Pin Function Grouping
Started implementing a plan
#Goal
- Group the HX711 part pins from its datasheet by function, ensuring each pin is assigned exclusively to one of the following categories: regulator/power, ground, analog inputs, digital serial interface, clock, or control/reference.
#Implementation plan
1. **Review the HX711 datasheet pin table**
1. Refer to the provided datasheet (https://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/hx711_english.pdf) and verify the pin table details for the 16-pin SOP package.
2. **Define functional groups based on pin functions**
1. Create the following groups:
- **Regulator/Power:** Pins supplying regulated voltages.
- **Ground:** The ground reference pin.
- **Analog Inputs:** Pins associated with analog measurements.
- **Digital Serial Interface:** Pins used for digital serial communication.
- **Clock:** Pins related to crystal clock input or clock generation.
- **Control/Reference:** Pins used for control signals and reference inputs/outputs.
3. **Assign each pin to a single group according to its datasheet function**
1. **Regulator/Power:**
- Pin 1: VSUP (regulator supply 2.7–5.5V)
- Pin 3: AVDD (analog supply 2.6–5.5V)
- Pin 16: DVDD (digital supply)
2. **Ground:**
- Pin 5: AGND (analog ground)
3. **Analog Inputs:**
- Pin 7: INA- (Channel A negative input)
- Pin 8: INA+ (Channel A positive input)
- Pin 9: INB- (Channel B negative input)
- Pin 10: INB+ (Channel B positive input)
4. **Digital Serial Interface:**
- Pin 12: DOUT (serial data output)
5. **Clock:**
- Pin 13: XO (crystal I/O)
- Pin 14: XI (crystal I/O or external clock input)
6. **Control/Reference:**
- Pin 2: BASE (regulator control output)
- Pin 4: VFB (regulator control input)
- Pin 6: VBG (reference bypass output)
- Pin 11: PD_SCK (power-down control and serial clock input)
- Pin 15: RATE (data rate control input)
4. **Audit the grouping for compliance**
1. Verify that all 16 pins are present.
2. Ensure no pin appears in more than one group and every pin is exclusively assigned to its designated function group.
#Success criteria
- All 16 HX711 pins are assigned to one and only one of the groups: regulator/power, ground, analog inputs, digital serial interface, clock, or control/reference.
- The assignment strictly follows the datasheet pin definitions without duplications or omissions.
Task completed.
0:43
Table
| Group | Pins |
|---|---|
| Regulator/Power | Pin 1 VSUP — regulator supply 2.7–5.5V; Pin 3 AVDD — analog supply 2.6–5.5V; Pin 16 DVDD — digital supply 2.6–5.5V |
| Ground | Pin 5 AGND — analog ground |
| Analog Inputs | Pin 7 INA- — Channel A negative input; Pin 8 INA+ — Channel A positive input; Pin 9 INB- — Channel B negative input; Pin 10 INB+ — Channel B positive input |
| Digital Serial Interface | Pin 12 DOUT — serial data output |
| Clock | Pin 13 XO — crystal I/O; Pin 14 XI — crystal I/O or external clock input |
| Control/Reference | Pin 2 BASE — regulator control output; Pin 4 VFB — regulator control input; Pin 6 VBG — reference bypass output; Pin 11 PD_SCK — power-down control and serial clock input; Pin 15 RATE — output data rate control input |
- Total pins assigned: 16 / 16
- Duplicate assignments: none
- Missing pins: none
- All pins are assigned to exactly one group.
Table
| Pin | Name | Assigned Group |
|---|---|---|
| 1 | VSUP | Regulator/Power |
| 2 | BASE | Control/Reference |
| 3 | AVDD | Regulator/Power |
| 4 | VFB | Control/Reference |
| 5 | AGND | Ground |
| 6 | VBG | Control/Reference |
| 7 | INA- | Analog Inputs |
| 8 | INA+ | Analog Inputs |
| 9 | INB- | Analog Inputs |
| 10 | INB+ | Analog Inputs |
| 11 | PD_SCK | Control/Reference |
| 12 | DOUT | Digital Serial Interface |
| 13 | XO | Clock |
| 14 | XI | Clock |
| 15 | RATE | Control/Reference |
| 16 | DVDD | Regulator/Power |
Exclusive Functional Grouping
Audit
Sorted Pin Audit