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MX98728EC

GMAC SINGLE CHIP 10/100 FAST ETHERNET CONTROLLER FOR GENERIC APPLICATION

Macronix International 

MX98728EC

23

21

11-8,

6-3,

1,

160, 159,

157-155,

152,151

148

147

150,149

MA1(EEDI)

MA0(EECK)

MD[15:0]

MOEB

MCSB

MWEB[1:0]

I/O,4ma

I/O,4ma

I/O,4ma

Memory Address Bit 1 or EEPROM Data In bit: During the

EEPROM auto load sequence, the MA1 pin acts as the EEDI

pin that writes the data stream into the EEPROM. After the

EEPROM auto load sequence is done, this pin becomes MA1.

Together with MA[19:2], they form the packet buffer address

lines.

Memory Address Bit 0 or EEPROM Clock Input : During the

EEPROM auto load sequence, MA0 pin acts as the EECK pin

that provides clock to the EEPROM. After the EEPROM autoload

sequence is done, this pin becomes MA0. Together with MA[19:1],

they form the packet buffer address lines. MA0 is don't care

when packet memory is in word mode.

Packet Memory Data Bits 15-0: (Internal pull-down)

O,4ma

O,4ma

O,4ma

Memory Output Enable: Active low during packet buffer read

accesses.

Memory Chip Select: Active low during packet buffer accesses.

Byte Write Enable: Active low during the packet buffer write cycle.

MWEB1 for the high byte and MWEB0 for the low byte.

10/100 Transceiver interface

PAD#

53

56

55

64

Pin Name

RDA

CKREF(X1)

X2

RXIN

Type

O

I,TTL

O

I

65

RXIP

I

71

TXON

O

72

TXOP

O

75

CPK

O

76

RTX2EQ

O

77

RTX

O

P/N:PM0723

Description

RDA external resistor to ground: 10K ohm, 5%

25Mhz , 30 PPM external osc./crystal input :

25Mhz , 30 PPM external crystal output :

Twisted pair receive differential input: supports both 10/100 Mbps

speeds.

Twisted pair receive differential input: supports both 10/100 Mbps

speeds.

Twisted pair transmit differential output: supports both 10/100 Mbps

speeds, 802.3 AOI spec.

Twisted pair transmit differential output: supports both 10/100 Mbps

speeds, 802.3 AOI spec.

NC pin : used in the test mode only.

RTX2EQ external resistor to ground: 1.4K ohm, 5%

RTX external resistor to ground: 560 ohm, 5%

REV. 1.0, JUL. 13, 2000

7

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