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

ARM Cortex M33 Core Embedded Processors & Controllers

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

Types of Embedded Processors & Controllers

List Images

Results: 1,545

Applied Filters:

Core = ARM Cortex M33

Manufacturer

Product Type

Mounting Style

Package / Case

Data Bus Width

Maximum Clock Frequency

Program Memory Size

Data RAM Size

ADC Resolution

Number of I/Os

Minimum Operating Temperature

Maximum Operating Temperature

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 #

RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 352kB, 32kB(RAM), 18 GPIO

EFR32BG22C222F352GM32-CR
Silicon Labs
1: $5.73
2,515In Stock
2,500On Order

Mfr. Part #
EFR32BG22C222F352GM32-CR

Mouser Part #
634-ER32BG22352GM3CR

Silicon Labs

RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 6dB, Bluetooth 5.2, 352kB, 32kB(RAM), 18 GPIO

Learn More

Datasheet

2,515In Stock

2,500On Order

Cut Tape

$5.73

$3.89

$3.60

$3.13

Reel

$1.98

View

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

QFN-32

ARM Cortex M33

32 bit

76.8 MHz

352 kB

32 kB

12 bit

18 I/O

- 40 C

+ 85 C

Reel, Cut Tape

RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 20dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO

EFR32BG21B020F512IM32-BR
Silicon Labs
1: $10.93
2,569In Stock

Mfr. Part #
EFR32BG21B020F512IM32-BR

Mouser Part #
634-32BG21B2012M32BR

Silicon Labs

RF System on a Chip - SoC Blue Gecko, QFN32, 2.4G, 20dB, Bluetooth 5.1, 512kB, 64kB(RAM), 20 GPIO

Learn More

Datasheet

2,569In Stock

Cut Tape

$10.93

$8.04

$7.49

$6.59

View

Reel

$4.50

MouseReel Available

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

QFN-32

ARM Cortex M33

32 bit

80 MHz

512 kB

64 kB

12 bit

20 I/O

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

RF System on a Chip - SoC FG23, Sub-GHz, 256kB Flash, 32kB RAM, +14 dBm, QFN48

EFR32FG23A010F256GM48-C
Silicon Labs
1: $8.80
2,422In Stock
2,442On Order

Mfr. Part #
EFR32FG23A010F256GM48-C

Mouser Part #
634-FG2310F256GM48C

Silicon Labs

RF System on a Chip - SoC FG23, Sub-GHz, 256kB Flash, 32kB RAM, +14 dBm, QFN48

Learn More

Datasheet

2,422In Stock

2,442On Order

$8.80

$7.49

$6.45

$5.83

View

Min.: 1
Mult.: 1

RF System on a Chip - SoC

SMD/SMT

QFN-48

ARM Cortex M33

32 bit

78 MHz

256 kB

32 kB

12 bit, 16 bit

31 I/O

- 40 C

+ 85 C

Tray

RF System on a Chip - SoC ZG23, Sub-GHz, 512kB Flash, 64kB RAM, +20 dBm, Secure Vault-High, +125C, QFN40

EFR32ZG23B020F512IM40-CR
Silicon Labs
1: $15.39
3,190In Stock

Mfr. Part #
EFR32ZG23B020F512IM40-CR

Mouser Part #
634-ZG2320F512IM40CR

Silicon Labs

RF System on a Chip - SoC ZG23, Sub-GHz, 512kB Flash, 64kB RAM, +20 dBm, Secure Vault-High, +125C, QFN40

Learn More

Datasheet

3,190In Stock

Cut Tape

$15.39

$11.90

$11.35

$9.85

View

Reel

$7.34

MouseReel Available

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

QFN-40

ARM Cortex M33

32 bit

78 MHz

512 kB

64 kB

12 bit, 16 bit

23 I/O

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

RF System on a Chip - SoC ZG23, Sub-GHz, 512kB Flash, 64kB RAM, +20 dBm, Secure Vault-High, +125C, QFN48

EFR32ZG23B020F512IM48-CR
Silicon Labs
1: $15.43
2,011In Stock

Mfr. Part #
EFR32ZG23B020F512IM48-CR

Mouser Part #
634-ZG2320F512IM48CR

Silicon Labs

RF System on a Chip - SoC ZG23, Sub-GHz, 512kB Flash, 64kB RAM, +20 dBm, Secure Vault-High, +125C, QFN48

