BUS CONTROLLER, PCI Bus Controllers 920

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Part RoHS Manufacturer Peripheral IC Type Temperature Grade Terminal Form No. of Terminals Package Code Package Shape Package Body Material Surface Mount Maximum Supply Voltage Screening Level Address Bus Width No. of Bits DAC Channels Bit Size Power Supplies (V) Package Style (Meter) Package Equivalence Code Minimum Supply Voltage Maximum Operating Temperature CPU Family Maximum Data Transfer Rate Minimum Operating Temperature Terminal Finish ADC Channels Terminal Position DMA Channels Maximum Seated Height ROM Words Width Data EEPROM Size Additional Features Peripherals External Data Bus Width Maximum Clock Frequency Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Length RAM Bytes Technology Maximum Supply Current Nominal Supply Voltage PWM Channels Sub-Category Connectivity ROM Programmability Bus Compatibility Terminal Pitch JESD-30 Code Moisture Sensitivity Level (MSL) Qualification Speed Drive Interface Standard JESD-609 Code On Chip Program ROM Width No. of I/O Lines

89H24NT6AG2ZBHLGI8

Renesas Electronics

BUS CONTROLLER, PCI

TIN SILVER COPPER

250

CMOS

4

e1

89H24NT24G2ZCHLGI

Renesas Electronics

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5,3.3

GRID ARRAY

BGA324,18X18,40

.9 V

85 Cel

24000 MBps

-40 Cel

Tin/Silver/Copper (Sn/Ag/Cu)

