Back to browse
STM32L552MEYxQ
STMicroelectronics Arm Cortex-M33 MCU, 512KB flash, 256KB RAM, 110 MHz, 1.71-3.6V, 58 GPIO, WLCSP81
Schematic Symbol
Pin Configuration (81 pins)
| Pin | Name | Type |
|---|---|---|
| A1 | VDD | power_in |
| A2 | PC10 | bidirectional |
| A3 | PD2 | bidirectional |
| A4 | PG13 | bidirectional |
| A5 | VDDIO2 | power_in |
| A6 | PB5 | bidirectional |
| A7 | PB9 | bidirectional |
| A8 | V15SMPS | power_in |
| A9 | VDD | power_in |
| B1 | VDDUSB | power_in |
| B2 | VSS | power_in |
| B3 | PC12 | bidirectional |
| B4 | PG12 | bidirectional |
| B5 | VSS | passive |
| B6 | PB4 | bidirectional |
| B7 | PC13 | bidirectional |
| B8 | VSS | passive |
| B9 | VBAT | power_in |
| C1 | PA11 | bidirectional |
| C2 | PA12 | bidirectional |
| C3 | PC11 | bidirectional |
| C4 | PG10 | bidirectional |
| C5 | PG15 | bidirectional |
| C6 | PB6 | bidirectional |
| C7 | PB8 | bidirectional |
| C8 | PC15 | bidirectional |
| C9 | PC14 | bidirectional |
| D1 | PA9 | bidirectional |
| D2 | PA13 | bidirectional |
| D3 | PA14 | bidirectional |
| D4 | PG9 | bidirectional |
| D5 | PG14 | bidirectional |
| D6 | PB7 | bidirectional |
| D7 | PH3 | bidirectional |
| D8 | PH1 | bidirectional |
| D9 | PH0 | bidirectional |
| E1 | PC6 | bidirectional |
| E2 | PC7 | bidirectional |
| E3 | PA10 | bidirectional |
| E4 | PA15 | bidirectional |
| E5 | PG11 | bidirectional |
| E6 | PB3 | bidirectional |
| E7 | PC0 | bidirectional |
| E8 | VSS | passive |
| E9 | NRST | input |
| F1 | PB15 | bidirectional |
| F2 | PB13 | bidirectional |
| F3 | PC8 | bidirectional |
| F4 | PA8 | bidirectional |
| F5 | PA3 | bidirectional |
| F6 | PA1 | bidirectional |
| F7 | PC2 | bidirectional |
| F8 | PC1 | bidirectional |
| F9 | VDD | power_in |
| G1 | PB14 | bidirectional |
| G2 | PB12 | bidirectional |
| G3 | PC9 | bidirectional |
| G4 | PC4 | bidirectional |
| G5 | PA6 | bidirectional |
| G6 | PA2 | bidirectional |
| G7 | PC3 | bidirectional |
| G8 | VREF+ | input |
| G9 | VSSA | power_in |
| H1 | VDD | power_in |
| H2 | VSS | passive |
| H3 | VLXSMPS | power_in |
| H4 | PB11 | bidirectional |
| H5 | PB1 | bidirectional |
| H6 | PA5 | bidirectional |
| H7 | PA4 | bidirectional |
| H8 | PA0 | bidirectional |
| H9 | VDDA | power_in |
| J1 | V15SMPS | power_in |
| J2 | VSSSMPS | power_in |
| J3 | VDDSMPS | power_in |
| J4 | PB10 | bidirectional |
| J5 | PB2 | bidirectional |
| J6 | PB0 | bidirectional |
| J7 | PA7 | bidirectional |
| J8 | VDD | power_in |
| J9 | VSS | passive |
Footprint
ConfirmedPackage_CSP/ST_WLCSP-81_4.36x4.07mm_Layout9x9_P0.4mm
Pad Layout
A1
A2
A3
A4
A5
A6
A7
A8
A9
B1
B2
B3
B4
B5
B6
B7
B8
B9
C1
C2
C3
C4
C5
C6
C7
C8
C9
D1
D2
D3
D4
D5
D6
D7
D8
D9
E1
E2
E3
E4
E5
E6
E7
E8
E9
F1
F2
F3
F4
F5
F6
F7
F8
F9
G1
G2
G3
G4
G5
G6
G7
G8
G9
H1
H2
H3
H4
H5
H6
H7
H8
H9
J1
J2
J3
J4
J5
J6
J7
J8
J9
Pads (81)
| Number | Type |
|---|---|
| A1 | smd |
| A2 | smd |
| A3 | smd |
| A4 | smd |
| A5 | smd |
| A6 | smd |
| A7 | smd |
| A8 | smd |
| A9 | smd |
| B1 | smd |
| B2 | smd |
| B3 | smd |
| B4 | smd |
| B5 | smd |
| B6 | smd |
| B7 | smd |
| B8 | smd |
| B9 | smd |
| C1 | smd |
| C2 | smd |
| C3 | smd |
| C4 | smd |
| C5 | smd |
| C6 | smd |
| C7 | smd |
| C8 | smd |
| C9 | smd |
| D1 | smd |
| D2 | smd |
| D3 | smd |
| D4 | smd |
| D5 | smd |
| D6 | smd |
| D7 | smd |
| D8 | smd |
| D9 | smd |
| E1 | smd |
| E2 | smd |
| E3 | smd |
| E4 | smd |
| E5 | smd |
| E6 | smd |
| E7 | smd |
| E8 | smd |
| E9 | smd |
| F1 | smd |
| F2 | smd |
| F3 | smd |
| F4 | smd |
| F5 | smd |
| F6 | smd |
| F7 | smd |
| F8 | smd |
| F9 | smd |
| G1 | smd |
| G2 | smd |
| G3 | smd |
| G4 | smd |
| G5 | smd |
| G6 | smd |
| G7 | smd |
| G8 | smd |
| G9 | smd |
| H1 | smd |
| H2 | smd |
| H3 | smd |
| H4 | smd |
| H5 | smd |
| H6 | smd |
| H7 | smd |
| H8 | smd |
| H9 | smd |
| J1 | smd |
| J2 | smd |
| J3 | smd |
| J4 | smd |
| J5 | smd |
| J6 | smd |
| J7 | smd |
| J8 | smd |
| J9 | smd |