Learn More

Datasheet

2,011In Stock

Cut Tape

$15.43

$11.93

$11.38

$9.88

View

Reel

$7.37

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

QFN-48

ARM Cortex M33

32 bit

78 MHz

512 kB

64 kB

12 bit, 16 bit

31 I/O

- 40 C

+ 125 C

Reel, Cut Tape

RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO

EFR32MG21B020F1024IM32-BR
Silicon Labs
1: $8.45
695In Stock

Mfr. Part #
EFR32MG21B020F1024IM32-BR

Mouser Part #
634-2MG21B20024M32BR

Silicon Labs

RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO

Learn More

Datasheet

695In Stock

Cut Tape

$8.45

$7.32

$6.92

$6.37

View

Reel

$4.79

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

QFN-32

ARM Cortex M33

32 bit

80 MHz

1 MB

96 kB

20 I/O

- 40 C

+ 125 C

Reel, Cut Tape

RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO

EFR32MG21B020F1024IM32-B
Silicon Labs
1: $10.02
2,302In Stock

Mfr. Part #
EFR32MG21B020F1024IM32-B

Mouser Part #
634-32MG21B20024M32B

Silicon Labs

RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 1024kB, 96kB(RAM), 20 GPIO

Learn More

Datasheet

2,302In Stock

$10.02

$7.91

$7.43

$6.68

View

Min.: 1
Mult.: 1

RF System on a Chip - SoC

SMD/SMT

QFN-32

ARM Cortex M33

32 bit

80 MHz

1 MB

96 kB

20 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU ARM Cortex-M33 32-bit 76 MHz 256 kB AES MCU

EFM32PG22C200F256IM40-C
Silicon Labs
1: $3.07
2,624In Stock

Mfr. Part #
EFM32PG22C200F256IM40-C

Mouser Part #
634-EFM32PG22C25640C

Silicon Labs

ARM Microcontrollers - MCU ARM Cortex-M33 32-bit 76 MHz 256 kB AES MCU

Learn More

Datasheet

2,624In Stock

$3.07

$2.59

$2.39

$2.04

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

QFN-40

ARM Cortex M33

32 bit

76.8 MHz

256 kB

32 kB

12 bit, 16 bit

26 I/O

- 40 C

+ 125 C

Tray

RF System on a Chip - SoC FG25, Sub-GHz, 1152kB Flash, 256kB RAM, FSK/O-QPSK, Secure Vault-High, +125C, QFN56

EFR32FG25B111F1152IM56-B
Silicon Labs
1: $14.61
256In Stock

Mfr. Part #
EFR32FG25B111F1152IM56-B

Mouser Part #
634-25B111F1152IM56B

Silicon Labs

RF System on a Chip - SoC FG25, Sub-GHz, 1152kB Flash, 256kB RAM, FSK/O-QPSK, Secure Vault-High, +125C, QFN56

Learn More

Datasheet

256In Stock

$14.61

$12.69

$12.02

$11.10

View

Min.: 1
Mult.: 1

RF System on a Chip - SoC

SMD/SMT

QFN-56

ARM Cortex M33

32 bit

97.5 MHz

1152 kB

256 kB

12 bit, 16 bit

- 40 C

+ 125 C

Tray

RF System on a Chip - SoC FG25, Sub-GHz, 1152kB Flash, 256kB RAM, FSK/O-QPSK/OFDM, Secure Vault-High, +125C, QFN56

EFR32FG25B121F1152IM56-B
Silicon Labs
1: $17.72
249In Stock

Mfr. Part #
EFR32FG25B121F1152IM56-B

Mouser Part #
634-25B121F1152IM56B

Silicon Labs

RF System on a Chip - SoC FG25, Sub-GHz, 1152kB Flash, 256kB RAM, FSK/O-QPSK/OFDM, Secure Vault-High, +125C, QFN56

Learn More

Datasheet

249In Stock

$17.72

$15.40

$14.59

$13.24

View

Min.: 1
Mult.: 1

RF System on a Chip - SoC

SMD/SMT

QFN-56

ARM Cortex M33

32 bit

97.5 MHz

1152 kB

256 kB

12 bit, 16 bit

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU ARM Cortex-M33 32-bit 80 MHz 256 kB AES MCU

