.hide-partial { max-height: none; } .show-more { display: none; }

STMicroelectronics Embedded Processors & Controllers

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Embedded Processors & Controllers

List Images

Results: 5.724

Applied Filters:

Brand = STMicroelectronics

Product Type

Mounting Style

Package/Case

Core

Data Bus Width

Maximum Clock Frequency

Program Memory Size

L1 Cache Instruction Memory

L1 Cache Data Memory

Data RAM Size

ADC Resolution

Number of I/Os

Minimum Operating Temperature

Maximum Operating Temperature

Qualification

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Microprocessors - MPU MPU Dual Arm Cortex-A35 1.5GHz Cortex-M33 400MHz 3xEther (2+1 switch) 3xFD-CAN

STM32MP257FAI3
STMicroelectronics
1: Rp588.540
1.720In Stock

Mfr. Part No.
STM32MP257FAI3

Mouser Part No
511-STM32MP257FAI3

STMicroelectronics

Microprocessors - MPU MPU Dual Arm Cortex-A35 1.5GHz Cortex-M33 400MHz 3xEther (2+1 switch) 3xFD-CAN

Learn More

Datasheet

1.720In Stock

Rp588.540

Rp476.446

Rp448.376

Rp417.555

View

Min.: 1
Mult.: 1

Microprocessors - MPU

SMD/SMT

TFBGA-436

ARM Cortex A35, ARM Cortex M33

32 bit

400 MHz, 1.5 GHz

648 kB

172 I/O

- 40 C

+ 125 C

Tray

Microprocessors - MPU MPU Dual Arm Cortex-A35 1.5GHz Cortex-M33 400MHz 3xEther (2+1 switch) 3xFD-CAN

STM32MP257FAK3
STMicroelectronics
1: Rp512.220
1.099In Stock

Mfr. Part No.
STM32MP257FAK3

Mouser Part No
511-STM32MP257FAK3

STMicroelectronics

Microprocessors - MPU MPU Dual Arm Cortex-A35 1.5GHz Cortex-M33 400MHz 3xEther (2+1 switch) 3xFD-CAN

Learn More

Datasheet

1.099In Stock

Rp512.220

Rp412.785

Rp388.018

Rp360.682

View

Min.: 1
Mult.: 1

Microprocessors - MPU

SMD/SMT

VFBGA-424

ARM Cortex A35, ARM Cortex M33

32 bit

400 MHz, 1.5 GHz

648 kB

144 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 256-Kbytes Flash LCD, USB, AES, 48 MHz CPU

STM32U083KCU6
STMicroelectronics
1: Rp63.110
12.599In Stock

Mfr. Part No.
STM32U083KCU6

Mouser Part No
511-STM32U083KCU6

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 256-Kbytes Flash LCD, USB, AES, 48 MHz CPU

Learn More

Datasheet

12.599In Stock

Rp63.110

Rp47.333

Rp43.480

Rp39.260

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

ARM Cortex M0

48 MHz

256 kB

Tray

ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 256-Kbytes Flash LCD, USB, AES, 48 MHz CPU

STM32U083RCT6
STMicroelectronics
1: Rp75.402
10.346In Stock
6.720Expected 04/12/2026

Mfr. Part No.
STM32U083RCT6

Mouser Part No
511-STM32U083RCT6

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 256-Kbytes Flash LCD, USB, AES, 48 MHz CPU

