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STM32F101ZET6

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-144(20x20)

STM32F101ZET6 from STMicroelectronics, in a LQFP-144(20x20). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	PE2	bidirectional	5 V-tolerant I/O (FT) with default function PE2; alternate functions TRACECLK and FSMC_A23.
2	PE3	bidirectional	5 V-tolerant I/O (FT) with default function PE3; alternate functions TRACED0 and FSMC_A19.
3	PE4	bidirectional	5 V-tolerant I/O (FT) with default function PE4; alternate functions TRACED1 and FSMC_A20.
4	PE5	bidirectional	5 V-tolerant I/O (FT) with default function PE5; alternate functions TRACED2 and FSMC_A21.
5	PE6	bidirectional	5 V-tolerant I/O (FT) with default function PE6; alternate functions TRACED3 and FSMC_A22.
6	VBAT	power_in	Backup supply pin for the RTC and backup registers (VBAT supply).
7	PC13-TAMPER-RTC	bidirectional	Supplied through the power switch, which sinks only 3 mA, so output speed must not exceed 2 MHz at 30 pF and the pin must not source current such as driving an LED; alternate function TAMPER-RTC.
8	PC14-OSC32_IN	bidirectional	Supplied through the power switch (3 mA limit), so output speed must not exceed 2 MHz at 30 pF and it must not be used as a current source; alternate function OSC32_IN.
9	PC15-OSC32_OUT	bidirectional	Supplied through the power switch (3 mA limit), so output speed must not exceed 2 MHz at 30 pF and it must not be used as a current source; alternate function OSC32_OUT.
10	PF0	bidirectional	5 V-tolerant I/O (FT) with default function PF0; alternate function FSMC_A0.
11	PF1	bidirectional	5 V-tolerant I/O (FT) with default function PF1; alternate function FSMC_A1.
12	PF2	bidirectional	5 V-tolerant I/O (FT) with default function PF2; alternate function FSMC_A2.
13	PF3	bidirectional	5 V-tolerant I/O (FT) with default function PF3; alternate function FSMC_A3.
14	PF4	bidirectional	5 V-tolerant I/O (FT) with default function PF4; alternate function FSMC_A4.
15	PF5	bidirectional	5 V-tolerant I/O (FT) with default function PF5; alternate function FSMC_A5.
16	VSS_5	power_in	Digital ground pin VSS_5.
17	VDD_5	power_in	Digital supply pin VDD_5; application supply and I/Os range 2.0 to 3.6 V.
18	PF6	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PF6; alternate function FSMC_NIORD.
19	PF7	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PF7; alternate function FSMC_NREG.
20	PF8	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PF8; alternate function FSMC_NIOWR.
21	PF9	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PF9; alternate function FSMC_CD.
22	PF10	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PF10; alternate function FSMC_INTR.
23	OSC_IN	input	HSE oscillator input pin (OSC_IN); on this package PD0 is available by default as a remap-free alternate function (footnote 7 and 8).
24	OSC_OUT	output	HSE oscillator output pin (OSC_OUT); on this package PD1 is available by default as a remap-free alternate function (footnote 7 and 8).
25	NRST	bidirectional	Active-low reset pin (I/O type, no FT level) of the microcontroller.
26	PC0	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PC0; alternate function ADC_IN10.
27	PC1	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PC1; alternate function ADC_IN11.
28	PC2	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PC2; alternate function ADC_IN12.
29	PC3	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PC3; alternate function ADC_IN13.
30	VSSA	power_in	Analog ground pin; the ADC conversion range is referenced to VSSA.
31	VREF-	power_in	Negative ADC reference, which can be internally connected to VSSA depending on the package.
32	VREF+	power_in	Positive ADC reference voltage, 2.4 V to VDDA.
33	VDDA	power_in	Analog supply pin for the ADC, 2.4 V to 3.6 V.
34	PA0-WKUP	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA0; alternate functions WKUP, USART2_CTS, ADC_IN0, TIM5_CH1 and TIM2_CH1_ETR.
