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STM32L431RBYx
STMicroelectronics Arm Cortex-M4 MCU, 128KB flash, 64KB RAM, 80 MHz, 1.71-3.6V, 52 GPIO, WLCSP64
Schematic Symbol
Pin Configuration (64 pins)
| Pin | Name | Type |
|---|---|---|
| A1 | VDD | power_in |
| A2 | PA15 | bidirectional |
| A3 | PC12 | bidirectional |
| A4 | PD2 | bidirectional |
| A5 | PB3 | bidirectional |
| A6 | PB7 | bidirectional |
| A7 | VSS | power_in |
| A8 | VDD | power_in |
| B1 | VSS | passive |
| B2 | PA14 | bidirectional |
| B3 | PC11 | bidirectional |
| B4 | PB4 | bidirectional |
| B5 | PB6 | bidirectional |
| B6 | PB9 | bidirectional |
| B7 | VBAT | power_in |
| B8 | PC13 | bidirectional |
| C1 | PA12 | bidirectional |
| C2 | PA13 | bidirectional |
| C3 | PC10 | bidirectional |
| C4 | PB5 | bidirectional |
| C5 | PH3 | bidirectional |
| C6 | PB8 | bidirectional |
| C7 | PC15 | bidirectional |
| C8 | PC14 | bidirectional |
| D1 | PA9 | bidirectional |
| D2 | PA10 | bidirectional |
| D3 | PA11 | bidirectional |
| D4 | PC4 | bidirectional |
| D5 | PC0 | bidirectional |
| D6 | NRST | input |
| D7 | PH1 | bidirectional |
| D8 | PH0 | bidirectional |
| E1 | PC7 | bidirectional |
| E2 | PC9 | bidirectional |
| E3 | PA8 | bidirectional |
| E4 | PC5 | bidirectional |
| E5 | PA4 | bidirectional |
| E6 | PC3 | bidirectional |
| E7 | PC2 | bidirectional |
| E8 | PC1 | bidirectional |
| F1 | PC6 | bidirectional |
| F2 | PB15 | bidirectional |
| F3 | PC8 | bidirectional |
| F4 | PB0 | bidirectional |
| F5 | PA5 | bidirectional |
| F6 | PA2 | bidirectional |
| F7 | PA0 | bidirectional |
| F8 | VSSA | power_in |
| G1 | PB14 | bidirectional |
| G2 | PB13 | bidirectional |
| G3 | PB12 | bidirectional |
| G4 | PB2 | bidirectional |
| G5 | PA6 | bidirectional |
| G6 | PA3 | bidirectional |
| G7 | PA1 | bidirectional |
| G8 | VDDA | power_in |
| H1 | VDD | power_in |
| H2 | VSS | passive |
| H3 | PB11 | bidirectional |
| H4 | PB10 | bidirectional |
| H5 | PB1 | bidirectional |
| H6 | PA7 | bidirectional |
| H7 | VDD | power_in |
| H8 | VSS | passive |
Footprint
ConfirmedPackage_CSP/ST_WLCSP-64_Die435
Pad Layout
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
C1
C2
C3
C4
C5
C6
C7
C8
D1
D2
D3
D4
D5
D6
D7
D8
E1
E2
E3
E4
E5
E6
E7
E8
F1
F2
F3
F4
F5
F6
F7
F8
G1
G2
G3
G4
G5
G6
G7
G8
H1
H2
H3
H4
H5
H6
H7
H8
Pads (64)
| Number | Type |
|---|---|
| A1 | smd |
| A2 | smd |
| A3 | smd |
| A4 | smd |
| A5 | smd |
| A6 | smd |
| A7 | smd |
| A8 | smd |
| B1 | smd |
| B2 | smd |
| B3 | smd |
| B4 | smd |
| B5 | smd |
| B6 | smd |
| B7 | smd |
| B8 | smd |
| C1 | smd |
| C2 | smd |
| C3 | smd |
| C4 | smd |
| C5 | smd |
| C6 | smd |
| C7 | smd |
| C8 | smd |
| D1 | smd |
| D2 | smd |
| D3 | smd |
| D4 | smd |
| D5 | smd |
| D6 | smd |
| D7 | smd |
| D8 | smd |
| E1 | smd |
| E2 | smd |
| E3 | smd |
| E4 | smd |
| E5 | smd |
| E6 | smd |
| E7 | smd |
| E8 | smd |
| F1 | smd |
| F2 | smd |
| F3 | smd |
| F4 | smd |
| F5 | smd |
| F6 | smd |
| F7 | smd |
| F8 | smd |
| G1 | smd |
| G2 | smd |
| G3 | smd |
| G4 | smd |
| G5 | smd |
| G6 | smd |
| G7 | smd |
| G8 | smd |
| H1 | smd |
| H2 | smd |
| H3 | smd |
| H4 | smd |
| H5 | smd |
| H6 | smd |
| H7 | smd |
| H8 | smd |