STC8A8K64D4-45I-LQFP48

@@ -0,0 +1,95 @@+# STC8A8K64D4-45I-LQFP48++**STC Micro** · Microcontrollers (MCU/MPU/SOC) · LQFP-48(7x7)++STC8A8K64D4-45I-LQFP48 from STC Micro, in a LQFP-48(7x7). 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 | P5.2/RxD4_2 | bidirectional | General-purpose I/O P5.2. Alternate: UART4 receive (RxD4_2). |+| 2 | P5.3/TxD4_2 | bidirectional | General-purpose I/O P5.3. Alternate: UART4 transmit (TxD4_2). |+| 3 | P1.1/ADC1/PWM1_2/TxD2 | bidirectional | General-purpose I/O P1.1. Alternates: 12-bit ADC channel 1, enhanced PWM channel 1 output (PWM1_2), UART2 transmit (TxD2). |+| 4 | P1.2/ADC2/PWM2_2/SS/T2/ECI/ADC_ETR | bidirectional | General-purpose I/O P1.2. Alternates: ADC channel 2, PWM2 output, SPI slave-select, Timer 2 external clock input, PCA external pulse input (ECI), ADC external trigger (ADC_ETR). |+| 5 | P1.3/ADC3/PWM3_2/MOSI/T2CLKO | bidirectional | General-purpose I/O P1.3. Alternates: ADC channel 3, PWM3 output, SPI MOSI, Timer 2 divided-clock output (T2CLKO). |+| 6 | P1.4/ADC4/PWM4_2/MISO/SDA/CCP3 | bidirectional | General-purpose I/O P1.4. Alternates: ADC channel 4, PWM4 output, SPI MISO, I2C SDA (default mapping), PCA CCP3 capture/compare. |+| 7 | P4.4/RD/TxD_4 | bidirectional | General-purpose I/O P4.4. Alternates: external-bus read strobe (RD), UART1 transmit alt-4 (TxD_4). |+| 8 | P1.5/ADC5/PWM5_2/SCLK/SCL/CCP2 | bidirectional | General-purpose I/O P1.5. Alternates: ADC channel 5, PWM5 output, SPI SCLK, I2C SCL (default mapping), PCA CCP2 capture/compare. |+| 9 | P1.6/ADC6/RxD_3/PWM6_2/MCLKO_2/CCP1/XTALO | bidirectional | General-purpose I/O P1.6. Alternates: ADC channel 6, UART1 receive alt-3 (RxD_3), PWM6 output, master clock divided output (MCLKO_2), PCA CCP1, external crystal output (XTALO). |+| 10 | P1.7/ADC7/TxD_3/PWM7_2/CCP0/XTALI | bidirectional | General-purpose I/O P1.7. Alternates: ADC channel 7, UART1 transmit alt-3 (TxD_3), PWM7 output, PCA CCP0, external crystal / external clock input (XTALI). |+| 11 | ADC_AGnd | power_in | ADC analog ground reference. Tie to system GND via a clean analog return. |+| 12 | ADC_VRef+ | power_in | ADC positive voltage reference input. External reference required in range 2.4 V to MCU-VCC. |+| 13 | ADC_AVcc | power_in | ADC analog supply. Connect to MCU VCC via ferrite/RC filter for best analog performance. |+| 14 | P5.4/NRST/MCLKO | bidirectional | General-purpose I/O P5.4. Alternates: active-low external reset (NRST), master clock divided output (MCLKO). Function selected in RSTCFG / on-chip option bytes. |+| 15 | Vcc | power_in | Main digital supply pin. Operating range per datasheet (typ 2.5 V - 5.5 V for -45I grade). Decouple with 10 uF bulk + 0.1 uF ceramic close to the pin. |+| 16 | P5.5 | bidirectional | General-purpose I/O P5.5. No alternate function on this variant. |+| 17 | Gnd | power_in | Digital