35	PA1	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA1; alternate functions USART2_RTS, ADC_IN1, TIM5_CH2 and TIM2_CH2.
36	PA2	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA2; alternate functions USART2_TX, TIM5_CH3, ADC_IN2 and TIM2_CH3.
37	PA3	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA3; alternate functions USART2_RX, TIM5_CH4, ADC_IN3 and TIM2_CH4.
38	VSS_4	power_in	Digital ground pin VSS_4.
39	VDD_4	power_in	Digital supply pin VDD_4; application supply and I/Os range 2.0 to 3.6 V.
40	PA4	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA4; alternate functions SPI1_NSS, DAC_OUT1, ADC_IN4 and USART2_CK.
41	PA5	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA5; alternate functions SPI1_SCK, DAC_OUT2 and ADC_IN5.
42	PA6	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA6; alternate functions SPI1_MISO, ADC_IN6 and TIM3_CH1.
43	PA7	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PA7; alternate functions SPI1_MOSI, ADC_IN7 and TIM3_CH2.
44	PC4	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PC4; alternate function ADC_IN14.
45	PC5	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PC5; alternate function ADC_IN15.
46	PB0	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PB0; alternate functions ADC_IN8 and TIM3_CH3.
47	PB1	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PB1; alternate functions ADC_IN9 and TIM3_CH4.
48	PB2/BOOT1	bidirectional	5 V-tolerant I/O (FT) with default function PB2/BOOT1.
49	PF11	bidirectional	5 V-tolerant I/O (FT) with default function PF11; alternate function FSMC_NIOS16.
50	PF12	bidirectional	5 V-tolerant I/O (FT) with default function PF12; alternate function FSMC_A6.
51	VSS_6	power_in	Digital ground pin VSS_6.
52	VDD_6	power_in	Digital supply pin VDD_6; application supply and I/Os range 2.0 to 3.6 V.
53	PF13	bidirectional	5 V-tolerant I/O (FT) with default function PF13; alternate function FSMC_A7.
54	PF14	bidirectional	5 V-tolerant I/O (FT) with default function PF14; alternate function FSMC_A8.
55	PF15	bidirectional	5 V-tolerant I/O (FT) with default function PF15; alternate function FSMC_A9.
56	PG0	bidirectional	5 V-tolerant I/O (FT) with default function PG0; alternate function FSMC_A10.
57	PG1	bidirectional	5 V-tolerant I/O (FT) with default function PG1; alternate function FSMC_A11.
58	PE7	bidirectional	5 V-tolerant I/O (FT) with default function PE7; alternate function FSMC_D4.
59	PE8	bidirectional	5 V-tolerant I/O (FT) with default function PE8; alternate function FSMC_D5.
60	PE9	bidirectional	5 V-tolerant I/O (FT) with default function PE9; alternate function FSMC_D6.
61	VSS_7	power_in	Digital ground pin VSS_7.
62	VDD_7	power_in	Digital supply pin VDD_7; application supply and I/Os range 2.0 to 3.6 V.
63	PE10	bidirectional	5 V-tolerant I/O (FT) with default function PE10; alternate function FSMC_D7.
64	PE11	bidirectional	5 V-tolerant I/O (FT) with default function PE11; alternate function FSMC_D8.
65	PE12	bidirectional	5 V-tolerant I/O (FT) with default function PE12; alternate function FSMC_D9.
66	PE13	bidirectional	5 V-tolerant I/O (FT) with default function PE13; alternate function FSMC_D10.
67	PE14	bidirectional	5 V-tolerant I/O (FT) with default function PE14; alternate function FSMC_D11.
68	PE15	bidirectional	5 V-tolerant I/O (FT) with default function PE15; alternate function FSMC_D12.
69	PB10	bidirectional	5 V-tolerant I/O (FT) with default function PB10; alternate functions I2C2_SCL, USART3_TX and TIM2_CH3.
70	PB11	bidirectional	5 V-tolerant I/O (FT) with default function PB11; alternate functions I2C2_SDA, USART3_RX and TIM2_CH4.
71	VSS_1	power_in	Digital ground pin VSS_1.
72	VDD_1	power_in	Digital supply pin VDD_1; application supply and I/Os range 2.0 to 3.6 V.
73	PB12	bidirectional	5 V-tolerant I/O (FT) with default function PB12; alternate functions SPI2_NSS, I2C2_SMBA and USART3_CK.
74	PB13	bidirectional	5 V-tolerant I/O (FT) with default function PB13; alternate functions SPI2_SCK and USART3_CTS.
75	PB14	bidirectional	5 V-tolerant I/O (FT) with default function PB14; alternate functions SPI2_MISO and USART3_RTS.