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

NOT SPECIFIED

260

19 mm

CMOS

3400 mA

1 V

Bus Controllers

I2C; ISA; VGA

1 mm

S-PBGA-B324

4

Not Qualified

e1

89H22H16G2ZBBLG

Renesas Electronics

BUS CONTROLLER, PCI

COMMERCIAL

BALL

1156

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5,2.5/3.3

GRID ARRAY

BGA1156,34X34,40

.9 V

70 Cel

22000 MBps

0 Cel

BOTTOM

3.42 mm

35 mm

0

125 MHz

NOT SPECIFIED

NOT SPECIFIED

35 mm

CMOS

5455 mA

1 V

Bus Controllers

I2C; ISA; PCI; SMBUS; VGA

1 mm

S-PBGA-B1156

Not Qualified

89HT0832PGZCHLGI

Renesas Electronics

BUS CONTROLLER, PCI

TIN SILVER COPPER

245

3

e1

89HT0816APZCBLGI

Renesas Electronics

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

196

BGA

SQUARE

PLASTIC/EPOXY

YES

1.05 V

GRID ARRAY

BGA196,14X14,40

.95 V

85 Cel

1000 MBps

-40 Cel

TIN SILVER COPPER

BOTTOM

2.85 mm

15 mm

100 MHz

245

15 mm

CMOS

1734 mA

1 V

I2C; PCI; SMBUS

1 mm

S-PBGA-B196

4

e1

89HT0832PZCBLG8

Renesas Electronics

BUS CONTROLLER, PCI

TIN SILVER COPPER

245

4

e1

CA91L8260B-100IE

Renesas Electronics

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

420

HBGA

SQUARE

PLASTIC/EPOXY

YES

2.63 V

32

GRID ARRAY, HEAT SINK/SLUG

BGA420,26X26,50

2.38 V

85 Cel

-40 Cel

BOTTOM

2.46 mm

35 mm

64

100 MHz

35 mm

CMOS

2.5 V

I2C; VGA; MPC826X; MPC825X; MPC827X; MPC8280; MPC74X; MPC75X; POWERPC 7400; POWERPC 7XX

1.27 mm

S-PBGA-B420

IEEE 1394

89H24NT6AG2ZBHLG8

Renesas Electronics

BUS CONTROLLER, PCI

TIN SILVER COPPER

250

CMOS

4

e1

89H22H16G2ZABL

Renesas Electronics

BUS CONTROLLER, PCI

COMMERCIAL

BALL

484

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5

GRID ARRAY

BGA484,22X22,40

.9 V

70 Cel

22000 MBps

0 Cel

BOTTOM

3.32 mm

23 mm

0

125 MHz

23 mm

CMOS

1698 mA

1 V

Bus Controllers

I2C; ISA; PCI; SMBUS; VGA

1 mm

S-PBGA-B484

Not Qualified

89HT0816APZCBLG8

Renesas Electronics

BUS CONTROLLER, PCI

COMMERCIAL

BALL

196

BGA

SQUARE

PLASTIC/EPOXY

YES

1.05 V

GRID ARRAY

BGA196,14X14,40

.95 V

70 Cel

1000 MBps

0 Cel

TIN SILVER COPPER

BOTTOM

2.85 mm

15 mm

100 MHz

245

15 mm

CMOS

1734 mA

1 V

I2C; PCI; SMBUS

1 mm

S-PBGA-B196

4

e1

CA91L862A-50IE

Renesas Electronics

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

256

BGA

SQUARE

PLASTIC/EPOXY

YES

3.46 V

32

GRID ARRAY

3.14 V

85 Cel

-40 Cel

TIN LEAD

BOTTOM

3.5 mm

27 mm

32

50 MHz

20

225

27 mm

CMOS

3.3 V

MC68360; MPC860

1.27 mm

S-PBGA-B256

3

Not Qualified

IEEE 1149.1

e0

89H24NT24G2ZBHLI

Renesas Electronics

BUS CONTROLLER, PCI

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

GRID ARRAY

BGA324,18X18,40

.9 V

85 Cel

24000 MBps

-40 Cel

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

19 mm

CMOS

3400 mA

1 V

I2C; ISA; VGA

1 mm

S-PBGA-B324

89H24NT24G2ZBHLG

Renesas Electronics

BUS CONTROLLER, PCI

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

GRID ARRAY

BGA324,18X18,40

.9 V

70 Cel

24000 MBps

0 Cel

Tin/Silver/Copper (Sn/Ag/Cu)

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

NOT SPECIFIED

260

19 mm

CMOS

3400 mA

1 V

I2C; ISA; VGA

1 mm

S-PBGA-B324

4

e1

89H24NT24G2ZCHLI

Renesas Electronics

BUS CONTROLLER, PCI

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

GRID ARRAY

BGA324,18X18,40

.9 V

85 Cel

24000 MBps

-40 Cel

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

19 mm

CMOS

3400 mA

1 V

I2C; ISA; VGA

1 mm

S-PBGA-B324

89H24NT24G2ZBHL

Renesas Electronics

BUS CONTROLLER, PCI

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

GRID ARRAY

BGA324,18X18,40

.9 V

70 Cel

24000 MBps

0 Cel

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

19 mm

CMOS

3400 mA

1 V

I2C; ISA; VGA

1 mm

S-PBGA-B324

89H24NT24G2ZBHLGI

Renesas Electronics

BUS CONTROLLER, PCI

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

GRID ARRAY

BGA324,18X18,40

.9 V

85 Cel

24000 MBps

-40 Cel

Tin/Silver/Copper (Sn/Ag/Cu)

