Interfacing devices

---

-- indicates buffer register is empty

• TXE

• TXRDY

• TXC

• TXD

TXC stands for ------

• Transmit clock

• transmit data

• buffer transmit

• BUFFER EMPLTY

IDENTIFY THE CHIP NUMBER FOR TIMER

• 8251

• 8253

• 8255

• 8259

IDENTIFY THE CHIP NUMBER FOR ports

• 8251

• 8253

• 8255

• 8259

IDENTIFY THE CHIP NUMBER FOR SERIAL COMMUNICATION

• 8251

• 8253

• 8255

• 8259

IDENTIFY THE CHIP NUMBER FOR INTERRUPT CONTROLLER

• 8251

• 8253

• 8255

• 8259

IDENTIFY THE CHIP NUMBER FOR ADC

• 0808

• 0806

• 0804

• 0809

IDENTIFY THE CHIP NUMBER FOR DAC

• 0808

• 0804

• 0806

• 0809

How many counter registers in 8253

• 1

• 2

• 3

• 4

What is the size of counter registers in 8253?

• 4 bit

• 8 bits

• 16 bits

• 32 bits