Learn More

Datasheet

10.346In Stock

6.720Expected 04/12/2026

Rp75.402

Rp56.873

Rp49.351

Rp48.250

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

ARM Cortex M0

48 MHz

256 kB

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 160 MHz 2Mbytes Flash

STM32U585AII3
STMicroelectronics
1: Rp230.793
2.485In Stock

Mfr. Part No.
STM32U585AII3

Mouser Part No
511-STM32U585AII3

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 160 MHz 2Mbytes Flash

Learn More

Datasheet

2.485In Stock

Rp230.793

Rp181.258

Rp168.783

Rp155.207

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

STM32U595QJI6
STMicroelectronics
1: Rp288.032
1.652In Stock

Mfr. Part No.
STM32U595QJI6

Mouser Part No
511-STM32U595QJI6

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

Learn More

Datasheet

1.652In Stock

Rp288.032

Rp232.444

Rp228.775

Rp211.162

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4 Mbytes Flash

STM32U5A5AJH3
STMicroelectronics
1: Rp341.969
2.538In Stock

Mfr. Part No.
STM32U5A5AJH3

Mouser Part No
511-STM32U5A5AJH3

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4 Mbytes Flash

Learn More

Datasheet

2.538In Stock

Rp341.969

Rp272.071

Rp254.642

Rp235.379

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

TFBGA-169

ARM Cortex M33

32 bit

160 MHz

4 MB

2.5 MB

12 bit, 14 bit

8 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

STM32U5A5AJH6Q
STMicroelectronics
1: Rp309.497
2.389In Stock

Mfr. Part No.
STM32U5A5AJH6Q

Mouser Part No
511-STM32U5A5AJH6Q

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

Learn More

Datasheet

2.389In Stock

Rp309.497

Rp252.258

Rp238.681

Rp218.317

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4 Mbytes Flash

STM32U5A5QJI3Q
STMicroelectronics
1: Rp338.851
1.705In Stock

Mfr. Part No.
STM32U5A5QJI3Q

Mouser Part No
511-STM32U5A5QJI3Q

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4 Mbytes Flash

Learn More

Datasheet

1.705In Stock

Rp338.851

Rp269.319

Rp252.074

Rp232.994

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFBGA-132

ARM Cortex M33

32 bit

160 MHz

2 MB

2.5 MB

12 bit

156 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

STM32U5A5QJI6
STMicroelectronics
1: Rp300.691
1.907In Stock

Mfr. Part No.
STM32U5A5QJI6

Mouser Part No
511-STM32U5A5QJI6

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

Learn More

Datasheet

1.907In Stock

Rp300.691

Rp257.578

Rp240.700

Rp216.483

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

STM32U5A5QJI6Q
STMicroelectronics
1: Rp307.479
1.444In Stock

Mfr. Part No.
STM32U5A5QJI6Q

Mouser Part No
511-STM32U5A5QJI6Q

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 MCU TrustZone, 160 MHz 4Mbytes of Flash

Learn More

Datasheet

1.444In Stock

Rp307.479

Rp250.790

Rp236.296

Rp217.217

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

ARM Microcontrollers - MCU Advanced Graphics Ultra Low Power CortexM-33 Trustzone, NEOCHROM VG GPU, 160MHZ

STM32U5G9BJY6QTR
STMicroelectronics
1: Rp352.427
2.430In Stock

Mfr. Part No.
STM32U5G9BJY6QTR

Mouser Part No
511-STM32U5G9BJY6QTR

STMicroelectronics

ARM Microcontrollers - MCU Advanced Graphics Ultra Low Power CortexM-33 Trustzone, NEOCHROM VG GPU, 160MHZ

Learn More

Datasheet

2.430In Stock

Cut Tape

Rp352.427

Rp280.510

Rp262.531

Rp242.901

View

Reel

Rp216.666

MouseReel Available

Min.: 1
Mult.: 1

: 3.500

ARM Microcontrollers - MCU

Reel, Cut Tape, MouseReel

RF Microcontrollers - MCU Ultra-low-power, Arm Cortex-M33 Trust Zone MCU 100 MHz 1 Mbyte Flash, BLE 5.4

STM32WBA52KGU6
STMicroelectronics
1: Rp89.895
5.942In Stock

Mfr. Part No.
STM32WBA52KGU6

Mouser Part No
511-STM32WBA52KGU6

STMicroelectronics

RF Microcontrollers - MCU Ultra-low-power, Arm Cortex-M33 Trust Zone MCU 100 MHz 1 Mbyte Flash, BLE 5.4