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

NOT SPECIFIED

260

19 mm

CMOS

3400 mA

1 V

I2C; ISA; VGA

1 mm

S-PBGA-B324

4

e1

89H24NT24G2ZCHL

Renesas Electronics

BUS CONTROLLER, PCI

BALL

324

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

GRID ARRAY

BGA324,18X18,40

.9 V

70 Cel

24000 MBps

0 Cel

BOTTOM

2.88 mm

19 mm

ALSO OPERATES AT 100 MHZ

0

125 MHz

19 mm

CMOS

3400 mA

1 V

I2C; ISA; VGA

1 mm

S-PBGA-B324

89H24NT6AG2ZCHL

Renesas Electronics

BUS CONTROLLER, PCI

BALL

484

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

GRID ARRAY

BGA484,22X22,40

.9 V

70 Cel

24000 MBps

0 Cel

BOTTOM

2.92 mm

23 mm

ALSO OPERATES AT 100 MHZ

125 MHz

23 mm

CMOS

3400 mA

1 V

I2C; ISA; SMBUS; VGA

1 mm

S-PBGA-B484

89H24NT6AG2ZCHLI

Renesas Electronics

BUS CONTROLLER, PCI

BALL

484

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

GRID ARRAY

BGA484,22X22,40

.9 V

85 Cel

24000 MBps

-40 Cel

BOTTOM

2.92 mm

23 mm

ALSO OPERATES AT 100 MHZ

125 MHz

23 mm

CMOS

3400 mA

1 V

I2C; ISA; SMBUS; VGA

1 mm

S-PBGA-B484

89H24NT6AG2ZBHL

Renesas Electronics

BUS CONTROLLER, PCI

BALL

484

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

GRID ARRAY

BGA484,22X22,40

.9 V

70 Cel

24000 MBps

0 Cel

BOTTOM

2.92 mm

23 mm

ALSO OPERATES AT 100 MHZ

125 MHz

23 mm

CMOS

3400 mA

1 V

I2C; ISA; SMBUS; VGA

1 mm

S-PBGA-B484

89H24NT6AG2ZBHLI

Renesas Electronics

BUS CONTROLLER, PCI

BALL

484

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

GRID ARRAY

BGA484,22X22,40

.9 V

85 Cel

24000 MBps

-40 Cel

BOTTOM

2.92 mm

23 mm

ALSO OPERATES AT 100 MHZ

125 MHz

23 mm

CMOS

3400 mA

1 V

I2C; ISA; SMBUS; VGA

1 mm

S-PBGA-B484

89H22H16G2ZCBLG

Renesas Electronics

BUS CONTROLLER, PCI

COMMERCIAL

BALL

1156

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5,2.5/3.3

GRID ARRAY

BGA1156,34X34,40

.9 V

70 Cel

22000 MBps

0 Cel

TIN SILVER COPPER

BOTTOM

3.42 mm

35 mm

0

125 MHz

245

35 mm

CMOS

5455 mA

1 V

Bus Controllers

I2C; ISA; PCI; SMBUS; VGA

1 mm

S-PBGA-B1156

4

Not Qualified

e1

89H22H16G2ZCBLGI

Renesas Electronics

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

1156

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5,2.5/3.3

GRID ARRAY

BGA1156,34X34,40

.9 V

85 Cel

22000 MBps

-40 Cel

BOTTOM

3.42 mm

35 mm

0

125 MHz

NOT SPECIFIED

NOT SPECIFIED

35 mm

CMOS

5455 mA

1 V

Bus Controllers

I2C; ISA; PCI; SMBUS; VGA

1 mm

S-PBGA-B1156

Not Qualified

89H22H16G2ZCBL

Renesas Electronics

BUS CONTROLLER, PCI

COMMERCIAL

BALL

1156

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5,2.5/3.3

GRID ARRAY

BGA1156,34X34,40

.9 V

70 Cel

22000 MBps

0 Cel

TIN LEAD

BOTTOM

3.42 mm

35 mm

0

125 MHz

225

35 mm

CMOS

5455 mA

1 V

Bus Controllers

I2C; ISA; PCI; SMBUS; VGA

1 mm

S-PBGA-B1156

4

Not Qualified

e0

89H22H16G2ZCBLI

Renesas Electronics

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

1156

BGA

SQUARE

PLASTIC/EPOXY

YES

1.1 V

0

1,2.5,2.5/3.3

GRID ARRAY

BGA1156,34X34,40

.9 V

85 Cel

22000 MBps

-40 Cel

TIN LEAD

BOTTOM

3.42 mm

35 mm

0

125 MHz

225

35 mm

CMOS

5455 mA

1 V

Bus Controllers

I2C; ISA; PCI; SMBUS; VGA

1 mm

S-PBGA-B1156

4

Not Qualified

e0

OR3LP26BA352

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

352

BGA

SQUARE

PLASTIC/EPOXY

YES

2.63 V

64

GRID ARRAY

2.38 V

70 Cel

528 MBps

0 Cel

