# FM33LE025

**FUDAN MICRO** · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-48(7x7)

FM33LE025 from FUDAN MICRO, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | PA14 | bidirectional | GPIO with alternate functions UART0_TX, LPUART0_TX, ADC_IN7 and COMP1_INP4 (comparator positive input). |
| 2 | PA15 | bidirectional | GPIO with alternate functions WKUP0 (external wakeup), SVS (external supply detection) and ADC_IN10. |
| 3 | PA0 | bidirectional | GPIO with alternate functions COM0 (LCD drive) and UART4_RX. |
| 4 | PA1 | bidirectional | GPIO with alternate functions COM1 (LCD drive) and UART4_TX. |
| 5 | PA2 | bidirectional | GPIO with alternate functions COM2 (LCD drive), UART0_RX and LPUART0_RX. |
| 6 | PA3 | bidirectional | GPIO with alternate functions COM3 (LCD drive), UART0_TX and LPUART0_TX. |
| 7 | PA4 | bidirectional | GPIO with alternate functions COM4/SEG28 (LCD drive), GPT1_CH3 and COMP2_INN1 (comparator input). |
| 8 | PA5 | bidirectional | GPIO with alternate functions COM5/SEG29 (LCD drive), GPT1_CH4 and COMP2_INN2 (comparator input). |
| 9 | PA6 | bidirectional | GPIO with alternate functions COM6/SEG30 (LCD drive) and I2CSMB_SCL (I2C_SMBUS clock). |
| 10 | PA7 | bidirectional | GPIO with alternate functions COM7/SEG31 (LCD drive) and I2CSMB_SDA (I2C_SMBUS data). |
| 11 | PA8 | bidirectional | GPIO with alternate functions SEG0 (LCD), LPT32_CH1, COMP2_INP1 and I2CSMB_ALERT (SMBus alert signal). |
| 12 | PA9 | bidirectional | GPIO with alternate functions SEG1 (LCD), LPT32_CH2, COMP2_INP2 and ATIM_CH4. |
| 13 | PA10 | bidirectional | GPIO with alternate functions WKUP1 (external wakeup), SEG2 (LCD), LPT32_ETR, COMP1_INN1 and ATIM_CH3. |
| 14 | PB2 | bidirectional | GPIO with alternate functions WKUP2 (external wakeup), UART4_RX and ATIM_CH1N. |
| 15 | PB3 | bidirectional | Pin PB3 with alternate functions UART4_TX and ATIM_CH2N; the pin table labels its base function as external wakeup instead of GPIO. |
| 16 | PB4 | bidirectional | GPIO with alternate functions SEG3 (LCD) and ATIM_CH1. |
| 17 | PB5 | bidirectional | GPIO with alternate functions SEG4 (LCD) and ATIM_CH2. |
| 18 | PB8 | bidirectional | GPIO with alternate functions SEG7 (LCD), SPI1_SSN and ATIM_CH3N. |
| 19 | PB9 | bidirectional | GPIO with alternate functions SEG8 (LCD), ANATST (analog test), SPI1_SCK and GPT0_ETR. |
| 20 | PB10 | bidirectional | GPIO with alternate functions SEG9 (LCD), SPI1_MISO and GPT0_CH1. |
| 21 | PB11 | bidirectional | GPIO with alternate functions SEG10 (LCD), SPI1_MOSI and GPT0_CH2. |
| 22 | PB12 | bidirectional | GPIO with alternate functions WKUP3 (external wakeup), FOUT1 (clock frequency output) and ATIM_ETR. |
| 23 | PB13 | bidirectional | GPIO with alternate functions SEG11 (LCD), UART1_RX and LPUART1_RX. |
| 24 | PB14 | bidirectional | GPIO with alternate functions SEG12 (LCD), UART1_TX and LPUART1_TX. |
| 25 | PC0 | bidirectional | GPIO with alternate functions I2CSMB_SCL and GPT1_CH1. |
| 26 | PC1 | bidirectional | GPIO with alternate functions I2CSMB_SDA and GPT1_CH2. |
| 27 | PC2 | bidirectional | GPIO with alternate functions XTHIN (high-frequency crystal input), UART1_RX and LPUART1_RX. |
| 28 | PC3 | bidirectional | GPIO with alternate functions XTHOUT (high-frequency crystal output), UART1_TX and LPUART1_TX. |
| 29 | PC4 | bidirectional | GPIO with alternate functions SEG13 (LCD), SCL (I2C clock) and UART5_RX. |
| 30 | PC5 | bidirectional | GPIO with alternate functions SEG14 (LCD), SDA (I2C data) and UART5_TX. |
| 31 | PC6 | bidirectional | GPIO with alternate functions WKUP4 (external wakeup), SEG15 (LCD), GPT1_ETR, I2CSMB_ALERT and ADC_IN11. |
