CKS32F051C8T6 from CKS, 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	VBAT	power_in	Backup supply for RTC, external 32 kHz oscillator and backup registers when VDD is off. 1.65-3.6 V.
2	PC13	bidirectional	Standard 3.3 V I/O (TC). Additional functions: RTC_TAMP1, RTC_TS, RTC_OUT, WKUP2. Supplied via the VBAT switch - limited to 2 MHz / 30 pF, cannot source LED current.
3	PC14/OSC32_IN	bidirectional	Standard 3.3 V I/O (TC) muxed with the 32.768 kHz LSE oscillator input (OSC32_IN). Supplied via the VBAT switch with the same 2 MHz / 30 pF drive limits as PC13.
4	PC15/OSC32_OUT	bidirectional	Standard 3.3 V I/O (TC) muxed with the 32.768 kHz LSE oscillator output (OSC32_OUT). Backup-domain pin with 2 MHz / 30 pF drive limits.
5	PF0/OSC_IN	bidirectional	5 V-tolerant I/O (FT) muxed with the HSE main crystal oscillator input (OSC_IN, 4-32 MHz).
6	PF1/OSC_OUT	bidirectional	5 V-tolerant I/O (FT) muxed with the HSE main crystal oscillator output (OSC_OUT).
7	NRST	bidirectional	Bidirectional device reset (RST, active low) with internal weak pull-up. Asserted externally to reset the MCU, driven low internally on any internal reset source.
8	VSSA	power_in	Analog ground reference for ADC, DAC, reset block, RC oscillators and PLL. Tie to VSS on the board.
9	VDDA	power_in	Analog supply 2.0-3.6 V (min 2.4 V when ADC or DAC is used). Must be ≥ VDD and powered before VDD.
10	PA0	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: USART2_CTS, TIM2_CH1_ETR, COMP1_OUT, TSC_G1_IO1. Additional: ADC_IN0, COMP1_INM6, RTC_TAMP2, WKUP1.
11	PA1	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: USART2_RTS, TIM2_CH2, TSC_G1_IO2, EVENTOUT. Additional: ADC_IN1, COMP1_INP.
12	PA2	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: USART2_TX, TIM2_CH3, TIM15_CH1, COMP2_OUT, TSC_G1_IO3. Additional: ADC_IN2, COMP2_INM6.
13	PA3	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: USART2_RX, TIM2_CH4, TIM15_CH2, TSC_G1_IO4. Additional: ADC_IN3, COMP2_INP.
14	PA4	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: SPI1_NSS/I2S1_WS, USART2_CK, TIM14_CH1, TSC_G2_IO1. Additional: ADC_IN4, COMP1_INM4, COMP2_INM4, DAC1_OUT.
15	PA5	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: SPI1_SCK/I2S1_CK, CEC, TIM2_CH1_ETR, TSC_G2_IO2. Additional: ADC_IN5, COMP1_INM5, COMP2_INM5.
16	PA6	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: SPI1_MISO/I2S1_MCK, TIM3_CH1, TIM1_BKIN, TIM16_CH1, COMP1_OUT, TSC_G2_IO3, EVENTOUT. Additional: ADC_IN6.
17	PA7	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: SPI1_MOSI/I2S1_SD, TIM3_CH2, TIM14_CH1, TIM1_CH1N, TIM17_CH1, COMP2_OUT, TSC_G2_IO4, EVENTOUT. Additional: ADC_IN7.
18	PB0	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: TIM3_CH3, TIM1_CH2N, TSC_G3_IO2, EVENTOUT. Additional: ADC_IN8.
19	PB1	bidirectional	3.3 V I/O direct-to-ADC (TTa). AF: TIM3_CH4, TIM14_CH1, TIM1_CH3N, TSC_G3_IO3. Additional: ADC_IN9.
20	PB2	bidirectional	5 V-tolerant I/O (FT). AF: TSC_G3_IO4.
21	PB10	bidirectional	5 V-tolerant I/O (FT). AF: I2C2_SCL, CEC, TIM2_CH3, TSC_SYNC.
22	PB11	bidirectional	5 V-tolerant I/O (FT). AF: I2C2_SDA, TIM2_CH4, TSC_G6_IO1, EVENTOUT.
23	VSS	power_in	Digital ground.
24	VDD	power_in	Digital supply 2.0-3.6 V.
25	PB12	bidirectional	5 V-tolerant I/O (FT). AF: SPI2_NSS, TIM1_BKIN, TSC_G6_IO2, EVENTOUT.
26	PB13	bidirectional	5 V-tolerant I/O (FT). AF: SPI2_SCK, TIM1_CH1N, TSC_G6_IO3.
27	PB14	bidirectional	5 V-tolerant I/O (FT). AF: SPI2_MISO, TIM1_CH2N, TIM15_CH1, TSC_G6_IO4.
28	PB15	bidirectional	5 V-tolerant I/O (FT). AF: SPI2_MOSI, TIM1_CH3N, TIM15_CH1N, TIM15_CH2. Additional: RTC_REFIN.
29	PA8	bidirectional	5 V-tolerant I/O (FT). AF: USART1_CK, TIM1_CH1, EVENTOUT, MCO.
30	PA9	bidirectional	5 V-tolerant I/O (FT). AF: USART1_TX, TIM1_CH2, TIM15_BKIN, TSC_G4_IO1.
31	PA10	bidirectional	5 V-tolerant I/O (FT). AF: USART1_RX, TIM1_CH3, TIM17_BKIN, TSC_G4_IO2.
32	PA11	bidirectional	5 V-tolerant I/O (FT). AF: USART1_CTS, TIM1_CH4, COMP1_OUT, TSC_G4_IO3, EVENTOUT.
33	PA12	bidirectional	5 V-tolerant I/O (FT). AF: USART1_RTS, TIM1_ETR, COMP2_OUT, TSC_G4_IO4, EVENTOUT.
34	PA13/SWDIO	bidirectional	5 V-tolerant I/O (FT). Configured as SWDAT (SWDIO) after reset with internal pull-up. AF: IR_OUT, SWDAT.
35	PF6	bidirectional	5 V-tolerant I/O (FT). AF: I2C2_SCL.
36	PF7	bidirectional	5 V-tolerant I/O (FT). AF: I2C2_SDA.
37	PA14/SWCLK	bidirectional	5 V-tolerant I/O (FT). Configured as SWCLK after reset with internal pull-down. AF: USART2_TX, SWCLK.
38	PA15	bidirectional	5 V-tolerant I/O (FT). AF: SPI1_NSS/I2S1_WS, USART2_RX, TIM2_CH1_ETR, EVENTOUT.
39	PB3	bidirectional	5 V-tolerant I/O (FT). AF: SPI1_SCK/I2S1_CK, TIM2_CH2, TSC_G5_IO1, EVENTOUT.
40	PB4	bidirectional	5 V-tolerant I/O (FT). AF: SPI1_MISO/I2S1_MCK, TIM3_CH1, TSC_G5_IO2, EVENTOUT.
41	PB5	bidirectional	5 V-tolerant I/O (FT). AF: SPI1_MOSI/I2S1_SD, I2C1_SMBA, TIM16_BKIN, TIM3_CH2.
42	PB6	bidirectional	5 V-tolerant I/O with Fast-Mode+ (FTf, 20 mA sink for I2C Fm+). AF: I2C1_SCL, USART1_TX, TIM16_CH1N, TSC_G5_IO3.
43	PB7	bidirectional	5 V-tolerant I/O with Fast-Mode+ (FTf). AF: I2C1_SDA, USART1_RX, TIM17_CH1N, TSC_G5_IO4.
44	BOOT0	input	Dedicated boot-mode select input (B). Sampled at reset with the option-byte boot bit to select boot from user Flash / system memory / SRAM. Must be tied through an external pull-up or pull-down; cannot be left floating.
45	PB8	bidirectional	5 V-tolerant I/O with Fast-Mode+ (FTf). AF: I2C1_SCL, CEC, TIM16_CH1, TSC_SYNC.
46	PB9	bidirectional	5 V-tolerant I/O with Fast-Mode+ (FTf). AF: I2C1_SDA, IR_OUT, TIM17_CH1, EVENTOUT.
47	VSS	power_in	Digital ground.
48	VDD	power_in	Digital supply 2.0-3.6 V.

