MS51FB9AE-T

@@ -0,0 +1,63 @@+# MS51FB9AE-T++**Nuvoton Tech** · Microcontrollers (MCU/MPU/SOC) · TSSOP-20++MS51FB9AE-T from Nuvoton Tech, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | P0.5/AIN4/T0/IC6/PWM2 | bidirectional | General purpose I/O P0.5. Alternate functions: ADC channel 4 input (AIN4), Timer 0 external count input (T0), PWM Timer 2 input capture (IC6), PWM channel 2 output (PWM2). |+| 2 | P0.6/AIN3/TXD | bidirectional | General purpose I/O P0.6. Alternate functions: ADC channel 3 input (AIN3), UART0 transmit data (TXD). |+| 3 | P0.7/AIN2/RXD | bidirectional | General purpose I/O P0.7. Alternate functions: ADC channel 2 input (AIN2), UART0 receive data (RXD). |+| 4 | P2.0/RST | input | External active-low reset input (RST) / input-only P2.0. Asserting low resets the MCU. |+| 5 | P3.0/AIN1/OSCIN/INT0 | bidirectional | General purpose I/O P3.0. Alternate functions: ADC channel 1 input (AIN1), external oscillator/clock input (OSCIN), external interrupt 0 (INT0). |+| 6 | P1.7/AIN0/INT1 | bidirectional | General purpose I/O P1.7. Alternate functions: ADC channel 0 input (AIN0), external interrupt 1 (INT1). |+| 7 | GND | power_in | Ground reference (0 V) for digital and analog supplies. |+| 8 | P1.6/OCDDA/ICPDA/TXD_1/[SDA] | bidirectional | General purpose I/O P1.6. Alternate functions: On-Chip Debugger data (OCDDA), In-Circuit Programming data (ICPDA), UART1 TXD, and remappable I2C SDA. |+| 9 | VDD | power_in | Positive supply voltage, 2.4 V to 5.5 V. |+| 10 | P1.5/SS/IC7/PWM5 | bidirectional | General purpose I/O P1.5. Alternate functions: SPI slave select (SS), PWM Timer 2 input capture 7 (IC7), PWM channel 5 output (PWM5). |+| 11 | P1.4/PWM1/FB/SDA | bidirectional | General purpose I/O P1.4. Alternate functions: PWM channel 1 output (PWM1), PWM Fault-Brake input (FB), I2C SDA (open-drain). |+| 12 | P1.3/SCL/[STADC] | bidirectional | General purpose I/O P1.3. Alternate functions: I2C SCL (open-drain), remappable ADC start-conversion trigger (STADC). |+| 13 | P1.2/PWM0/IC0 | bidirectional | General purpose I/O P1.2. Alternate functions: PWM channel 0 output (PWM0), PWM Timer 2 input capture 0 (IC0). |+| 14 | P1.1/PWM1/IC1/AIN7/CLO | bidirectional | General purpose I/O P1.1. Alternate functions: PWM channel 1 output (PWM1), input capture 1 (IC1), ADC channel 7 input (AIN7), clock output (CLO). |+| 15 | P1.0/PWM2/IC2/SPCLK | bidirectional | General purpose I/O P1.0. Alternate functions: PWM channel 2 output (PWM2), input capture 2 (IC2), SPI clock (SPCLK). |+| 16 | P0.0/PWM3/IC3/MOSI/T1 | bidirectional | General purpose I/O P0.0. Alternate functions: PWM channel 3 output (PWM3), input capture 3 (IC3), SPI master-out slave-in (MOSI), Timer 1 external count input (T1). |+| 17 | P0.1/PWM4/IC4/MISO | bidirectional | General purpose I/O P0.1. Alternate functions: PWM channel 4 output (PWM4), input capture 4 (IC4), SPI master-in slave-out (MISO). |+| 18 | P0.2/ICPCK/OCDCK/RXD_1/[SCL] | bidirectional | General purpose I/O P0.2. Alternate functions: In-Circuit Programming clock (ICPCK), On-Chip Debugger clock (OCDCK), UART1 receive data (RXD_1), remappable I2C SCL. |+| 19 | P0.3/PWM5/IC5/AIN6 | bidirectional | General purpose I/O P0.3. Alternate functions: PWM channel 5 output (PWM5), input capture 5 (IC5), ADC channel 6 input (AIN6). |+| 20 | P0.4/AIN5/STADC/PWM3/IC3 | bidirectional | General purpose I/O P0.4. Alternate functions: ADC channel 5 input (AIN5), ADC start-conversion trigger (STADC), PWM channel 3 output (PWM3), input capture 3 (IC3). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nuvoton Tech |+| Package | TSSOP-20 |+| Category | MCU |+| Pins | 20 |++## Ordering variants++- `MS51FB9AE-TMS51FB9AE`+- `MS51FB9AE-TMS51XB9AE`+- `MS51FB9AE-TMS51XB9BE`+- `MS51FB9AE-TMS51BA9AE`+- `MS51FB9AE-TMS51DA9AE`++## CAD (KiCad official)++- Symbol: `MS51FB9AE-T`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nuvoton Tech datasheet](docs/ms51fb9ae-t-datasheet.pdf) (25 pp, sha256 `471cbcb0dd4795df`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ms51fb9ae-t-datasheet.pdf)

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