TIN LEAD

BOTTOM

2.54 mm

35 mm

ALSO OPERATES AT 3.3V SUPPLY

64

66 MHz

30

225

35 mm

CMOS

2.5 V

1.27 mm

S-PBGA-B352

Not Qualified

e0

PCI6140-AA33PC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

GULL WING

128

FQFP

RECTANGULAR

PLASTIC/EPOXY

YES

3.6 V

32

3.3

FLATPACK, FINE PITCH

QFP128,.67X.93,20

3 V

70 Cel

0 Cel

TIN LEAD

QUAD

14 mm

32

33 MHz

20 mm

CMOS

3.3 V

Bus Controllers

.5 mm

R-PQFP-G128

Not Qualified

e0

PCI6150-BB66BC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

256

BGA

SQUARE

PLASTIC/EPOXY

YES

3.6 V

32

GRID ARRAY

3 V

70 Cel

0 Cel

BOTTOM

1.76 mm

17 mm

32

66 MHz

260

17 mm

CMOS

3.3 V

1 mm

S-PBGA-B256

3

Not Qualified

PCI6152-CC33BC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

160

LBGA

SQUARE

PLASTIC/EPOXY

YES

3.6 V

32

GRID ARRAY, LOW PROFILE

3 V

70 Cel

0 Cel

BOTTOM

1.4 mm

15 mm

32

33 MHz

NOT SPECIFIED

NOT SPECIFIED

15 mm

CMOS

3.3 V

1 mm

S-PBGA-B160

Not Qualified

L-ET1201-L-DT

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

GULL WING

128

LFQFP

SQUARE

PLASTIC/EPOXY

YES

2.625 V

32

FLATPACK, LOW PROFILE, FINE PITCH

2.375 V

70 Cel

100 MBps

0 Cel

TIN BISMUTH

QUAD

1.6 mm

14 mm

32

25 MHz

40

250

14 mm

CMOS

2.5 V

.4 mm

S-PQFP-G128

Not Qualified

e6

NET2280REV1A-LF

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

GULL WING

120

TFQFP

SQUARE

PLASTIC/EPOXY

YES

2.7 V

32

FLATPACK, THIN PROFILE, FINE PITCH

2.3 V

70 Cel

0 Cel

QUAD

1.2 mm

14 mm

32

260

14 mm

CMOS

2.5 V

8051; USB

.4 mm

S-PQFP-G120

4

PCI6540-BB13BC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

380

BGA

SQUARE

PLASTIC/EPOXY

YES

2.75 V

64

2.5,3.3

GRID ARRAY

BGA380,20X20,50

2.25 V

70 Cel

0 Cel

TIN LEAD

BOTTOM

2.5 mm

27 mm

ALSO REQUIRES 3.3V SUPPLY

64

133 MHz

27 mm

CMOS

2.5 V

Bus Controllers

1.27 mm

S-PBGA-B380

Not Qualified

e0

PCI6254-AB66BC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

365

BGA

SQUARE

PLASTIC/EPOXY

YES

3.6 V

64

3.3

GRID ARRAY

BGA365,23X23,50

3 V

70 Cel

0 Cel

TIN LEAD

BOTTOM

2.53 mm

31 mm

64

66 MHz

31 mm

CMOS

3.3 V

Bus Controllers

1.27 mm

S-PBGA-B365

Not Qualified

e0

OXPCIE952-FBAG

Broadcom

BUS CONTROLLER, PCI

INDUSTRIAL

BALL

120

TFBGA

SQUARE

PLASTIC/EPOXY

YES

1.32 V

0

GRID ARRAY, THIN PROFILE, FINE PITCH

1.08 V

85 Cel

-40 Cel

BOTTOM

1.2 mm

11 mm

8

260

11 mm

CMOS

1.2 V

PCI

.8 mm

S-PBGA-B120

3

IEEE 1284

BCM5714S

Broadcom

BUS CONTROLLER, PCI

BALL

484

BGA

UNSPECIFIED

PLASTIC/EPOXY

YES

GRID ARRAY

BOTTOM

CMOS

1.2 V

X-PBGA-B484

Not Qualified

LSISAS1064

Broadcom

BUS CONTROLLER, PCI

BALL

472

BGA

SQUARE

PLASTIC/EPOXY

YES

1.26 V

64

GRID ARRAY

1.14 V

TIN LEAD

BOTTOM

2.5 mm

27 mm

ALSO REQUIRES 3.3V SUPPLY

64

133 MHz

30

225

27 mm

CMOS

1.2 V

1 mm

S-PBGA-B472

Not Qualified

e0

PCI6152-CC66BC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

160

BGA

SQUARE

PLASTIC/EPOXY

YES

3.6 V

32

GRID ARRAY

3 V

70 Cel

0 Cel

TIN LEAD

BOTTOM

1.4 mm

15 mm

ALSO REQUIRES TYP 5 V

32

66 MHz

NOT SPECIFIED

NOT SPECIFIED

15 mm

CMOS

3.3 V

1 mm

S-PBGA-B

Not Qualified

e0

PCI6520-BB13BC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

380

BGA

SQUARE

PLASTIC/EPOXY

YES

2.75 V

64

2.5,3.3

GRID ARRAY

BGA380,20X20,50

2.25 V

70 Cel

0 Cel

TIN LEAD

BOTTOM

2.5 mm

27 mm

ALSO REQUIRES 3.3V SUPPLY

