.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: 5.588

Applied Filters:

Manufacturer = 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; }

Download Table (.CSV)

Part #

ARM Microcontrollers - MCU Entry-level ARM Cortex-M0 MCU

STM32F031F6P7
STMicroelectronics
1: 3,39 €
1.295In Stock

Mfr. Part No.
STM32F031F6P7

Mouser Part No
511-STM32F031F6P7

STMicroelectronics

ARM Microcontrollers - MCU Entry-level ARM Cortex-M0 MCU

Learn More

Datasheet

1.295In Stock

3,39 €

2,30 €

2,12 €

1,85 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

TSSOP-20

ARM Cortex M0

32 bit

48 MHz

32 kB

4 kB

12 bit

15 I/O

- 40 C

+ 105 C

Tube

ARM Microcontrollers - MCU Mainstream Arm Cortex-M0 Value line MCU up to 32 Kbytes of Flash 48 MHz CPU, USB

STM32F070C6T6
STMicroelectronics
1: 3,10 €
1.492In Stock
1.500On Order

Mfr. Part No.
STM32F070C6T6

Mouser Part No
511-STM32F070C6T6

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M0 Value line MCU up to 32 Kbytes of Flash 48 MHz CPU, USB

Learn More

Datasheet

1.492In Stock

1.500On Order

3,10 €

2,10 €

1,94 €

1,69 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M0

32 bit

48 MHz

32 kB

6 kB

12 bit

37 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Mainstream Arm Cortex-M0 Value line MCU up to 32 Kbytes of Flash 48 MHz CPU, USB

STM32F070F6P6TR
STMicroelectronics
1: 2,06 €
3.760In Stock

Mfr. Part No.
STM32F070F6P6TR

Mouser Part No
511-STM32F070F6P6TR

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M0 Value line MCU up to 32 Kbytes of Flash 48 MHz CPU, USB

Learn More

Datasheet

3.760In Stock

Cut Tape

2,06 €

1,41 €

1,26 €

1,11 €

View

Reel

0,771 €

Min.: 1
Mult.: 1

Reel: 2.500

ARM Microcontrollers - MCU

SMD/SMT

ARM Cortex M0

32 bit

48 MHz

32 kB

6 kB

12 bit

15 I/O

- 40 C

+ 85 C

Reel, Cut Tape

ARM Microcontrollers - MCU Mainstream Arm Cortex-M0 Access line MCU 128 Kbytes of Flash 48 MHz CPU, CAN & C

STM32F091CBU6
STMicroelectronics
1: 5,50 €
4.811In Stock

Mfr. Part No.
STM32F091CBU6

Mouser Part No
511-STM32F091CBU6

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M0 Access line MCU 128 Kbytes of Flash 48 MHz CPU, CAN & C

Learn More

Datasheet

4.811In Stock

5,50 €

3,78 €

3,53 €

3,10 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFQFPN-48

ARM Cortex M0

32 bit

48 MHz

128 kB

32 kB

12 bit

38 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU 32BIT Cortex M3 L/D PERF LINE 32KB

STM32F103C4T6A
STMicroelectronics
1: 5,82 €
918In Stock

Mfr. Part No.
STM32F103C4T6A

Mouser Part No
511-STM32F103C4T6A

STMicroelectronics

ARM Microcontrollers - MCU 32BIT Cortex M3 L/D PERF LINE 32KB

Learn More

Datasheet

918In Stock

5,82 €

4,27 €

3,98 €

3,51 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M3

32 bit

72 MHz

16 kB

6 kB

12 bit

37 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU 32BIT Cortex M3 L/D Performance LINE

STM32F103R6T7A
STMicroelectronics
1: 6,84 €
1.679In Stock

Mfr. Part No.
STM32F103R6T7A

Mouser Part No
511-STM32F103R6T7A

STMicroelectronics

ARM Microcontrollers - MCU 32BIT Cortex M3 L/D Performance LINE

Learn More

Datasheet

1.679In Stock

6,84 €

4,78 €

4,56 €

3,96 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M3

32 bit

72 MHz

32 kB

10 kB

12 bit

51 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU 32BIT Cortex M3 M/D Performance LINE