EFM32PG23B200F256IM40-C
Silicon Labs
1: $4.24
4,677In Stock

Mfr. Part #
EFM32PG23B200F256IM40-C

Mouser Part #
634-PG23200F256IM40C

Silicon Labs

ARM Microcontrollers - MCU ARM Cortex-M33 32-bit 80 MHz 256 kB AES MCU

Learn More

Datasheet

4,677In Stock

$4.24

$3.55

$3.29

$2.36

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

QFN-40

ARM Cortex M33

32 bit

80 MHz

256 kB

64 kB

12 bit/16 bit/20 bit

29 I/O

- 40 C

+ 125 C

Tray

RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 512kB, 64kB(RAM), 20 GPIO

EFR32MG21B020F512IM32-B
Silicon Labs
1: $6.59
1,787In Stock

Mfr. Part #
EFR32MG21B020F512IM32-B

Mouser Part #
634-32MG21B20512M32B

Silicon Labs

RF System on a Chip - SoC Mighty Gecko, QFN32, 2.4G, 20dB, mesh multiprotocol, 512kB, 64kB(RAM), 20 GPIO

Learn More

Datasheet

1,787In Stock

$6.59

$5.70

$5.40

$4.97

View

Min.: 1
Mult.: 1

RF System on a Chip - SoC

SMD/SMT

QFN-32

ARM Cortex M33

32 bit

80 MHz

512 kB

64 kB

20 I/O

- 40 C

+ 125 C

Tray

RF System on a Chip - SoC Flex Gecko, QFN32, 2.4G, 6dB, Proprietary, 512kB, 32kB(RAM), 18 GPIO

EFR32FG22C121F512GM32-C
Silicon Labs
1: $4.80
1,867In Stock

Mfr. Part #
EFR32FG22C121F512GM32-C

Mouser Part #
634-ER32FG22512GM32C

Silicon Labs

RF System on a Chip - SoC Flex Gecko, QFN32, 2.4G, 6dB, Proprietary, 512kB, 32kB(RAM), 18 GPIO

Learn More

Datasheet

1,867In Stock

$4.80

$3.64

$3.43

$3.13

View

Min.: 1
Mult.: 1

RF System on a Chip - SoC

SMD/SMT

QFN-32

ARM Cortex M33

32 bit

38.4 MHz

512 kB

32 kB

18 I/O

- 40 C

+ 85 C

Tray

RF System on a Chip - SoC FG23, Sub-GHz, 256kB Flash, 32kB RAM, +20 dBm, QFN40

EFR32FG23A020F256GM40-CR
Silicon Labs
1: $10.84
3,952In Stock

Mfr. Part #
EFR32FG23A020F256GM40-CR

Mouser Part #
634-FG2320F256GM40CR

Silicon Labs

RF System on a Chip - SoC FG23, Sub-GHz, 256kB Flash, 32kB RAM, +20 dBm, QFN40

Learn More

Datasheet

3,952In Stock

Cut Tape

$10.84

$7.96

$7.41

$6.53

View

Reel

$4.48

MouseReel Available

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

QFN-40

ARM Cortex M33

32 bit

78 MHz

256 kB

32 kB

12 bit, 16 bit

23 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

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

STM32U585CIT6Q
STMicroelectronics
1: $16.94
1,183In Stock

Mfr. Part #
STM32U585CIT6Q

Mouser Part #
511-STM32U585CIT6Q

STMicroelectronics

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

Learn More

Datasheet

1,183In Stock

$16.94

$13.10

$12.49

$10.84

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M33

2 MB

2 kB

16 bit

14 I/O

- 40 C

+ 85 C

Tray

RF System on a Chip - SoC Next-gen SiP following QM35725

QM35825TR13
Qorvo
1: $20.80
2,562In Stock
3,000On Order
New Product

Mfr. Part #
QM35825TR13

Mouser Part #
772-QM35825TR13

New Product

Qorvo

RF System on a Chip - SoC Next-gen SiP following QM35725

Learn More

Datasheet

2,562In Stock

3,000On Order

Cut Tape

$20.80

$18.47

$17.02

$15.89

View

Reel

$11.36

Min.: 1
Mult.: 1

Reel: 3,000

RF System on a Chip - SoC

SMD/SMT

BGA-74

ARM Cortex M33

7.987 GHz

Reel, Cut Tape

RF System on a Chip - SoC Blue Gecko, TQFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO

