AX88190AL datasheet(9/49 Pages) ASIX

9 / 49 page

AX88190A

PCMCIA Fast Ethernet MAC Controller

ASIX ELECTRONICS CORPORATION

2.4 SNI Interface pins group

SIGNAL

TYPE

PIN NO.

DESCRIPTION

STXC

Transmit Clock : this signal is driven by PHY with 20MHz clock.

STXD

Transmit Data : STXD is transition synchronously with respect to the

rising edge of STXC. For each STXC period in which STXE is

asserted, STXD is accepted for transmission by the PHY.

STXE

Transmit Enable : STXE is transition synchronously with respect to

the rising edge of STXC. STXE indicates that the port is presenting

data on STXD for transmission.

SCOL

Collision : this signal is driven by PHY when collision is detected.

SRXC

Receive Clock : SRXC is driven by PHY for received data

synchronization.

SRXD

Receive Data : SRXD is driven by the PHY synchronously with respect

to SRXC.

SCRS

Carrier Sense : Asynchronous signal SCRS is asserted by the PHY

when either the transmit or receive medium is non-idle.

SLINK#

I/PU

Link indicator : Active low indicate the SNI interface is link to

network. When SNI is not used must keep the pin no connection or

pull high the signal.

Tab - 4 Serial Network Interface pins group

2.5 Modem interface pins group

Signal Name

Type

Pin No.

Description

MRDY

I/PU

118

Modem Ready : MRDY low indicates that modem is initializing the

modem after reset signal asserted or the modem is at SLEEP/STOP

mode.

MRESET#

117

Modem Reset :This signal asserts low to reset the modem chipset.

MDCS#

111

Modem Chip Select : This signal connected to modem chip select pin.

MPWDN

116

Modem Power Down : Rockwell modem chipset, this signal asserts

low to let modem chipset into power down mode. AT&T modem

chipset, this signal asserts high to let modem chipset into power down

mode.

MINT

I/PD

112

Modem Interrupt : This signal driven by modem chipset to active

interrupt.

MRIN#

I/PU

115

Ring Input :This signal is driven by DAA’s ring detect circuit. When

a telephone ringing signal is being received.

MAUDIO

I/PD

113

Modem Audio : This signal is passed to PCMCIA interface via SPKR.

Tab - 5 Modem interface signals group

2.6 General Purpose I/O pins group

Signal Name

Type

Pin No.

Description

GPI[3]

Read register offset 18h bit 3 value reflects this input value.

GPI[2]

Read register offset 18h bit 2 value reflects this input value.

GPI[1]

Read register offset 18h bit 1 value reflects this input value.

GPI[0]

Read register offset 18h bit 0 value reflects this input value.

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