STM32F103R8T7
STMicroelectronics
1: 7,59 €
636In Stock

Mfr. Part No.
STM32F103R8T7

Mouser Part No
511-STM32F103R8T7

STMicroelectronics

ARM Microcontrollers - MCU 32BIT Cortex M3 M/D Performance LINE

Learn More

Datasheet

636In Stock

7,59 €

5,31 €

5,07 €

4,39 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M3

32 bit

72 MHz

64 kB

20 kB

12 bit

51 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU 32BIT Cortex M3 FL PERFORMANCE LINE

STM32F103T8U6
STMicroelectronics
1: 6,95 €
3.209In Stock

Mfr. Part No.
STM32F103T8U6

Mouser Part No
511-STM32F103T8U6

STMicroelectronics

ARM Microcontrollers - MCU 32BIT Cortex M3 FL PERFORMANCE LINE

Learn More

Datasheet

3.209In Stock

6,95 €

5,10 €

4,76 €

4,18 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFQFPN-36

ARM Cortex M3

32 bit

72 MHz

64 kB

20 kB

12 bit

26 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 260 to 512 USB/CAN

STM32F103VDT6
STMicroelectronics
1: 9,85 €
2.050In Stock

Mfr. Part No.
STM32F103VDT6

Mouser Part No
511-STM32F103VDT6

STMicroelectronics

ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 260 to 512 USB/CAN

Learn More

Datasheet

2.050In Stock

9,85 €

7,65 €

7,30 €

6,34 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M3

32 bit

72 MHz

384 kB

64 kB

12 bit

80 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 262 to 512 USB/CAN

STM32F103ZDT6
STMicroelectronics
1: 11,07 €
298In Stock

Mfr. Part No.
STM32F103ZDT6

Mouser Part No
511-STM32F103ZDT6

STMicroelectronics

ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 262 to 512 USB/CAN

Learn More

Datasheet

298In Stock

11,07 €

8,41 €

8,07 €

7,10 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-144

ARM Cortex M3

32 bit

72 MHz

384 kB

64 kB

12 bit

112 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Mainstream Connectivity line, Arm Cortex-M3 64 Kbytes of Flash 72 MHz CPU, CAN,

STM32F105R8T6TR
STMicroelectronics
1: 7,19 €
2.907In Stock

Mfr. Part No.
STM32F105R8T6TR

Mouser Part No
511-STM32F105R8T6TR

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Connectivity line, Arm Cortex-M3 64 Kbytes of Flash 72 MHz CPU, CAN,

