beautypg.com

Rainbow Electronics AT75C220 User Manual

Page 5

background image

AT75C220

5

MAC B Interface

MB_COL

MAC B Collision Detect

Input

MB_CRS

MAC B Carrier Sense

Input

MB_TXER

MAC B Transmit Error

Output

MB_TXD[3:0]

MAC B Transmit Data Bus

Output

MB_TXEN

MAC B Transmit Enable

Output

MB_TXCLK

MAC B Transmit Clock

Input

MB_RXD[3:0]

MAC B Receive Data Bus

Input

MB_RXER

MAC B Receive Error

Input

MB_RXCLK

MAC B Receive Clock

Input

MB_RXDV

MAC B Receive Data Valid

Output

MB_MDC

MAC B Management Data Clock

Output

MB_MDIO

MAC B Management Data Bus

Input/Output

MB_LINK

MAC B Link Interrupt

Input

Miscellaneous

RESET

Power on Reset

Input

FIQ/LOWP

Fast Interrupt/Low Power

Input

IRQ0

External Interrupt Requests

Input

XREF240

External 240 MHz PLL Reference

Input

XTALIN

External Crystal Input

Input

XTALOUT

External Crystal Ouptut

Output

TST

Test Mode

Input

B0256

Package Size Option (1 = 256 pins)

Input

DBW32

External Data Bus Width for CS0 (1 = 32 bits)

Input

Table 1. AT75C220 Pin Description List (Continued)

Block

Pin Name

Function

Type