76	PB15	bidirectional	5 V-tolerant I/O (FT) with default function PB15; alternate function SPI2_MOSI.
77	PD8	bidirectional	5 V-tolerant I/O (FT) with default function PD8; alternate functions FSMC_D13 and USART3_TX.
78	PD9	bidirectional	5 V-tolerant I/O (FT) with default function PD9; alternate functions FSMC_D14 and USART3_RX.
79	PD10	bidirectional	5 V-tolerant I/O (FT) with default function PD10; alternate functions FSMC_D15 and USART3_CK.
80	PD11	bidirectional	5 V-tolerant I/O (FT) with default function PD11; alternate functions FSMC_A16 and USART3_CTS.
81	PD12	bidirectional	5 V-tolerant I/O (FT) with default function PD12; alternate functions FSMC_A17, TIM4_CH1 and USART3_RTS.
82	PD13	bidirectional	5 V-tolerant I/O (FT) with default function PD13; alternate functions FSMC_A18 and TIM4_CH2.
83	VSS_8	power_in	Digital ground pin VSS_8.
84	VDD_8	power_in	Digital supply pin VDD_8; application supply and I/Os range 2.0 to 3.6 V.
85	PD14	bidirectional	5 V-tolerant I/O (FT) with default function PD14; alternate functions FSMC_D0 and TIM4_CH3.
86	PD15	bidirectional	5 V-tolerant I/O (FT) with default function PD15; alternate functions FSMC_D1 and TIM4_CH4.
87	PG2	bidirectional	5 V-tolerant I/O (FT) with default function PG2; alternate function FSMC_A12.
88	PG3	bidirectional	5 V-tolerant I/O (FT) with default function PG3; alternate function FSMC_A13.
89	PG4	bidirectional	5 V-tolerant I/O (FT) with default function PG4; alternate function FSMC_A14.
90	PG5	bidirectional	5 V-tolerant I/O (FT) with default function PG5; alternate function FSMC_A15.
91	PG6	bidirectional	5 V-tolerant I/O (FT) with default function PG6; alternate function FSMC_INT2.
92	PG7	bidirectional	5 V-tolerant I/O (FT) with default function PG7; alternate function FSMC_INT3.
93	PG8	bidirectional	5 V-tolerant I/O (FT) with default function PG8 and no listed alternate function.
94	VSS_9	power_in	Digital ground pin VSS_9.
95	VDD_9	power_in	Digital supply pin VDD_9; application supply and I/Os range 2.0 to 3.6 V.
96	PC6	bidirectional	5 V-tolerant I/O (FT) with default function PC6; alternate function TIM3_CH1.
97	PC7	bidirectional	5 V-tolerant I/O (FT) with default function PC7; alternate function TIM3_CH2.
98	PC8	bidirectional	5 V-tolerant I/O (FT) with default function PC8; alternate function TIM3_CH3.
99	PC9	bidirectional	5 V-tolerant I/O (FT) with default function PC9; alternate function TIM3_CH4.
100	PA8	bidirectional	5 V-tolerant I/O (FT) with default function PA8; alternate functions USART1_CK and MCO.
101	PA9	bidirectional	5 V-tolerant I/O (FT) with default function PA9; alternate function USART1_TX.
102	PA10	bidirectional	5 V-tolerant I/O (FT) with default function PA10; alternate function USART1_RX.
103	PA11	bidirectional	5 V-tolerant I/O (FT) with default function PA11; alternate function USART1_CTS.
104	PA12	bidirectional	5 V-tolerant I/O (FT) with default function PA12; alternate function USART1_RTS.
105	PA13	bidirectional	5 V-tolerant I/O (FT) with default function JTMS-SWDIO; remap function PA13 is listed in the Remap column.
106	NC	unconnected	Not connected.
107	VSS_2	power_in	Digital ground pin VSS_2.
108	VDD_2	power_in	Digital supply pin VDD_2; application supply and I/Os range 2.0 to 3.6 V.
109	PA14	bidirectional	5 V-tolerant I/O (FT) with default function JTCK-SWCLK; remap function PA14 is listed in the Remap column.
110	PA15	bidirectional	5 V-tolerant I/O (FT) with default function JTDI; alternate functions SPI3_NSS, TIM2_CH1_ETR, PA15 (remap) and SPI1_NSS.
111	PC10	bidirectional	5 V-tolerant I/O (FT) with default function PC10; alternate functions UART4_TX and USART3_TX.
112	PC11	bidirectional	5 V-tolerant I/O (FT) with default function PC11; alternate functions UART4_RX and USART3_RX.
113	PC12	bidirectional	5 V-tolerant I/O (FT) with default function PC12; alternate functions UART5_TX and USART3_CK.
114	PD0	bidirectional	5 V-tolerant I/O (FT) with default function OSC_IN (footnote 8) and alternate function FSMC_D2; available by default on this package.