ground return pin. |+| 18 | P4.0/WR_3/RxD2_2 | bidirectional | General-purpose I/O P4.0. Alternates: external-bus write strobe alt-3 (WR_3), UART2 receive alt-2 (RxD2_2). |+| 19 | P3.0/RxD/CCP3_4/INT4 | bidirectional | General-purpose I/O P3.0. Alternates: UART1 receive (RxD, default mapping), PCA CCP3 alt-4, external interrupt 4 (INT4). |+| 20 | P3.1/TxD/CCP2_4 | bidirectional | General-purpose I/O P3.1. Alternates: UART1 transmit (TxD, default mapping), PCA CCP2 alt-4. |+| 21 | P3.2/INT0/CCP1_4/SCLK_4/SCL_4 | bidirectional | General-purpose I/O P3.2. Alternates: external interrupt 0 (INT0), PCA CCP1 alt-4, SPI SCLK alt-4, I2C SCL alt-4. |+| 22 | P3.3/INT1/CCP0_4/MISO_4/SDA_4 | bidirectional | General-purpose I/O P3.3. Alternates: external interrupt 1 (INT1), PCA CCP0 alt-4, SPI MISO alt-4, I2C SDA alt-4. |+| 23 | P3.4/T0/T1CLKO/MOSI_4/CMPO | bidirectional | General-purpose I/O P3.4. Alternates: Timer 0 external clock in (T0), Timer 1 divided-clock output (T1CLKO), SPI MOSI alt-4, comparator output (CMPO). |+| 24 | P3.5/T1/T0CLKO/ECI_4/SS_4/PWMFLT | bidirectional | General-purpose I/O P3.5. Alternates: Timer 1 external clock in (T1), Timer 0 divided-clock output (T0CLKO), PCA ECI alt-4, SPI SS alt-4, PWM fault-detect input (PWMFLT). |+| 25 | P5.0/RxD3_2/CMP+_2 | bidirectional | General-purpose I/O P5.0. Alternates: UART3 receive alt-2 (RxD3_2), analog comparator positive input CMP+_2. |+| 26 | P5.1/TxD3_2/CMP+_3 | bidirectional | General-purpose I/O P5.1. Alternates: UART3 transmit alt-2 (TxD3_2), analog comparator positive input CMP+_3. |+| 27 | P3.6/INT2/WR_2/RxD_2/CMP- | bidirectional | General-purpose I/O P3.6. Alternates: external interrupt 2 (INT2), external-bus write strobe alt-2 (WR_2), UART1 receive alt-2 (RxD_2), analog comparator negative input (CMP-). |+| 28 | P3.7/INT3/RD_2/TxD_2/CMP+ | bidirectional | General-purpose I/O P3.7. Alternates: external interrupt 3 (INT3), external-bus read strobe alt-2 (RD_2), UART1 transmit alt-2 (TxD_2), comparator positive input (CMP+). |+| 29 | P4.1/ALE/CMPO_2 | bidirectional | General-purpose I/O P4.1. Alternates: external-bus address-latch enable (ALE), comparator output alt-2 (CMPO_2). |+| 30 | P2.0/A8/PWM0 | bidirectional | General-purpose I/O P2.0. Alternates: external-bus address line A8, enhanced PWM channel 0 output (PWM0). |+| 31 | P4.2/RD_3/TxD2_2 | bidirectional | General-purpose I/O P4.2. Alternates: external-bus read strobe alt-3 (RD_3), UART2 transmit alt-2 (TxD2_2). |+| 32 | P2.1/A9/PWM1 | bidirectional | General-purpose I/O P2.1. Alternates: address line A9, PWM1 output. |+| 33 | P2.2/A10/PWM2/SS_2/ECI_2 | bidirectional | General-purpose I/O P2.2. Alternates: address line A10, PWM2 output, SPI slave-select alt-2 (SS_2), PCA ECI alt-2. |+| 34 | P2.3/A11/PWM3/MOSI_2/CCP0_2 | bidirectional | General-purpose I/O P2.3. Alternates: address line