.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: 1,582

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; }

Part #

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

STM32H573MIY3QTR
STMicroelectronics
1: $10.89
3,490On Order

Mfr. Part No.
STM32H573MIY3QTR

Mouser Part No
511-STM32H573MIY3QTR

STMicroelectronics

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

Learn More

Datasheet

3,490On Order

Cut Tape

$10.89

$8.47

$7.83

$7.09

View

Reel

$6.07

Min.: 1
Mult.: 1

: 5,000

ARM Microcontrollers - MCU

SMD/SMT

WLCSP-80

ARM Cortex M33

32 bit

250 MHz

2 MB

640 kB

12 bit

78 I/O

- 40 C

+ 125 C

Reel, Cut Tape

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

STM32H573RIT6
STMicroelectronics
1: $9.79
12,237On Order

Mfr. Part No.
STM32H573RIT6

Mouser Part No
511-STM32H573RIT6

STMicroelectronics

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

Learn More

Datasheet

12,237On Order

$9.79

$7.68

$7.07

$6.52

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M33

32 bit

250 MHz

2 MB

640 kB

12 bit

53 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

STM32H573RIV6
STMicroelectronics
1: $10.20
3,020Expected 20/09/2027

Mfr. Part No.
STM32H573RIV6

Mouser Part No
511-STM32H573RIV6

STMicroelectronics

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

Learn More

Datasheet

3,020Expected 20/09/2027

$10.20

$8.01

$7.37

$6.69

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

VFQFPN-68

ARM Cortex M33

32 bit

250 MHz

2 MB

640 kB

12 bit

53 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

STM32H573VIT3Q
STMicroelectronics
1: $10.81
23,220On Order

Mfr. Part No.
STM32H573VIT3Q

Mouser Part No
511-STM32H573VIT3Q

STMicroelectronics

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

Learn More

Datasheet

23,220On Order

$10.81

$8.42

$7.70

$7.16

$6.66

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M33

32 bit

250 MHz

2 MB

640 kB

12 bit

80 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

STM32H573VIT6
STMicroelectronics
1: $10.17
16,735On Order

Mfr. Part No.
STM32H573VIT6

Mouser Part No
511-STM32H573VIT6

STMicroelectronics

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

Learn More

Datasheet

16,735On Order

$10.17

$7.90

$7.21

$6.71

$6.23

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-100

ARM Cortex M33

32 bit

250 MHz

2 MB

640 kB

12 bit

80 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

STM32H573ZIT6
STMicroelectronics
1: $11.47
21,671On Order

Mfr. Part No.
STM32H573ZIT6

Mouser Part No
511-STM32H573ZIT6

STMicroelectronics

ARM Microcontrollers - MCU Arm Cortex-M33 32-bit 250 MHz 2 Mbytes Flash 640KB RAM hardware encryption accel