EFR32BG22C224F512GN32-CR
Silicon Labs
1: $6.63
1,399In Stock

Mfr. Part #
EFR32BG22C224F512GN32-CR

Mouser Part #
634-ER32BG22512GN3CR

Silicon Labs

RF System on a Chip - SoC Blue Gecko, TQFN32, 2.4G, 6dB, Bluetooth 5.2, 512kB, 32kB(RAM), 18 GPIO

Learn More

Datasheet

1,399In Stock

Cut Tape

$6.63

$4.39

$4.00

$3.40

Reel

$2.30

View

Min.: 1
Mult.: 1

Reel: 2,500

RF System on a Chip - SoC

SMD/SMT

TQFN-32

ARM Cortex M33

32 bit

76.8 MHz

512 kB

32 kB

12 bit

18 I/O

- 40 C

+ 85 C

Reel, Cut Tape

ARM Microcontrollers - MCU LPC55S69JEV98

LPC55S69JEV98Y
NXP Semiconductors
1: $14.20
1,561In Stock

Mfr. Part #
LPC55S69JEV98Y

Mouser Part #
771-LPC55S69JEV98Y

NXP Semiconductors

ARM Microcontrollers - MCU LPC55S69JEV98

Learn More

Datasheet

1,561In Stock

Cut Tape

$14.20

$11.04

$10.25

$9.38

View

Reel

$7.98

Min.: 1
Mult.: 1

Reel: 2,000

ARM Microcontrollers - MCU

SMD/SMT

VFBGA-98

ARM Cortex M33

32 bit

150 MHz

640 kB

320 kB

16 bit

64 I/O

- 40 C

+ 105 C

Reel, Cut Tape

ARM Microcontrollers - MCU MCU RA4 ARM CM33 100MHz 384K/128K QFP64

R7FA4M2AC3CFM#AA0
Renesas Electronics
1: $6.48
2,708In Stock

Mfr. Part #
R7FA4M2AC3CFM#AA0

Mouser Part #
968-7FA4M2AC3CFM#AA0

Renesas Electronics

ARM Microcontrollers - MCU MCU RA4 ARM CM33 100MHz 384K/128K QFP64

Learn More

Datasheet

2,708In Stock

$6.48

$4.93

$4.53

$4.47

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M33

32 bit

100 MHz

384 kB

128 kB

12 bit

43 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU MCU RA4 ARM CM33 100MHz 768K/128K QFP144

R7FA4M3AE3CFB#AA0
Renesas Electronics
1: $11.61
1,029In Stock

Mfr. Part #
R7FA4M3AE3CFB#AA0

Mouser Part #
968-R7FA4M3AE3CFBAA0

Renesas Electronics

ARM Microcontrollers - MCU MCU RA4 ARM CM33 100MHz 768K/128K QFP144

Learn More

Datasheet

1,029In Stock

$11.61

$8.95

$7.56

$7.29

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M33

32 bit

100 MHz

768 kB

128 kB

12 bit

109 I/O

- 40 C

+ 105 C

Tray

RF System on a Chip - SoC Multi-core wireless MCU for Bluetooth 5.2 and proprietary 2G4 protocols

DA14691-00000HQ2
Renesas / Dialog
1: $12.69
3,965In Stock

Mfr. Part #
DA14691-00000HQ2

Mouser Part #
724-DA14691-00000HQ2

Renesas / Dialog

RF System on a Chip - SoC Multi-core wireless MCU for Bluetooth 5.2 and proprietary 2G4 protocols

Learn More

Datasheet

3,965In Stock

Cut Tape

$12.69

$10.52

$9.79

$8.89

View

Reel

$7.50

Min.: 1
Mult.: 1

Reel: 4,000

RF System on a Chip - SoC

SMD/SMT

VFBGA-86

ARM Cortex M33

32 bit

96 MHz

4 kB, 128 kB

384 kB

10 bit, 14 bit

44 I/O

- 40 C

+ 85 C

Reel, Cut Tape

RF System on a Chip - SoC Multi-core wireless MCU for Bluetooth 5.2 and proprietary 2G4 protocols

DA14697-00000HR2
Renesas / Dialog
1: $16.32
4,997In Stock

Mfr. Part #
DA14697-00000HR2

Mouser Part #
724-DA14697-00000HR2

Renesas / Dialog

RF System on a Chip - SoC Multi-core wireless MCU for Bluetooth 5.2 and proprietary 2G4 protocols

