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8051 microcontroller Embedded Processors & Controllers

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Part #

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F16I-D-5QFN32
Silicon Labs
1: $2.00
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F16I-D-5QFN32

Mouser Part No
634-EF8BB31F16ID5F32

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.00

$1.48

$1.35

$1.20

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F32G-D-QFN24
Silicon Labs
1: $2.03
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F32G-D-QFN24

Mouser Part No
634-EF8BB31F32GDQF24

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.03

$1.50

$1.37

$1.22

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

32 kB

2.3 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F32G-D-QFN32R
Silicon Labs
1: $2.20
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F32G-D-QFN32R

Mouser Part No
634-EF8BB31F32GDN32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

Cut Tape

$2.20

$1.62

$1.48

$1.32

Reel

$1.17

View

Min.: 1
Mult.: 1

: 2,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

32 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 85 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

EFM8SB20F64G-B-QFN32R
Silicon Labs
1: $3.17
Non-Stocked Lead-Time 20 Weeks
End of Life

Mfr. Part No.
EFM8SB20F64G-B-QFN32R

Mouser Part No
634-EFM8SB64GBQFN32R

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Cut Tape

$3.17

$2.37

$2.17

$1.94

$1.93

Reel

$1.92

Min.: 1
Mult.: 1

: 1,500

8-bit Microcontrollers - MCU

Reel, Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F4I-A-QFN12
Silicon Labs
1: $0.81
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4I-A-QFN12

Mouser Part No
634-M8BB50F4IAQFN12

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$0.81

$0.624

$0.554

$0.49

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-12

8 bit

50 MHz

4 kB

512 B

12 bit

9 I/O

- 40 C

+ 125 C

Cut Tape

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F16A-D-5QFN32
Silicon Labs
1,533: $2.07
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F16A-D-5QFN32

Mouser Part No
634-EF8BB31F16AD5F32

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.07

$2.02

$2.00

Min.: 1,533
Mult.: 1,533

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F16A-D-5QFN32R
Silicon Labs
1,500: $2.03
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F16A-D-5QFN32R

Mouser Part No
634-EF8BB31F16AD532R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

Reel

$2.03

$2.01

Min.: 1,500
Mult.: 1,500

: 1,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Reel

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F32E-C-QFN32R
Silicon Labs
2,500: $1.51
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB11F32E-C-QFN32R

Mouser Part No
634-LB11F32ECQFN32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Reel

$1.51

Min.: 2,500
Mult.: 2,500

: 2,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

32 kB

2.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Reel

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F16E-C-QFP32R
Silicon Labs
1: $2.85
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB11F16E-C-QFP32R

Mouser Part No
634-LB11F16ECQFP32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Cut Tape

$2.85

$2.12

$1.94

$1.74

Reel

$1.66

View

Min.: 1
Mult.: 1

: 500

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

28 I/O

- 40 C

+ 105 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F16E-C-QFN32R
Silicon Labs
2,500: $1.29
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB11F16E-C-QFN32R

Mouser Part No
634-LB11F16ECQFN32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Reel

$1.29

$1.28

Min.: 2,500
Mult.: 2,500

: 2,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Reel

8-bit Microcontrollers - MCU Low Pin Count 8051 Series; 2.4V to 5.5V; -40 to 85

N76E616AL48
Nuvoton
500: $0.883
Non-Stocked Lead-Time 40 Weeks
Verify Status with Factory

Mfr. Part No.
N76E616AL48

Mouser Part No
503-N76E616AL48

Verify Status with Factory

Nuvoton

8-bit Microcontrollers - MCU Low Pin Count 8051 Series; 2.4V to 5.5V; -40 to 85

Datasheet

Non-Stocked Lead-Time 40 Weeks

$0.883

$0.78

$0.753

Min.: 500
Mult.: 250

8-bit Microcontrollers - MCU

SMD/SMT

LQFP-48

8051

8 bit

16 MHz

18 kB

256 B

10 bit

46 I/O

- 40 C

+ 105 C

Tray

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

EFM8LB12F32E-C-QFN32
Silicon Labs
2,450: $1.65
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB12F32E-C-QFN32

Mouser Part No
634-LB12F32ECQFN32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

$1.65

$1.64

Min.: 2,450
Mult.: 2,450

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

32 kB

2.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Tray

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F32E-C-QFP32
Silicon Labs
1,250: $1.81
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB11F32E-C-QFP32

Mouser Part No
634-LB11F32ECQFP32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