Key specifications

Parameter	Value
Manufacturer	CKS
Package	LQFP-48(7x7)
Category	MCU
Pins	48

Ordering variants

Same part, different packaging or reel option.

CKS32F051C8T6
CKS32F051C8T6C6T6
CKS32F051C8T6C4T6
CKS32F051C8T6C8T7
CKS32F051C8T6C6T7
CKS32F051C8T6C4T7
CKS32F051C8T6C8U6
CKS32F051C8T6C6U6
CKS32F051C8T6C4U6
CKS32F051C8T6C8U7
CKS32F051C8T6C6U7
CKS32F051C8T6C4U7
CKS32F051C8T6R8T6
CKS32F051C8T6R6T6
CKS32F051C8T6R4T6
CKS32F051C8T6R8T7
CKS32F051C8T6R6T7
CKS32F051C8T6R4T7
CKS32F051C8T6K8T6
CKS32F051C8T6K6T6
CKS32F051C8T6K4T6
CKS32F051C8T6K8T7
CKS32F051C8T6K6T7
CKS32F051C8T6K4T7
CKS32F051C8T6K8U6
CKS32F051C8T6K6U6
CKS32F051C8T6K4U6
CKS32F051C8T6K8U7
CKS32F051C8T6K6U7
CKS32F051C8T6K4U7

CAD (KiCad official)

Symbol: CKS32F051C8T6
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: CKS datasheet (91 pp, sha256 e733607a3ed17f59, 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