Learn More

Datasheet

4,997In Stock

Cut Tape

$16.32

$13.53

$12.61

$11.50

View

Reel

$9.46

Min.: 1
Mult.: 1

Reel: 5,000

RF System on a Chip - SoC

SMD/SMT

VFBGA-100

ARM Cortex M33

32 bit

96 MHz

4 kB, 128 kB

512 kB

10 bit, 14 bit

55 I/O

- 40 C

+ 85 C

Reel, Cut Tape

ARM Microcontrollers - MCU LPC5512JBD64

LPC5512JBD64E
NXP Semiconductors
1: $6.80
2,076In Stock

Mfr. Part #
LPC5512JBD64E

Mouser Part #
771-LPC5512JBD64E

NXP Semiconductors

ARM Microcontrollers - MCU LPC5512JBD64

Learn More

Datasheet

2,076In Stock

$6.80

$5.15

$4.76

$4.29

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

HTQFP-64

ARM Cortex M33

32 bit

150 MHz

64 kB

48 kB

16 bit

36 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU High Efficiency Arm Cortex-M33-based Microcontroller

LPC55S16JBD100Y
NXP Semiconductors
1: $11.90
642In Stock

Mfr. Part #
LPC55S16JBD100Y

Mouser Part #
771-LPC55S16JBD100Y

NXP Semiconductors

ARM Microcontrollers - MCU High Efficiency Arm Cortex-M33-based Microcontroller

Learn More

Datasheet

642In Stock

Cut Tape

$11.90

$9.20

$8.52

$7.78

Reel

$6.13

View

Min.: 1
Mult.: 1

Reel: 1,000

ARM Microcontrollers - MCU

SMD/SMT

HLQFP-100

ARM Cortex M33

32 bit

150 MHz

256 kB

96 kB

16 bit

64 I/O

- 40 C

+ 105 C

Reel, Cut Tape

ARM Microcontrollers - MCU MCU RA4 ARM CM33 100MHz 256K/128K QFP64

R7FA4M2AB3CFM#AA0
Renesas Electronics
1: $7.47
3,346In Stock

Mfr. Part #
R7FA4M2AB3CFM#AA0

Mouser Part #
968-7FA4M2AB3CFM#AA0

Renesas Electronics

ARM Microcontrollers - MCU MCU RA4 ARM CM33 100MHz 256K/128K QFP64

Learn More

Datasheet

3,346In Stock

$7.47

$5.69

$5.25

$4.62

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M33

32 bit

100 MHz

256 kB

128 kB

12 bit

43 I/O

- 40 C

+ 105 C

Tray

ARM Cortex M33 Core Embedded Processors & Controllers

Types of Embedded Processors & Controllers

Mouser Electronics®

Company

Resources

Support

BGA-136
BGA-144
BGA-36
BGA-64
BGA-74
CSP-BGA-81
FBGA-144
FBGA-176
FBGA-64
FCQFN-66
HDQFP-172
HLQFP-100
HTQFP-64
HVQFN-32
HVQFN-40
HVQFN-48
HWQFN-48
LFBGA-64
LFQFP-100
LFQFP-64

32 MHz
38.4 MHz
40 MHz
48 MHz
60 MHz
64 MHz
64 MHz, 128 MHz
76.8 MHz
78 MHz
80 MHz
96 MHz
97.5 MHz
100 MHz
110 MHz
120 MHz
128 MHz
144 MHz
150 MHz
150 MHz, 150 MHz
160 MHz

0 B
4 kB
4 kB, 128 kB
4 kB, 32 kB
8 kB
32 kB
64 kB
128 kB
256 kB
256 kB, 1 MB
352 kB
384 kB
0.5 MB
512 kB
640 kB
768 kB
1 MB
1024 kB
1152 kB
1.5 MB

2 kB
8 kB
16 kB
24 kB
32 kB
40 kB
48 kB
64 kB
64 kB, 512 kB
64 kB, 64 kB
80 kB
96 KB
96 kB
128 KB
128 kB
144 kB
162 kB
192 KB
192 kB
256 KB

8 I/O
14 I/O
15 I/O
16 I/O
17 I/O
18 I/O
19 I/O
20 I/O
22 I/O
23 I/O
24 I/O
25 I/O
26 I/O
27 I/O
28 I/O
29 I/O
30 I/O
31 I/O
32 I/O
33 I/O