the ground connection for the input/output section of the IC. This pin provides a reference point for I/O operations, ensuring stable and noise-free digital communication.
Pin No 18: BT_OSCI
Full-Form: Bluetooth Oscillator Input
Explanation: BT_OSCI is the input pin for the oscillator that drives the Bluetooth module's clock. The oscillator is crucial for timing and synchronization in wireless communication.
Pin No 19: BT_OSCO
Full-Form: Bluetooth Oscillator Output
Explanation: BT_OSCO is the output pin for the oscillator that drives the Bluetooth module's clock. This pin works in conjunction with BT_OSCI to ensure the Bluetooth module operates at the correct frequency.
Pin No 20: ADC13/SD1CLK/PC5
Full-Form: Analog-to-Digital Converter Channel 13 / Secure Digital Card 1 Clock / Port C, Pin 5
Explanation: This pin offers multiple functionalities:
ADC13: The 13th channel of the ADC.
SD1CLK: The clock line for the second SD card interface.
PC5: A general-purpose I/O pin on Port C. This pin can be used for analog-to-digital conversion, clock synchronization for SD cards, or general I/O tasks.
Pin No 21: ADC10/SD1CMD/PC5
Full-Form: Analog-to-Digital Converter Channel 10 / Secure Digital Card 1 Command / Port C, Pin 5
Explanation: This pin is similar to Pin 20, with the following functionalities:
ADC10: The 10th channel of the ADC.
SD1CMD: The command line for the second SD card interface.
PC5: A general-purpose I/O pin on Port C. The command line is used to control data flow in SD card operations.
Pin No 22: DVDD
Full-Form: Digital Voltage Supply
Explanation: DVDD is the power supply pin for the digital section of the IC. This pin provides the necessary voltage for digital circuits within the IC, ensuring proper operation of digital functions.
Pin No 23: USBDM
Full-Form: USB Data Minus
Explanation: USBDM is the data line for USB communication, carrying the differential signal (negative) used in USB data transfer. This pin is essential for USB connectivity, allowing the IC to interface with USB devices.
Pin No 24: ADC12/USBDP
Full-Form: Analog-to-Digital Converter Channel 12 / USB Data Plus
Explanation: This pin can function as:
ADC12: The 12th channel of the ADC.
USBDP: The data line for USB communication, carrying the differential signal (positive). This pin plays a dual role in both analogue signal processing and digital USB communication.
Pin No 25: ADC2/PA6
Full-Form: Analog-to-Digital Converter Channel 2 / Port A, Pin 6
Explanation: This pin offers:
ADC2: The 2nd channel of the ADC.
PA6: A general-purpose I/O pin on Port A. The pin can be used for converting analogue signals to digital or for general digital I/O operations.
Pin No 26: ADC1/PA5
Full-Form: Analog-to-Digital Converter Channel 1 / Port A, Pin 5
Explanation: Similar to Pin 25, this pin can function as:
ADC1: The 1st channel of the ADC.
PA5: A general-purpose I/O pin on Port A. It can be used for both analogue and digital purposes, depending on the circuit design.
Pin No 27: ADC0/AUX0R/MIC/PA1/PC6
Full-Form: Analog-to-Digital Converter Channel 0 / Auxiliary 0 Right / Microphone Input / Port A, Pin 1 / Port C, Pin 6
Explanation: This multi-functional pin can serve as:
ADC0: The 0th channel of the ADC.
AUX0R: The right channel of the first auxiliary input.
MIC: Microphone input.
PA1: A general-purpose I/O pin on Port A.
PC6: A general-purpose I/O pin on Port C. The pin's flexibility makes it suitable for audio input, analog-to-digital conversion, or digital I/O tasks.
Pin No 28: DACR
Full-Form: Digital-to-Analog Converter Right
Explanation: DACR is the output pin for the right channel of the Digital-to-Analog Converter. This pin outputs analogue signals converted from digital data, typically used in audio applications.
Pin No 29: DACL
Full-Form: Digital-to-Analog Converter Left
Explanation: DACL is the output pin for the left channel of the Digital-to-Analog Converter. Similar to DACR, it outputs analogue signals converted from digital data, used in stereo audio applications.
Pin No 30: VCOMO
Full-Form: Common Voltage Output
Explanation: VCOMO is the output pin for the common voltage, typically used as a reference voltage for other parts of the circuit. It helps stabilize the operation of the IC by providing a consistent reference voltage.
Pin No 31: DACVDD
Full-Form: Digital-to-Analog Converter Voltage Supply
Explanation: DACVDD is the power supply pin for the DAC section of the IC. This pin provides the necessary voltage for the DAC to operate correctly, ensuring the accurate conversion of digital signals to analogue.
Pin No 32: NC
Full-Form: No Connection
Explanation: As with the other NC pins, this pin is not connected internally and serves no functional purpose in the circuit.