Learn More

Datasheet

2.907In Stock

Cut Tape

7,19 €

5,02 €

4,79 €

4,16 €

View

Reel

3,21 €

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1.000

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M3

32 bit

72 MHz

64 kB

96 kB

12 bit

51 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 128kB

STM32F205ZCT6
STMicroelectronics
1: 9,06 €
322In Stock

Mfr. Part No.
STM32F205ZCT6

Mouser Part No
511-STM32F205ZCT6

STMicroelectronics

ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 128kB

Learn More

Datasheet

322In Stock

9,06 €

7,48 €

7,10 €

6,69 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-144

ARM Cortex M3

32 bit

120 MHz

256 kB

96 kB

12 bit

114 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 768kB

STM32F205ZFT6
STMicroelectronics
1: 12,37 €
369In Stock
360On Order

Mfr. Part No.
STM32F205ZFT6

Mouser Part No
511-STM32F205ZFT6

STMicroelectronics

ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 768kB

Learn More

Datasheet

369In Stock

360On Order

12,37 €

9,92 €

8,98 €

8,39 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-144

ARM Cortex M3

32 bit

120 MHz

768 kB

128 kB

12 bit

114 I/O

- 40 C

+ 85 C

Tray

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

STM32F217IET6
STMicroelectronics
1: 13,67 €
1.169In Stock

Mfr. Part No.
STM32F217IET6

Mouser Part No
511-STM32F217IET6

STMicroelectronics

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

Learn More

Datasheet

1.169In Stock

13,67 €

11,69 €

11,43 €

10,56 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-176

ARM Cortex M3

32 bit

120 MHz

512 kB

128 kB

12 bit

140 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 256 Kbytes of Flash

STM32F302RCT7
STMicroelectronics
1: 8,29 €
865In Stock

Mfr. Part No.
STM32F302RCT7

Mouser Part No
511-STM32F302RCT7

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 256 Kbytes of Flash

Learn More

Datasheet

865In Stock

8,29 €

6,22 €

5,93 €

5,14 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

Tray

ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 256 Kbytes of Flash

STM32F302VCT6TR
STMicroelectronics
1: 7,10 €
495In Stock

Mfr. Part No.
STM32F302VCT6TR

Mouser Part No
511-STM32F302VCT6TR

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 256 Kbytes of Flash

Learn More

Datasheet

495In Stock

Cut Tape

7,10 €

5,50 €

5,11 €

4,67 €

View

Reel

4,14 €

Min.: 1
Mult.: 1

Reel: 1.000

ARM Microcontrollers - MCU

SMD/SMT

ARM Cortex M4

32 bit

72 MHz

256 kB

40 kB

2 x 6 bit/8 bit/10 bit/12 bit

87 I/O

- 40 C

+ 85 C

Reel, Cut Tape

ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 64 Kbytes of Flash 7

STM32F334C8T7
STMicroelectronics
1: 5,79 €
1.101In Stock

Mfr. Part No.
STM32F334C8T7

Mouser Part No
511-STM32F334C8T7

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Mixed signals MCUs Arm Cortex-M4 core DSP & FPU, 64 Kbytes of Flash 7

Learn More

Datasheet

1.101In Stock

5,79 €

4,46 €

4,13 €

3,76 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

LQFP-48

ARM Cortex M4

32 bit

72 MHz

64 kB

12 kB

2 x 6 bit/8 bit/10 bit/12 bit

37 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU High-performance access line, Arm Cortex-M4 core DSP & FPU, 256 Kbytes of Flash

STM32F401RCT7TR
STMicroelectronics
1: 4,90 €
520In Stock

Mfr. Part No.
STM32F401RCT7TR

Mouser Part No
511-STM32F401RCT7TR

STMicroelectronics

ARM Microcontrollers - MCU High-performance access line, Arm Cortex-M4 core DSP & FPU, 256 Kbytes of Flash

Learn More

Datasheet

520In Stock

Cut Tape

4,90 €

3,75 €

3,47 €

3,15 €

Reel

2,73 €

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1.000

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M4

32 bit

84 MHz

256 kB

64 kB

12 bit

50 I/O

- 40 C

+ 105 C

Reel, Cut Tape, MouseReel

ARM Microcontrollers - MCU High-performance foundation line, Arm Cortex-M4 core DSP & FPU, 1 Mbyte of Flash

STM32F407IGT7
STMicroelectronics
1: 12,57 €
651In Stock

Mfr. Part No.
STM32F407IGT7

Mouser Part No
511-STM32F407IGT7

STMicroelectronics

ARM Microcontrollers - MCU High-performance foundation line, Arm Cortex-M4 core DSP & FPU, 1 Mbyte of Flash

Learn More

Datasheet

651In Stock

12,57 €

9,94 €

9,00 €

8,48 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-176

ARM Cortex M4

32 bit

168 MHz

1 MB

192 kB

12 bit

140 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU STM32 Dynamic Efficiency MCU BAM, High-performance & DSP FPU, Arm Cortex-M4 MCU

STM32F410RBI6
STMicroelectronics
1: 5,23 €
7.740In Stock

Mfr. Part No.
STM32F410RBI6

Mouser Part No
511-STM32F410RBI6

STMicroelectronics

ARM Microcontrollers - MCU STM32 Dynamic Efficiency MCU BAM, High-performance & DSP FPU, Arm Cortex-M4 MCU

Learn More

Datasheet

7.740In Stock

5,23 €

3,59 €

3,35 €

2,95 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFBGA-64

ARM Cortex M4

32 bit

100 MHz

128 kB

32 kB

12 bit

50 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance access line, Arm Cortex-M4 core DSP & FPU, 1,5 MByte of Flash 1