Learn More

Datasheet

21,671On Order

$11.47

$8.94

$8.02

$7.62

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-144

ARM Cortex M33

32 bit

250 MHz

2 MB

640 kB

12 bit

110 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 256 kbytes of Flash

STM32L552CCT6
STMicroelectronics
1: $10.28
6,000Expected 31/12/2026

Mfr. Part No.
STM32L552CCT6

Mouser Part No
511-STM32L552CCT6

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 256 kbytes of Flash

Learn More

Datasheet

6,000Expected 31/12/2026

$10.28

$8.07

$7.43

$6.85

View

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

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M33

32 bit

110 MHz

256 kB

2 x 12 bit

38 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 512 kbytes of Flash

STM32L562CET6
STMicroelectronics
1: $11.79
2,999Expected 31/12/2026

Mfr. Part No.
STM32L562CET6

Mouser Part No
511-STM32L562CET6

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 512 kbytes of Flash

Learn More

Datasheet

2,999Expected 31/12/2026

$11.79

$9.21

$8.18

$7.86

View

Min.: 1
Mult.: 1
Max.: 500

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M33

32 bit

110 MHz

512 kB

256 kB

2 x 12 bit

38 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 512 kbytes of Flash

STM32L562MEY6PTR
STMicroelectronics
1: $11.66
5,000Expected 22/03/2027

Mfr. Part No.
STM32L562MEY6PTR

Mouser Part No
511-STM32L562MEY6PTR

STMicroelectronics

ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 512 kbytes of Flash

Learn More

Datasheet

5,000Expected 22/03/2027

Cut Tape

$11.66

$9.10

$8.43

$7.76

$7.23

Reel

$7.23

MouseReel Available

Min.: 1
Mult.: 1
Max.: 1,000

: 5,000

ARM Microcontrollers - MCU

SMD/SMT

WLCSP-81

ARM Cortex M33

32 bit

110 MHz

512 kB

256 kB

2 x 12 bit

54 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

STM32U585OIY6QTR
STMicroelectronics
1: $11.10
9,975Expected 11/12/2026

Mfr. Part No.
STM32U585OIY6QTR

Mouser Part No
511-STM32U585OIY6QTR

STMicroelectronics

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

Learn More

Datasheet

9,975Expected 11/12/2026

Cut Tape

$11.10

$8.64

$7.99

$7.24

View

Reel

$6.19

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ARM Microcontrollers - MCU

SMD/SMT

WLCSP-90

ARM Cortex M33

2 MB

2 kB

16 bit

14 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

STM32U585QII6Q
STMicroelectronics
1: $12.84
4,942On Order

Mfr. Part No.
STM32U585QII6Q

Mouser Part No
511-STM32U585QII6Q

STMicroelectronics

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

Learn More

Datasheet

4,942On Order

$12.84

$10.27

$9.51

$8.62

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFBGA-132

ARM Cortex M33

2 MB

2 kB

16 bit

14 I/O

- 40 C

+ 85 C

Tray

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

STM32U585RIT6Q
STMicroelectronics
1: $11.26
10,298On Order

Mfr. Part No.
STM32U585RIT6Q

Mouser Part No
511-STM32U585RIT6Q

STMicroelectronics

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

Learn More

Datasheet

10,298On Order

$11.26

$8.79

$7.79

$7.48

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M33

2 MB

2 kB

16 bit

14 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU LPC55S69JBD64

LPC55S69JBD64K
NXP Semiconductors
1: $10.15
7,643On Order

Mfr. Part No.
LPC55S69JBD64K

Mouser Part No
771-LPC55S69JBD64K

NXP Semiconductors

ARM Microcontrollers - MCU LPC55S69JBD64

Learn More

Datasheet

7,643On Order

$10.15

$7.91

$7.00

$6.55

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

HTQFP-64

ARM Cortex M33

32 bit

150 MHz

640 kB

320 kB

16 bit

36 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU LPC55S69JEV98

LPC55S69JEV98Y
NXP Semiconductors
1: $10.46
4,000Expected 28/09/2026

Mfr. Part No.
LPC55S69JEV98Y

Mouser Part No
771-LPC55S69JEV98Y

NXP Semiconductors

ARM Microcontrollers - MCU LPC55S69JEV98

Learn More

Datasheet

4,000Expected 28/09/2026

Cut Tape

$10.46

$8.15

$7.23

$6.94

View

Reel

$6.00

Min.: 1
Mult.: 1

: 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

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

EFR32FG23A010F256GM48-C
Silicon Labs
1: $5.74
1,337Expected 25/09/2026

Mfr. Part No.
EFR32FG23A010F256GM48-C

Mouser Part No
634-FG2310F256GM48C

Silicon Labs

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

Learn More

Datasheet

1,337Expected 25/09/2026

$5.74

$4.38

$4.03

$3.66

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

ARM Microcontrollers - MCU Secure Vault High, 512k Flash, 128k RAM, 20-bit ADC, MCU, QFN68

EFM32PG26B101F512IM68-B
Silicon Labs
1: $5.26
1,275Expected 06/11/2026

Mfr. Part No.
EFM32PG26B101F512IM68-B

Mouser Part No
634-MPG26B101512IM68

Silicon Labs

ARM Microcontrollers - MCU Secure Vault High, 512k Flash, 128k RAM, 20-bit ADC, MCU, QFN68

Learn More

Datasheet

1,275Expected 06/11/2026

$5.26

$4.01

$3.70

$3.52

$3.51

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

QFN-68

ARM Cortex M33

32 bit

80 MHz

512 kB

128 kB

12 bit, 16 bit, 20 bit

48 I/O

- 40 C

+ 125 C

Tray

ARM Microcontrollers - MCU High-performance Arm Cortex-M33 MCU 512-Kbyte Flash 272-Kbyte RAM 250 MHz CPU

STM32H533VEI6
STMicroelectronics
1: $7.64
5In Stock

Mfr. Part No.
STM32H533VEI6

Mouser Part No
511-STM32H533VEI6

STMicroelectronics

ARM Microcontrollers - MCU High-performance Arm Cortex-M33 MCU 512-Kbyte Flash 272-Kbyte RAM 250 MHz CPU

Learn More

Datasheet

5In Stock

$7.64

$5.45

$5.16

$4.94

$4.31

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFBGA-100

ARM Cortex M33

32 bit

250 MHz

512 kB

272 kB

12 bit

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance Arm Cortex-M33 MCU 512-Kbyte Flash 272-Kbyte RAM 250 MHz CPU

STM32H523HEY6TR
STMicroelectronics
1: $5.56
9,990Expected 12/03/2027

Mfr. Part No.
STM32H523HEY6TR

Mouser Part No
511-STM32H523HEY6TR

STMicroelectronics

ARM Microcontrollers - MCU High-performance Arm Cortex-M33 MCU 512-Kbyte Flash 272-Kbyte RAM 250 MHz CPU