| 32 | PC7 | bidirectional | GPIO with alternate functions SEG16 (LCD), SPI2_SSN and ADC_IN8. |
| 33 | PC8 | bidirectional | GPIO with alternate functions SEG17 (LCD), SPI2_SCK and ADC_IN9. |
| 34 | PC9 | bidirectional | GPIO with alternate functions SEG18 (LCD), SPI2_MISO and ADC_IN0. |
| 35 | PC10 | bidirectional | GPIO with alternate functions WKUP5 (external wakeup), SEG19 (LCD), SPI2_MOSI and ADC_IN1. |
| 36 | PD9 | bidirectional | GPIO with alternate function XT32KO (32768Hz crystal output). |
| 37 | PD10 | bidirectional | GPIO with alternate function XT32KI (32768Hz crystal input). |
| 38 | VDD15 | power_out | LDO output (1.5V core supply); connect a 100nF capacitor to ground. |
| 39 | VSS | power_in | Ground. |
| 40 | VDD | power_in | Power supply, 1.8~5.5V operating range. |
| 41 | PD11 | bidirectional | GPIO with alternate functions WKUP6 (external wakeup), FOUT0 (clock frequency output), ATIM_BRK1 and ADC_IN2. |
| 42 | PD0 | bidirectional | GPIO with alternate functions SEG22 (LCD), UART5_RX and ADC_IN3. |
| 43 | PD1 | bidirectional | GPIO with alternate functions SEG23 (LCD), UART5_TX and ADC_IN4. |
| 44 | PD6 | bidirectional | GPIO with alternate functions WKUP7 (external wakeup), ANATST (analog test) and ATIM_BRK2. |
| 45 | PD7 | bidirectional | GPIO with alternate function SWCLK (SWD interface clock). |
| 46 | PD8 | bidirectional | GPIO with alternate function SWIO (SWD interface data). |
| 47 | NRST | input | Global reset pin; held low for more than 60~90us it triggers a system reset. |
| 48 | PA13 | bidirectional | GPIO with alternate functions UART0_RX, LPUART0_RX, ADC_IN6 and COMP1_INP3 (comparator positive input). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FUDAN MICRO |
| Package | LQFP-48(7x7) |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 48 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage (VDD, VDDA) absolute max | VDD-VSS | -0.3 |  | 6 | V | includes VDD, VDDA | 44 |
| Pin voltage | VPIN |  |  | 6 | V | min VSS-0.3 | 44 |
| VDD-VDDA difference | /ΔVDD/ |  |  | 50 | mV |  | 44 |
| Difference between all ground pins | /ΔVSS/ |  |  | 50 | mV |  | 44 |
| Operating temperature | TA | -40 |  | 85 | ℃ |  | 44 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 44 |
| ESD HBM | HBM | -4000 |  | 4000 | V | TA=25℃, JEDEC JS-001 | 44 |
| ESD CDM | CDM | -1000 |  | 1000 | V | TA=25℃, JEDEC JS-002 | 44 |
| IO Latchup | LU | -200 |  | 200 | mA | -(0.5VDD) < VI < (1.5VDD), TA=25℃, JESD78E | 44 |
| Max current into VDD (source) | ∑IVDD |  |  | 90 | mA |  | 44 |
| Max current out of VSS (sink) | ∑IVSS |  |  | 70 | mA |  | 44 |
| Total IO sink current | ∑IIO |  |  | 70 | mA | all IO sink | 44 |
| Total IO source current | ∑IIO |  |  | 90 | mA | all IO source | 44 |
| AHB clock frequency | fHCLK | 0 |  | 64 | MHz |  | 45 |
| APB clock frequency | fPCLK | 0 |  | 64 | MHz |  | 45 |
| Operating voltage (CPU running), power-up | VDD | 1.8 |  | 5.5 | V | 上电 (power-up) | 45 |
| Operating voltage (CPU running), power-down | VDD | 1.65 |  | 5.5 | V | 下电 (power-down) | 45 |
| Analog operating voltage | VDDA | 1.8 |  | 5.5 | V | must satisfy VREFP=VDD, VREFN=VSS | 45 |
| Junction temperature | TJ | -40 |  | 125 | °C |  | 45 |

## CAD (KiCad official)

- Symbol: `FM33LE025`
- Footprint: `Package_QFP:LQFP-48_7x7mm_P0.5mm`
- 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files: `fm33le025-etched.step` / `fm33le025-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fm33le025.step` / `fm33le025.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [FUDAN MICRO datasheet](docs/fm33le025-datasheet.pdf) (674 pp, sha256 `5813d667fe7dc378`, retrieved 2026-10-23, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/fm33le025-datasheet.pdf)