64

133 MHz

27 mm

CMOS

2.5 V

Bus Controllers

1.27 mm

S-PBGA-B380

Not Qualified

e0

SAS3008

Broadcom

BUS CONTROLLER, PCI

UNSPECIFIED

UNSPECIFIED

UNSPECIFIED

1000 MBps

UNSPECIFIED

CMOS

ATA; I2C; UART

SAS2308

Broadcom

BUS CONTROLLER, PCI

BALL

837

BGA

UNSPECIFIED

PLASTIC/EPOXY

YES

GRID ARRAY

1000 MBps

BOTTOM

CMOS

ATA; I2C; UART

X-PBGA-B837

BCM5714C

Broadcom

BUS CONTROLLER, PCI

BALL

484

BGA

SQUARE

PLASTIC/EPOXY

YES

GRID ARRAY

BOTTOM

CMOS

1.2 V

PCI

S-PBGA-B484

Not Qualified

L-ET1301FER1B2-M-DT

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

NO LEAD

68

HQCCN

SQUARE

PLASTIC/EPOXY

YES

2.62 V

0

CHIP CARRIER, HEAT SINK/SLUG

2.38 V

70 Cel

100 MBps

0 Cel

MATTE TIN OVER NICKEL

QUAD

10 mm

0

25 MHz

40

260

10 mm

CMOS

2.5 V

.5 mm

S-PQCC-N68

Not Qualified

e3

PCI6152-CC66BCF

Broadcom

BUS CONTROLLER, PCI

BALL

BGA

SQUARE

PLASTIC/EPOXY

YES

GRID ARRAY

BOTTOM

ALSO REQUIRES TYP 5 V

66 MHz

NOT SPECIFIED

NOT SPECIFIED

CMOS

3.3 V

S-PBGA-B

PCI6152-CC33PC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

GULL WING

160

QFP

SQUARE

PLASTIC/EPOXY

YES

3.6 V

32

FLATPACK

3 V

70 Cel

0 Cel

QUAD

4.45 mm

28 mm

ALSO REQUIRES TYP 5 V

32

33 MHz

28 mm

CMOS

3.3 V

.65 mm

S-PQFP-G

1

Not Qualified

OR3LP26BM680

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

BALL

680

BGA

SQUARE

PLASTIC/EPOXY

YES

2.63 V

64

GRID ARRAY

2.38 V

70 Cel

528 MBps

0 Cel

TIN LEAD

BOTTOM

2.51 mm

35 mm

ALSO OPERATES AT 3.3V SUPPLY

64

66 MHz

30

225

35 mm

CMOS

2.5 V

1 mm

S-PBGA-B680

Not Qualified

e0

PCI6150-BB66PC

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

GULL WING

208

FQFP

SQUARE

PLASTIC/EPOXY

YES

3.6 V

32

3.3

FLATPACK, FINE PITCH

QFP208,1.2SQ,20

3 V

70 Cel

0 Cel

TIN LEAD

QUAD

28 mm

32

66 MHz

28 mm

CMOS

3.3 V

Bus Controllers

.5 mm

S-PQFP-G208

3

Not Qualified

e0

L-ET1301FER1B2-M-D

Broadcom

BUS CONTROLLER, PCI

COMMERCIAL

NO LEAD

68

HQCCN

SQUARE

PLASTIC/EPOXY

YES

2.62 V

0

CHIP CARRIER, HEAT SINK/SLUG

2.38 V

70 Cel

100 MBps

0 Cel

MATTE TIN

QUAD

10 mm

0

25 MHz

40

260

10 mm

CMOS

2.5 V

.5 mm

S-PQCC-N68

Not Qualified

e3

PCI6152-CC33BCF

Broadcom

BUS CONTROLLER, PCI

BALL

SQUARE

PLASTIC/EPOXY

YES

BOTTOM

CMOS

5 V

PCI

R-PBGA-B

Bus Controllers

Bus controllers are integrated circuits that are used to manage and control the flow of data and control signals between different devices in a computer system. They are commonly used in systems that have multiple buses, such as a memory bus and an I/O bus. Bus controllers ensure that data is transferred efficiently and correctly between different devices in the system.

One of the primary functions of a bus controller is to manage bus arbitration. Bus arbitration is the process of resolving conflicts that occur when two or more devices on the bus attempt to access the bus at the same time. Bus controllers use various algorithms to determine which device has priority access to the bus and when other devices can access it.

Another important function of bus controllers is to manage the transfer of data and control signals between devices on the bus. This involves controlling the timing and synchronization of signals, as well as error detection and correction. Bus controllers also manage other aspects of the bus, such as interrupt handling and power management.