$1.81

$1.77

$1.75

Min.: 1,250
Mult.: 1,250

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

72 MHz

32 kB

2.25 kB

10 bit/12 bit/14 bit

28 I/O

- 40 C

+ 105 C

Tray

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F32A-D-5QFN32
Silicon Labs
1,533: $2.13
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F32A-D-5QFN32

Mouser Part No
634-EF8BB31F32AD5F32

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.13

$2.09

$2.07

Min.: 1,533
Mult.: 1,533

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

32 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F16A-D-4QFN24R
Silicon Labs
1,500: $1.83
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F16A-D-4QFN24R

Mouser Part No
634-EF8BB31F16AD424R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

Reel

$1.83

$1.81

Min.: 1,500
Mult.: 1,500

: 1,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 125 C

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F64A-D-5QFN32
Silicon Labs
1,533: $2.40
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F64A-D-5QFN32

Mouser Part No
634-EF8BB31F64AD5F32

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.40

$2.36

Min.: 1,533
Mult.: 1,533

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F16I-D-5QFN32R
Silicon Labs
1: $2.00
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F16I-D-5QFN32R

Mouser Part No
634-EF8BB31F16ID532R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

Cut Tape

$2.00

$1.48

$1.35

$1.20

Reel

$1.08

View

Min.: 1
Mult.: 1

: 1,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB10F16E-C-QFN32R
Silicon Labs
2,500: $1.18
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB10F16E-C-QFN32R

Mouser Part No
634-LB10F16ECQFN32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Reel

$1.18

Min.: 2,500
Mult.: 2,500

: 2,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Reel

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB10F16E-C-QFP32R
Silicon Labs
1: $2.67
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB10F16E-C-QFP32R

Mouser Part No
634-LB10F16ECQFP32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

Cut Tape

$2.67

$1.98

$1.81

$1.62

Reel

$1.53

View

Min.: 1
Mult.: 1

: 500

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

28 I/O

- 40 C

+ 105 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F16E-C-QFN32
Silicon Labs
2,450: $1.30
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8LB11F16E-C-QFN32

Mouser Part No
634-LB11F16ECQFN32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

$1.30

$1.28

Min.: 2,450
Mult.: 2,450

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Tray

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

EFM8SB10F8A-A-QFN20
Silicon Labs
1: $3.31
Non-Stocked Lead-Time 20 Weeks
End of Life

Mfr. Part No.
EFM8SB10F8A-A-QFN20

Mouser Part No
634-FM8SB10F8AAQFN20

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 20 Weeks

$3.31

$2.61

$2.49

$2.36

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

AEC-Q100

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB22F16I-C-QFN28R
Silicon Labs
1,500: $1.25
Non-Stocked Lead-Time 31 Weeks

Mfr. Part No.
EFM8BB22F16I-C-QFN28R

Mouser Part No
634-8BB22F16ICQFN28R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 31 Weeks

Reel

$1.25

Min.: 1,500
Mult.: 1,500

: 1,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-28

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

12 bit

22 I/O

- 40 C

+ 125 C

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F32A-D-5QFN32R
Silicon Labs
1,500: $2.09
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F32A-D-5QFN32R

Mouser Part No
634-EF8BB31F32AD532R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

Reel

$2.09

$2.07

Min.: 1,500
Mult.: 1,500

: 1,500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

32 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F16A-D-4QFN24
Silicon Labs
1: $3.31
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F16A-D-4QFN24

Mouser Part No
634-EF8BB31F16AD4F24

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$3.31

$2.47

$2.26

$2.03

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 125 C

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F64I-D-QFN24
Silicon Labs
1: $2.77
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
EFM8BB31F64I-D-QFN24

Mouser Part No
634-EF8BB31F64IDQF24

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 16 Weeks

$2.77

$2.06

$1.89

$1.69

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 125 C

Tube

8051 microcontroller Embedded Processors & Controllers

Types of Embedded Processors & Controllers

Customer Service Office

Company

Resources

Support

CSP-16
DFN-10
LQFP-32
LQFP-44
LQFP-48
LQFP-80
PDIP-14
PDIP-20
PDIP-40
PLCC-44
PQFP-48
QFN-11
QFN-12
QFN-16
QFN-20
QFN-24
QFN-28
QFN-32
QFN-36
QFN-40

128 B
256 B
512 B
768 B
1 kB
1.25 kB
1.28 kB
1.54 kB
2 kB
2.25 kB
2.3 kB
2.31 kB
3.25 kB
4 kB
4.25 kB
4.35 kB
8 kB
8.25 kB
16 kB
32 kB

6 I/O
8 I/O
9 I/O
11 I/O
12 I/O
13 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
24 I/O
25 I/O
28 I/O
29 I/O
31 I/O
32 I/O