Learn More

Datasheet

9,990Expected 12/03/2027

Cut Tape

$5.56

$3.98

$3.61

$3.28

View

Reel

$2.66

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ARM Microcontrollers - MCU

SMD/SMT

WLCSP-39

ARM Cortex M33

32 bit

250 MHz

512 kB

272 kB

12 bit

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

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

STM32U595QII6Q
STMicroelectronics
1: $17.91
2,490Expected 19/04/2027

Mfr. Part No.
STM32U595QII6Q

Mouser Part No
511-STM32U595QII6Q

STMicroelectronics

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

Learn More

Datasheet

2,490Expected 19/04/2027

$17.91

$14.10

$12.86

$12.09

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

106 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 256 KB flash, 64 KB RAM, I3C, Dual FDCAN

STM32C542CCT6
STMicroelectronics
1: $2.55
1,493Expected 12/11/2026
New Product

Mfr. Part No.
STM32C542CCT6

Mouser Part No
511-STM32C542CCT6

New Product

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 256 KB flash, 64 KB RAM, I3C, Dual FDCAN

Learn More

Datasheet

1,493Expected 12/11/2026

$2.55

$1.89

$1.63

$1.55

Min.: 1
Mult.: 1
Max.: 100

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M33

32 bit

144 MHz

256 kB

64 kB

12 bit

38 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 256 KB flash, 64 KB RAM, I3C, Dual FDCAN

STM32C542FCP6
STMicroelectronics
1: $3.22
1,470Expected 03/03/2027
New Product

Mfr. Part No.
STM32C542FCP6

Mouser Part No
511-STM32C542FCP6

New Product

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 256 KB flash, 64 KB RAM, I3C, Dual FDCAN

Learn More

Datasheet

1,470Expected 03/03/2027

$3.22

$2.10

$1.93

$1.66

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

TSSOP-20

ARM Cortex M33

32 bit

144 MHz

256 kB

64 kB

12 bit

14 I/O

- 40 C

+ 85 C

Tube

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 512 KB flash, 128 KB RAM, I3C

STM32C551KET6
STMicroelectronics
1: $3.00
2,947On Order
New Product

Mfr. Part No.
STM32C551KET6

Mouser Part No
511-STM32C551KET6

New Product

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 512 KB flash, 128 KB RAM, I3C

Learn More

Datasheet

2,947On Order

$3.00

$2.07

$1.86

$1.68

Min.: 1
Mult.: 1
Max.: 100

ARM Microcontrollers - MCU

SMD/SMT

LQFP-32

ARM Cortex M33

32 bit

144 MHz

512 kB

128 kB

12 bit

25 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 512 KB flash, 128 KB RAM, I3C, FDCAN, crypto

STM32C562KEU6
STMicroelectronics
1: $3.03
2,880Expected 06/11/2026
New Product

Mfr. Part No.
STM32C562KEU6

Mouser Part No
511-STM32C562KEU6

New Product

STMicroelectronics

ARM Microcontrollers - MCU Mainstream Arm Cortex-M33 MCU, 144 MHz, 512 KB flash, 128 KB RAM, I3C, FDCAN, crypto

Learn More

Datasheet

2,880Expected 06/11/2026

$3.03

$2.26

$1.95

$1.81

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

UFQFPN-32

ARM Cortex M33

32 bit

144 MHz

512 kB

128 kB

12 bit

25 I/O

- 40 C

+ 85 C

Tray

ARM Microcontrollers - MCU High-performance, Arm Cortex-M33, MCU 128-Kbyte Flash, 32-Kbyte RAM, 250 MHz CPU

STM32H503RBT7
STMicroelectronics
1: $4.87
960Expected 22/02/2027

Mfr. Part No.
STM32H503RBT7

Mouser Part No
511-STM32H503RBT7

STMicroelectronics

ARM Microcontrollers - MCU High-performance, Arm Cortex-M33, MCU 128-Kbyte Flash, 32-Kbyte RAM, 250 MHz CPU

Learn More

Datasheet

960Expected 22/02/2027

$4.87

$3.48

$3.15

$2.87

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-64

ARM Cortex M33

32 bit

250 MHz

128 kB

32 kB

12 bit

49 I/O

- 40 C

+ 105 C

Tray

ARM Microcontrollers - MCU High-performance Arm Cortex-M33 MCU 256-Kbyte Flash 272-Kbyte RAM 250 MHz CPU

STM32H523CCT6
STMicroelectronics
1: $5.03
1,499Expected 01/02/2027

Mfr. Part No.
STM32H523CCT6

Mouser Part No
511-STM32H523CCT6

STMicroelectronics

ARM Microcontrollers - MCU High-performance Arm Cortex-M33 MCU 256-Kbyte Flash 272-Kbyte RAM 250 MHz CPU

Learn More

Datasheet

1,499Expected 01/02/2027

$5.03

$3.60

$3.26

$2.96

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-48

ARM Cortex M33

32 bit

250 MHz

256 kB

272 kB

12 bit

- 40 C

+ 85 C

Tray

ARM Cortex M33 Core Embedded Processors & Controllers

Types of Embedded Processors & Controllers

Customer Service Office

Company

Resources

Support

BGA-136
BGA-144
BGA-36
BGA-64
BGA-74
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
LQFP-100

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