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FM33LG046

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by adom

FUDAN MICRO Microcontroller Units (MCUs/MPUs/SOCs), LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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FM33LG046

FUDAN MICRO · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-64(10x10)

FM33LG046 from FUDAN MICRO, in a LQFP-64(10x10). 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 NRST input Active-low reset pin with internal digital filtering; hold low for more than 2 ms to ensure a reliable global reset.
2 PA13 bidirectional GPIO with alternate functions UART0_RX, LPUART0_RX and ADC_IN4.
3 PA14 bidirectional GPIO with alternate functions UART0_TX, LPUART0_TX and ADC_IN11.
4 PA15 bidirectional GPIO with alternate functions WKUP0 external wake-up, SVS external supply detection and COMP3_OUT.
5 PA0 bidirectional GPIO with alternate functions COM0 (LCD), UART4_RX, ADC_IN5 and LUT3_OUT.
6 PA1 bidirectional GPIO with alternate functions COM1 (LCD), UART4_TX, ADC_IN12 and LUT2_OUT.
7 PA2 bidirectional GPIO with alternate functions COM2 (LCD), UART0_RX and LPUART0_RX.
8 PA3 bidirectional GPIO with alternate functions COM3 (LCD), UART0_TX and LPUART0_TX.
9 PA4 bidirectional GPIO with alternate functions COM4/SEG28 (LCD), GPT1_CH3 and COMP2_INN1.
10 PA5 bidirectional GPIO with alternate functions COM5/SEG29 (LCD), GPT1_CH4 and COMP2_INN2.
11 PA6 bidirectional GPIO with alternate functions COM6/SEG30 (LCD), OPA1_INN2 and CAN_RX.
12 PA7 bidirectional GPIO with alternate functions COM7/SEG31 (LCD), OPA1_INP2 and CAN_TX.
13 PA8 bidirectional GPIO with alternate functions SEG0 (LCD), LPT32_CH1, SPI1_SSN and COMP2_INP1.
14 PA9 bidirectional GPIO with alternate functions SEG1 (LCD), LPT32_CH2, SPI1_SCK and COMP2_INP2.
15 PA10 bidirectional GPIO with alternate functions WKUP1 wake-up, SEG2 (LCD), LPT32_ETR and COMP1_INN1.
16 PA11 bidirectional GPIO with alternate functions SEG32 (LCD), I2C SCL and LPUART2_RX; high-drive pin (VOL 1.1 V at 20 mA, VDD=5 V).
17 PA12 bidirectional GPIO with alternate functions SEG33 (LCD), I2C SDA and LPUART2_TX; high-drive pin (VOL 1.1 V at 20 mA, VDD=5 V).
18 PB0 bidirectional GPIO with alternate functions SEG34 (LCD), UART3_RX, SPI1_MISO and OPA1_OUT3.
19 PB1 bidirectional GPIO with alternate functions SEG35 (LCD), UART3_TX, SPI1_MOSI and OPA1_OUT4.
20 PB2 bidirectional GPIO with alternate functions WKUP2 wake-up, VCIN1 (LCD capacitor drive), UART4_RX and ATIM_CH1N.
21 PB3 bidirectional GPIO with alternate functions VCIN2 (LCD capacitor drive), UART4_TX and ATIM_CH2N.
22 PB4 bidirectional GPIO with alternate functions SEG3 (LCD), ATIM_CH1, LPUART2_RX and COMP3_INN1.
23 PB5 bidirectional GPIO with alternate functions SEG4 (LCD), ATIM_CH2, LPUART2_TX and COMP3_INN2.
24 PB6 bidirectional GPIO with alternate functions SEG5 (LCD), ATIM_CH3 and SPI2_SSN.
25 PB7 bidirectional GPIO with alternate functions SEG6 (LCD), ATIM_CH4, SPI2_SCK and ANATST (factory test channel).
26 PB8 bidirectional GPIO with alternate functions SEG7 (LCD), SPI0_SSN, ATIM_CH3N and COMP1_INP1.
27 PB9 bidirectional GPIO with alternate functions SEG8 (LCD), COMP1_INP2, SPI0_SCK and GPT0_ETR.
28 PB10 bidirectional GPIO with alternate functions SEG9 (LCD), OPA1_INN1, SPI0_MISO and GPT0_CH1.
29 PB11 bidirectional GPIO with alternate functions SEG10 (LCD), OPA1_INP1, SPI0_MOSI and GPT0_CH2.