A11, PWM3 output, SPI MOSI alt-2, PCA CCP0 alt-2. |+| 35 | P2.4/A12/PWM4/MISO_2/SDA_2/CCP1_2 | bidirectional | General-purpose I/O P2.4. Alternates: address line A12, PWM4 output, SPI MISO alt-2, I2C SDA alt-2, PCA CCP1 alt-2. |+| 36 | P2.5/A13/PWM5/SCLK_2/SCL_2/CCP2_2 | bidirectional | General-purpose I/O P2.5. Alternates: address line A13, PWM5 output, SPI SCLK alt-2, I2C SCL alt-2, PCA CCP2 alt-2. |+| 37 | P2.6/A14/PWM6/CCP3_2 | bidirectional | General-purpose I/O P2.6. Alternates: address line A14, PWM6 output, PCA CCP3 alt-2. |+| 38 | P2.7/A15/PWM7 | bidirectional | General-purpose I/O P2.7. Alternates: address line A15, PWM7 output. |+| 39 | P0.0/AD0/ADC8/RxD3 | bidirectional | General-purpose I/O P0.0. Alternates: external-bus address/data line AD0, ADC channel 8, UART3 receive (RxD3). |+| 40 | P0.1/AD1/ADC9/TxD3 | bidirectional | General-purpose I/O P0.1. Alternates: AD1, ADC channel 9, UART3 transmit (TxD3). |+| 41 | P0.2/AD2/ADC10/RxD4 | bidirectional | General-purpose I/O P0.2. Alternates: AD2, ADC channel 10, UART4 receive (RxD4). |+| 42 | P4.3/WR/RxD_4 | bidirectional | General-purpose I/O P4.3. Alternates: external-bus write strobe (WR, default), UART1 receive alt-4 (RxD_4). |+| 43 | P0.3/AD3/ADC11/TxD4 | bidirectional | General-purpose I/O P0.3. Alternates: AD3, ADC channel 11, UART4 transmit (TxD4). |+| 44 | P0.4/AD4/ADC12/T3 | bidirectional | General-purpose I/O P0.4. Alternates: AD4, ADC channel 12, Timer 3 external clock input (T3). |+| 45 | P0.5/AD5/ADC13/T3CLKO | bidirectional | General-purpose I/O P0.5. Alternates: AD5, ADC channel 13, Timer 3 divided-clock output (T3CLKO). |+| 46 | P0.6/AD6/ADC14/T4 | bidirectional | General-purpose I/O P0.6. Alternates: AD6, ADC channel 14, Timer 4 external clock input (T4). |+| 47 | P0.7/AD7/T4CLKO | bidirectional | General-purpose I/O P0.7. Alternates: AD7, Timer 4 divided-clock output (T4CLKO). (No ADC channel on this variant.) |+| 48 | P1.0/ADC0/PWM0_2/RxD2 | bidirectional | General-purpose I/O P1.0. Alternates: ADC channel 0, PWM0 output, UART2 receive (RxD2). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STC Micro |+| Package | LQFP-48(7x7) |+| Category | MCU |+| Pins | 48 |++## Ordering variants++Same part, different packaging or reel option.++- `STC8A8K64D4-45I-LQFP48`+- `STC8A8K64D4-45I-QFN48`+- `STC8A8K64D4-45I-LQFP64`+- `STC8A8K64D4-45I-QFN64`+- `STC8A8K64D4-45I-LQFP44`+- `STC8A8K64D4-45I-PDIP40`++## CAD (KiCad official)++- Symbol: `STC8A8K64D4-45I-LQFP48`+- Footprint: `Package_QFP:LQFP-48_7x7mm_P0.5mm`+- 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STC Micro datasheet](docs/stc8a8k64d4-45i-lqfp48-datasheet.pdf) (1168 pp, sha256 `0df2991ceeae5ee1`, retrieved 2026-08-17, 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:** `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/stc8a8k64d4-45i-lqfp48-datasheet.pdf)