115	PD1	bidirectional	5 V-tolerant I/O (FT) with default function OSC_OUT (footnote 8) and alternate function FSMC_D3; available by default on this package.
116	PD2	bidirectional	5 V-tolerant I/O (FT) with default function PD2; alternate functions TIM3_ETR and UART5_RX.
117	PD3	bidirectional	5 V-tolerant I/O (FT) with default function PD3; alternate functions FSMC_CLK and USART2_CTS.
118	PD4	bidirectional	5 V-tolerant I/O (FT) with default function PD4; alternate functions FSMC_NOE and USART2_RTS.
119	PD5	bidirectional	5 V-tolerant I/O (FT) with default function PD5; alternate functions FSMC_NWE and USART2_TX.
120	VSS_10	power_in	Digital ground pin VSS_10.
121	VDD_10	power_in	Digital supply pin VDD_10; application supply and I/Os range 2.0 to 3.6 V.
122	PD6	bidirectional	5 V-tolerant I/O (FT) with default function PD6; alternate functions FSMC_NWAIT and USART2_RX.
123	PD7	bidirectional	5 V-tolerant I/O (FT) with default function PD7; alternate functions FSMC_NE1/FSMC_NCE2 and USART2_CK.
124	PG9	bidirectional	5 V-tolerant I/O (FT) with default function PG9; alternate function FSMC_NE2/FSMC_NCE3.
125	PG10	bidirectional	5 V-tolerant I/O (FT) with default function PG10; alternate functions FSMC_NE3 and FSMC_NCE4_1.
126	PG11	bidirectional	5 V-tolerant I/O (FT) with default function PG11; alternate function FSMC_NCE4_2.
127	PG12	bidirectional	5 V-tolerant I/O (FT) with default function PG12; alternate function FSMC_NE4.
128	PG13	bidirectional	5 V-tolerant I/O (FT) with default function PG13; alternate function FSMC_A24.
129	PG14	bidirectional	5 V-tolerant I/O (FT) with default function PG14; alternate function FSMC_A25.
130	VSS_11	power_in	Digital ground pin VSS_11.
131	VDD_11	power_in	Digital supply pin VDD_11; application supply and I/Os range 2.0 to 3.6 V.
132	PG15	bidirectional	5 V-tolerant I/O (FT) with default function PG15 and no listed alternate function.
133	PB3	bidirectional	5 V-tolerant I/O (FT) with default function JTDO; alternate functions SPI3_SCK, TIM2_CH2, PB3 (remap), TRACESWO and SPI1_SCK.
134	PB4	bidirectional	5 V-tolerant I/O (FT) with default function NJTRST; alternate functions SPI3_MISO, PB4 (remap), TIM3_CH1 and SPI1_MISO.
135	PB5	bidirectional	Standard I/O without FT level (not 5 V-tolerant) with default function PB5; alternate functions I2C1_SMBA, SPI3_MOSI, TIM3_CH2 and SPI1_MOSI.
136	PB6	bidirectional	5 V-tolerant I/O (FT) with default function PB6; alternate functions I2C1_SCL, TIM4_CH1 and USART1_TX.
137	PB7	bidirectional	5 V-tolerant I/O (FT) with default function PB7; alternate functions I2C1_SDA, FSMC_NADV, TIM4_CH2 and USART1_RX.
138	BOOT0	input	Boot mode selection input BOOT0 (type I, no FT level).
139	PB8	bidirectional	5 V-tolerant I/O (FT) with default function PB8; alternate functions TIM4_CH3 and I2C1_SCL.
140	PB9	bidirectional	5 V-tolerant I/O (FT) with default function PB9; alternate functions TIM4_CH4 and I2C1_SDA.
141	PE0	bidirectional	5 V-tolerant I/O (FT) with default function PE0; alternate functions TIM4_ETR and FSMC_NBL0.
142	PE1	bidirectional	5 V-tolerant I/O (FT) with default function PE1; alternate function FSMC_NBL1.
143	VSS_3	power_in	Digital ground pin VSS_3.
144	VDD_3	power_in	Digital supply pin VDD_3; application supply and I/Os range 2.0 to 3.6 V.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	LQFP-144(20x20)
Category	Embedded Processors & Controllers
Pins	144

CAD (KiCad official)

Symbol: STM32F101ZET6
Footprint: Package_QFP:LQFP-144_20x20mm_P0.5mm
3D model: LQFP-144(20x20) (KiCad packages3D, STEP)
3D model files: stm32f101zet6-etched.step / stm32f101zet6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32f101zet6.step / stm32f101zet6.glb are the bare package body.

Provenance

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

Datasheet: STMicroelectronics datasheet (121 pp, sha256 1828693b7ac44c2e, retrieved 2026-10-11, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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