30 PB12 bidirectional GPIO with alternate functions WKUP3 wake-up, FOUT1 clock output, ATIM_ETR and OPA1_OUT1.
31 PB13 bidirectional GPIO with alternate functions SEG11 (LCD), UART1_RX and LPUART1_RX.
32 PB14 bidirectional GPIO with alternate functions SEG12 (LCD), UART1_TX and LPUART1_TX.
33 PD12 bidirectional GPIO with alternate functions VDISP1 (LCD external capacitor), I2C SDA and SPI2_MOSI.
34 PC0 bidirectional GPIO with alternate functions VDISP2 (LCD external capacitor), COMP3_INP1, LUT0_OUT and GPT1_CH1.
35 PC1 bidirectional GPIO with alternate functions VDISP3 (LCD external capacitor), COMP3_INP2, LUT1_OUT and GPT1_CH2.
36 PC2 bidirectional GPIO with alternate functions XTHIN (high-frequency crystal input), UART1_RX and LPUART1_RX.
37 PC3 bidirectional GPIO with alternate functions XTHOUT (high-frequency crystal output), UART1_TX and LPUART1_TX.
38 PC4 bidirectional GPIO with alternate functions SEG13 (LCD), OPA1_OUT2, COMP1_OUT and UART5_RX.
39 PC5 bidirectional GPIO with alternate functions SEG14 (LCD), DAC_OUT, COMP2_OUT and UART5_TX.
40 PC6 bidirectional GPIO with alternate functions WKUP4 wake-up, SEG15 (LCD), GPT1_ETR and COMP1_INN2.
41 PC7 bidirectional GPIO with alternate functions SEG16 (LCD), SPI2_SSN and ADC_IN6.
42 PC8 bidirectional GPIO with alternate functions SEG17 (LCD), SPI2_SCK and ADC_IN13.
43 PC9 bidirectional GPIO with alternate functions SEG18 (LCD), SPI2_MISO and ADC_IN14.
44 PC10 bidirectional GPIO with alternate functions WKUP5 wake-up, SEG19 (LCD), SPI2_MOSI and ADC_IN15.
45 PC11 bidirectional GPIO with alternate functions SEG20 (LCD), U7816CLK, GPT0_CH3 and ADC_IN16.
46 PC12 bidirectional GPIO with alternate functions SEG21 (LCD), U7816IO (10K pull-up), GPT0_CH4 and ADC_IN17.
47 PH15 bidirectional Backup-domain GPIO (5V tolerant, internal pull-up) with RTCOUT output and Tamper detection input; max source current 1 mA.
48 XT32KO output 32768 Hz crystal oscillator output.
49 XT32KI input 32768 Hz crystal oscillator input.
50 VDD15 power_out Internal LDO 1.5 V core supply output; connect a 100 nF capacitor to ground (0.1~1 uF).
51 VSS power_in Ground (VSSA).
52 VDD power_in Main power supply (VDDA), 1.65~5.5 V operating range.
53 VREFP passive ADC/DAC reference voltage pin; external reference (1.6 V ≤ VREFP ≤ VDDA) or internal VREFP_VREG output with a 1 uF capacitor.
54 VBAT power_in Backup supply for the RTC domain, 1.5~4.2 V with power switching, or tie to VDD (up to 5.5 V) when not used.
55 PD11 bidirectional GPIO with alternate functions WKUP6 wake-up, FOUT0 clock output, ATIM_BRK1 and ADC_IN0.
56 PD0 bidirectional GPIO with alternate functions SEG22 (LCD), UART5_RX, GPT2_CH1 and ADC_IN7.
57 PD1 bidirectional GPIO with alternate functions SEG23 (LCD), UART5_TX, GPT2_CH2 and ADC_IN1.
58 PD2 bidirectional GPIO with alternate functions SEG24 (LCD), SPI1_SSN, GPT2_CH3 and ADC_IN8.
59 PD3 bidirectional GPIO with alternate functions SEG25 (LCD), SPI1_SCK, GPT2_CH4 and ADC_IN2.
60 PD4 bidirectional GPIO with alternate functions SEG26 (LCD), SPI1_MISO, GPT2_ETR and ADC_IN9.
61 PD5 bidirectional GPIO with alternate functions SEG27 (LCD), SPI1_MOSI, LPT16_ETR and ADC_IN3.
62 PD6 bidirectional GPIO with alternate functions WKUP7 wake-up, ANATST analog test, ATIM_BRK2 and ADC_IN10.
63 PD7 bidirectional GPIO with alternate functions UART3_RX and SWCLK (SWD clock).
64 PD8 bidirectional GPIO with alternate functions UART3_TX and SWIO (SWD data).