Learn More

Datasheet

5.942In Stock

Rp89.895

Rp73.934

Rp69.531

Rp64.211

View

Min.: 1
Mult.: 1

RF Microcontrollers - MCU

SMD/SMT

UFQFPN-32

ARM Cortex M33

32 bit

100 MHz

64 kB

12 bit

20 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Sub-GHz Wireless MCU Single-core Arm Cortex-M0+ 64 MHz 64 Kb Flash 16 Kb SRAM

STM32WL33C8V6
STMicroelectronics
1: Rp95.583
5.874In Stock

Mfr. Part No.
STM32WL33C8V6

Mouser Part No
511-STM32WL33C8V6

STMicroelectronics

ARM Microcontrollers - MCU Sub-GHz Wireless MCU Single-core Arm Cortex-M0+ 64 MHz 64 Kb Flash 16 Kb SRAM

Learn More

Datasheet

5.874In Stock

Rp95.583

Rp72.650

Rp68.431

Rp64.761

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

VFQFPN-48

ARM Cortex M0+

32 bit

64 MHz

64 kB

16 KB

12 bit

32 I/O

- 40 C

+ 85 C

Tray

8-bit Microcontrollers - MCU STM8L Ultra LP 8-Bit LCD 32-Pin 32kB

STM8L151M8T6
STMicroelectronics
1: Rp110.076
350In Stock

Mfr. Part No.
STM8L151M8T6

Mouser Part No
511-STM8L151M8T6

STMicroelectronics

8-bit Microcontrollers - MCU STM8L Ultra LP 8-Bit LCD 32-Pin 32kB

Learn More

Datasheet

350In Stock

Rp110.076

Rp75.586

Rp70.449

Rp62.009

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

UFQFPN-80

STM8

8 bit

16 MHz

64 kB

4 kB

12 bit

68 I/O

- 40 C

+ 85 C

Tray

RF System on a Chip - SoC GSMA eSIM system-on-chip for secure M2M industrial applications

ST4SI2M0020TPIFW
STMicroelectronics
1: Rp74.485
7.792In Stock

Mfr. Part No.
ST4SI2M0020TPIFW

Mouser Part No
511-ST4SI2M0020TPIFW

STMicroelectronics

RF System on a Chip - SoC GSMA eSIM system-on-chip for secure M2M industrial applications

Learn More

Datasheet

Product Comments

7.792In Stock

Cut Tape

Rp74.485

Rp57.240

Rp52.653

Rp47.700

View

Reel

Rp40.728

MouseReel Available

Min.: 1
Mult.: 1

: 4.000

RF System on a Chip - SoC

SMD/SMT

VFDFPN-8

RISC

32 bit

- 40 C

+ 105 C

Reel, Cut Tape, MouseReel

ARM Microcontrollers - MCU 32B ARM Cortex-M3 Value line 16KB Flsh

STM32F100R4T6BTR
STMicroelectronics
1: Rp93.748
2.000In Stock

Mfr. Part No.
STM32F100R4T6BTR

Mouser Part No
511-STM32F100R4T6BTR

STMicroelectronics

ARM Microcontrollers - MCU 32B ARM Cortex-M3 Value line 16KB Flsh

Learn More

Datasheet

2.000In Stock

Cut Tape

Rp93.748

Rp71.366

Rp65.862

Rp59.808

View

Reel

Rp48.984

MouseReel Available

Min.: 1
Mult.: 1

: 1.000

ARM Microcontrollers - MCU

SMD/SMT

ARM Cortex M3

32 bit

24 MHz

128 kB

4 kB

12 bit

51 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

ARM Microcontrollers - MCU Mainstream Connectivity line, Arm Cortex-M3 MCU 256 Kbytes of Flash 72 MHz CPU,