STM32F423ZHJ6
STMicroelectronics
1: 11,40 €
1.077In Stock

Mfr. Part No.
STM32F423ZHJ6

Mouser Part No
511-STM32F423ZHJ6

STMicroelectronics

ARM Microcontrollers - MCU High-performance access line, Arm Cortex-M4 core DSP & FPU, 1,5 MByte of Flash 1

Learn More

Datasheet

1.077In Stock

11,40 €

8,80 €

8,32 €

7,48 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFBGA-144

ARM Cortex M4

32 bit

100 MHz

1.5 MB

320 kB

12 bit

144 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance advanced line, Arm Cortex-M4 core DSP & FPU, 2 Mbytes of Flash

STM32F439BIT6
STMicroelectronics
1: 12,99 €
396In Stock

Mfr. Part No.
STM32F439BIT6

Mouser Part No
511-STM32F439BIT6

STMicroelectronics

ARM Microcontrollers - MCU High-performance advanced line, Arm Cortex-M4 core DSP & FPU, 2 Mbytes of Flash

Learn More

Datasheet

396In Stock

12,99 €

11,03 €

10,43 €

9,82 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-208

ARM Cortex M4

32 bit

180 MHz

2 MB

256 kB

3 x 12 bit

168 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance foundation line, Arm Cortex-M4 core DSP & FPU, 512 Kbytes of Fl

STM32F446ZEJ7TR
STMicroelectronics
1: 10,60 €
290In Stock

Mfr. Part No.
STM32F446ZEJ7TR

Mouser Part No
511-STM32F446ZEJ7TR

STMicroelectronics

ARM Microcontrollers - MCU High-performance foundation line, Arm Cortex-M4 core DSP & FPU, 512 Kbytes of Fl

Learn More

Datasheet

290In Stock

Cut Tape

10,60 €

8,63 €

8,22 €

7,14 €

View

Reel

5,38 €

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1.500

ARM Microcontrollers - MCU

SMD/SMT

UFBGA-144

ARM Cortex M4

32 bit

180 MHz

512 kB

128 kB

3 x 12 bit

114 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

ARM Microcontrollers - MCU High-performance advanced line, Arm Cortex-M4 core DSP & FPU, 2 Mbytes of Flash

STM32F469IIH6
STMicroelectronics
1: 15,24 €
727In Stock

Mfr. Part No.
STM32F469IIH6

Mouser Part No
511-STM32F469IIH6

STMicroelectronics

ARM Microcontrollers - MCU High-performance advanced line, Arm Cortex-M4 core DSP & FPU, 2 Mbytes of Flash

Learn More

Datasheet

727In Stock

15,24 €

11,81 €

11,19 €

9,34 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

BGA-176

ARM Cortex M4

32 bit

180 MHz

2 MB

384 kB

3 x 12 bit

131 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance & DSP FPU, Arm Cortex-M7 MCU 1 Mbyte of Flash 216 MHz CPU, Art

STM32F746IGT7
STMicroelectronics
1: 17,36 €
355In Stock

Mfr. Part No.
STM32F746IGT7

Mouser Part No
511-STM32F746IGT7

STMicroelectronics

ARM Microcontrollers - MCU High-performance & DSP FPU, Arm Cortex-M7 MCU 1 Mbyte of Flash 216 MHz CPU, Art

Learn More

Datasheet

355In Stock

17,36 €

13,86 €

12,99 €

12,03 €

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-176

ARM Cortex M7

32 bit

216 MHz

1 MB

320 kB

3 x 12 bit

140 I/O

- 40 C

+ 105 C

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 M33, ARM Cortex A35
ARM Cortex M35P
ARM Cortex M4
ARM Cortex M4, ARM Cortex M0+
ARM Cortex M4, ARM Cortex M7
ARM Cortex M4F
ARM Cortex M55
ARM Cortex M7

8 MHz
15 MHz
16 MHz
16 MHz/32 MHz
20 MHz
24 MHz
32 MHz
36 MHz
48 MHz
56 MHz
64 MHz
64 MHz, 32 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
64 kB
96 kB
128 KB
128 kB
160 kB
176 kB
192 kB
256 KB
256 kB
320 kB
384 kB
512 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