Key specifications

Parameter Value
Manufacturer FUDAN MICRO
Package LQFP-64(10x10)
Category Single Chip Microcomputer/Microcontroller
Pins 64

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-VSS (incl. VDD, VDDA) VDD-VSS -0.3 6.5 V 61
Pin voltage VPIN -0.3 6.5 V min printed as VSS-0.3 61
ADC reference voltage VREFP-VREFN -0.3 6.5 V 61
Voltage difference between all ground pins /ΔVSS/ 50 mV 61
Operating temperature TA -40 85 ℃ 61
Storage temperature TSTG -55 150 ℃ 61
ESD HBM, PC5 (DAC_OUT) HBM -2000 2000 V TA=25℃, JEDEC JS-001 61
ESD HBM, all other pins HBM -4000 4000 V TA=25℃, JEDEC JS-001 61
ESD CDM CDM -1000 1000 V TA=25℃, JEDEC JS-002 61
IO latch-up LU -210 210 mA -(0.5VDD) < VI < (1.5VDD), TA=25℃, JESD78E 61
Max current into VDD (source) ∑IVDD 120 mA 61
Max current out of VSS (sink) ∑IVSS 100 mA 61
Total IO sink current ∑IIO 100 mA all IO sink 61
Total IO source current ∑IIO 120 mA all IO source 61
AHB clock frequency fHCLK 0 64 MHz 62
APB clock frequency fPCLK 0 64 MHz 62
Operating voltage range VDD 1.65 5.5 V 62
Backup supply voltage, no power switching VBAT 1.5 5.5 V power switching not used, shorted to VDD 62
Backup supply voltage, with power switching VBAT 1.5 4.2 V power switching used, VBAT supplied separately 62
Junction temperature TJ -40 125 °C 62
Active mode current, 16MHz RCHF IDDRUN 2.32 mA fAHB=16MHz (RCHF), PLL off, Flash 0 wait, TA=25℃, VDD=3.3V 62
Active mode current, 16MHz RCHF IDDRUN 2.31 mA fAHB=16MHz (RCHF), PLL off, Flash 0 wait, TA=85℃ 62
Active mode current, 24MHz RCHF IDDRUN 3.43 mA fAHB=24MHz (RCHF), PLL off, Flash 0 wait, TA=25℃ 62
Active mode current, 24MHz RCHF IDDRUN 3.4 mA fAHB=24MHz (RCHF), PLL off, Flash 0 wait, TA=85℃ 62
Active mode current, 48MHz PLL IDDRUN 6.16 mA fAHB=48MHz, PLL on, Flash 1 wait, TA=25℃ 62
Active mode current, 48MHz PLL IDDRUN 6.15 mA fAHB=48MHz, PLL on, Flash 1 wait, TA=85℃ 62
Active mode current, 614KHz RCLF IDDRUN 150 uA fAHB=614KHz (RCLF), PLL off, Flash 0 wait, TA=25℃ 62

CAD (KiCad official)

  • Symbol: FM33LG046
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: fm33lg046-etched.step / fm33lg046-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fm33lg046.step / fm33lg046.glb are the bare package body.

Provenance

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

  • Datasheet: FUDAN MICRO datasheet (840 pp, sha256 7eb96124383c2857, 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