STM32F105RCT6V
STMicroelectronics
1: Rp254.826
510In Stock
NRND

Mfr. Part No.
STM32F105RCT6V

Mouser Part No
511-STM32F105RCT6V

NRND

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Connectivity line, Arm Cortex-M3 MCU 256 Kbytes of Flash 72 MHz CPU,

Learn More

Datasheet

510In Stock

Rp254.826

Rp194.835

Rp180.892

Rp164.197

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M3

32 bit

72 MHz

256 kB

64 kB

12 bit

51 I/O

- 40 C

+ 85 C

ARM Microcontrollers - MCU Mainstream Connectivity line, Arm Cortex-M3 MCU 256 Kbytes of Flash 72 MHz CPU,

STM32F105VCT6W
STMicroelectronics
1: Rp230.793
333In Stock
NRND

Mfr. Part No.
STM32F105VCT6W

Mouser Part No
511-STM32F105VCT6W

NRND

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Connectivity line, Arm Cortex-M3 MCU 256 Kbytes of Flash 72 MHz CPU,

Learn More

Datasheet

333In Stock

Rp230.793

Rp181.258

Rp156.124

Rp150.988

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M3

32 bit

72 MHz

256 kB

64 kB

12 bit

80 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 512kB

STM32F215VET6
STMicroelectronics
1: Rp256.477
526In Stock

Mfr. Part No.
STM32F215VET6

Mouser Part No
511-STM32F215VET6

STMicroelectronics

ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 512kB

Learn More

Datasheet

526In Stock

Rp256.477

Rp189.147

Rp174.470

Rp162.729

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M3

32 bit

120 MHz

512 kB

128 kB

12 bit

82 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance Arm Cortex-M3 MCU 1 Mbyte of Flash 120 MHz CPU, ART Accel, HW c

STM32F215VGT7
STMicroelectronics
1: Rp194.468
519In Stock

Mfr. Part No.
STM32F215VGT7

Mouser Part No
511-STM32F215VGT7

STMicroelectronics

ARM Microcontrollers - MCU High-performance Arm Cortex-M3 MCU 1 Mbyte of Flash 120 MHz CPU, ART Accel, HW c

Learn More

Datasheet

519In Stock

Rp194.468

Rp179.974

Rp179.791

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M3

32 bit

120 MHz

1 MB

128 kB

12 bit

82 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU 32-Bit ARM Cortex M4 72MHz 128kB MCU FPU

STM32F373VBH6
STMicroelectronics
1: Rp160.894
1.175In Stock

Mfr. Part No.
STM32F373VBH6

Mouser Part No
511-STM32F373VBH6

STMicroelectronics

ARM Microcontrollers - MCU 32-Bit ARM Cortex M4 72MHz 128kB MCU FPU

Learn More

Datasheet

1.175In Stock

Rp160.894

Rp124.753

Rp113.011

Rp105.856

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

BGA-100

ARM Cortex M4

32 bit

72 MHz

128 kB

24 kB

16 bit

- 40 C

+ 85 C

ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 32 Kbytes of Flash , 32 MHz CPU, USB, LCD

STM32L053C6T7
STMicroelectronics
1: Rp80.539
1.456In Stock

Mfr. Part No.
STM32L053C6T7

Mouser Part No
511-STM32L053C6T7

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 32 Kbytes of Flash , 32 MHz CPU, USB, LCD

Learn More

Datasheet

1.456In Stock

Rp80.539

Rp53.203

Rp45.865

Rp41.095

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M0+

32 bit

32 MHz

32 kB

8 kB

12 bit

37 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 1 Mbyte Flash USB OTG LCD

STM32L4A6VGT6TR
STMicroelectronics
1: Rp238.498
709In Stock

Mfr. Part No.
STM32L4A6VGT6TR

Mouser Part No
511-STM32L4A6VGT6TR

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 1 Mbyte Flash USB OTG LCD

Datasheet

709In Stock

Cut Tape

Rp238.498

Rp181.258

Rp173.737

Rp153.006

View

Reel

Rp115.396

MouseReel Available

Min.: 1
Mult.: 1

: 1.000

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M4

32 bit

80 MHz

1 MB

320 kB

12 bit

83 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

ARM Microcontrollers - MCU Sub-GHz Wireless Microcontrollers. Arm Cortex-M4 a.48 MHz 64 Kbytes of Flash 20 K

