AX88190AL datasheet(7/49 Pages) ASIX

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AX88190A

PCMCIA Fast Ethernet MAC Controller

ASIX ELECTRONICS CORPORATION

2.0 Signal Description

The following terms describe the AX88190A pin-out:

All pin names with the “#” suffix are asserted low.

The following abbreviations are used in following Tables.

Input

Pull Up

Output

Pull Down

I/O

Input/Output

Power Pin

Open Drain

2.1 PCMCIA Bus Interface Signals Group

SIGNAL

TYPE

PIN NO.

DESCRIPTION

SA[9:0]

10 – 1

System Address : Signals SA[9:0] are address bus input lines which

enable direct address of up to 64K memory and I/O spaces on card.

SD[15:0]

I/O

20 – 23,

25 – 38,

30 – 33,

35 – 38

System Data Bus : Signals SD[15:0] constitute the bi-directional data

bus.

IREQ#

Interrupt Request : IREQ# is asserted to indicate the host system that

the PC Card device requires host software service.

WAIT#

125

Wait : This signal is set low to insert wait states during Remote DMA

transfer.

REG#

123

Attribute Memory and I/O Space Select : When the REG# signal is

asserted, access is limited to Attribute Memory and to the I/O space.

IORD#

I/O Read : The host asserts IORD# to read data from AX88190A I/O

space.

IOWR#

I/O Write : The host asserts IOWR# to write data into AX88190A I/O

space.

OE#

Output Enable : The OE# line is used to gate Memory Read data from

memory on PC Card

WE#

Write Enable : The WE# signal is used for strobing Memory Write

data into the memory on PC Card.

IOIS16#

120

I/O is 16 Bit Port : The IOIS16# is asserted when the address at the

socket corresponds to an I/O address to which the card responds, and

the I/O port addressed is capable of 16-bit access.

INPACK#

124

Input Port Acknowledge : The signal is asserted when the AX88190A

is selected and can respond to and I/O read cycle at the address on the

address bus.

CE1#-CE2#

18, 17

Card Enable : The CE1# enables even numbered address bytes and

CE2# enables odd numbered address bytes

BVD1_STSCHG#

121

Battery Voltage Detect 1 / Status Change

BVD2_SPKR#

122

Battery Voltage Detect 2 / Audio speaker out

Tab - 1 PCMCIA bus interface signals group

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