STM32WLE5J8I6
STMicroelectronics
1: Rp134.109
2.800In Stock

Mfr. Part No.
STM32WLE5J8I6

Mouser Part No
511-STM32WLE5J8I6

STMicroelectronics

ARM Microcontrollers - MCU Sub-GHz Wireless Microcontrollers. Arm Cortex-M4 a.48 MHz 64 Kbytes of Flash 20 K

Learn More

Datasheet

2.800In Stock

Rp134.109

Rp108.975

Rp104.205

Rp95.032

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

STMicroelectronics Embedded Processors & Controllers

Types of Embedded Processors & Controllers

Customer Service Office

Company

Resources

Support

BGA-100
BGA-132
BGA-144
BGA-168
BGA-169
BGA-176
BGA-216
BGA-292
BGA-64
BGA-73
CSP-100
CSP-115
CSP-36
CSP-48
CSP-64
CSP-72
CSP-81
FPBGA-292
FPBGA-302
FPBGA-386

ARM1176JZ-F
ARM Cortex-A35
ARM Cortex A35, ARM Cortex M33
ARM Cortex A7
ARM Cortex A7, ARM Cortex M4
ARM Cortex M0
ARM Cortex-M0, ARM Cortex-M4
ARM Cortex M0+
ARM Cortex M0+, ARM Cortex M4
ARM Cortex M3
ARM Cortex M33
ARM Cortex M33, ARM Cortex A35
ARM Cortex M35P
ARM Cortex M4
ARM Cortex M4, ARM Cortex M7
ARM Cortex M4F
ARM Cortex M55
ARM Cortex M7
ARM Cortex-R52+
e200z0

8 MHz
15 MHz
16 MHz
16 MHz/32 MHz
20 MHz
24 MHz
32 MHz
32 MHz, 64 MHz
36 MHz
48 MHz
56 MHz
64 MHz
72 MHz
80 MHz
80 MHz, 120 MHz
80 MHz, 160 MHz
84 MHz
96 MHz
100 MHz
110 MHz

0 B
1 KB
2 kB
4 kB
8 kB
16 kB
32 kB
64 kB
96 kB
128 KB
128 kB
160 kB
176 kB
192 kB
256 kB
320 kB
384 kB
512 kB
640 kB
768 kB

384 B
512 B
1 kB
1.5 kB
2 kB
4 kB
6 kB
8 kB
10 kB
12 kB
16 KB
16 kB
18 kB
20 kB
22 kB
24 kB
32 KB
32 kB
36 kB
40 kB

2 x 10 bit
2 x 10 bit, 5 x 12 bit, 6 x 16 bit
2 x 12 bit
2 x 16 bit
2 x 6 bit/8 bit/10 bit/12 bit
2 x 8 bit/10 bit/12 bit
3 x 10 bit, 5 x 12 bit, 6 x 16 bit
3 x 12 bit
3 x 12 bit, 1 x 16 bit
3 x 16 bit
4 x 12 bit
4 x 6 bit/8 bit/10 bit/12 bit
5 x 12 bit
5 x 12 bit, 2 x 16 bit
6 bit/8 bit/10 bit/12 bit
8 bit to 16 bit
10 bit
10 bit, 12 bit
10 bit, 3 x 12 bit
10 bit, 4 x 12 bit

5 I/O
6 I/O
8 I/O
9 I/O
10 I/O
11 I/O
14 I/O
15 I/O
16 I/O
17 I/O
18 I/O
19 I/O
20 I/O
21 I/O
22 I/O
23 I/O
24 I/O
25 I/O
26 I/O
27 I/O