ax88790 ASIX Electronics Corporation, ax88790 Datasheet - Page 7

• Manufacturer Part Number: ax88790
• Description: Pcmcia 10/100m Fast Ethernet Controller With Embedded Phy
• Manufacturer: ASIX Electronics Corporation

2.0 Signal Description
2.1 PCMCIA Bus Interface Signals Group
SA[9:0]
SD[15:0]
IREQ#
WAIT#
REG#
IORD#
IOWR#
OE#
WE#
IOIS16#
INPACK#
CE1#-CE2#
STSCHG#
SPKR#
Tab - 1 PCMCIA bus interface signals group
All pin names with the “#” suffix are asserted low.
The following abbreviations are used in following Tables.
The following terms describe the AX88790 pin-out:
SIGNAL
I/O
OD
O
I
AX88790 L
Input
Output
Input/Output
Open Drain
I/O/PD
TYPE
I/PD
I/PU
I/PU
I/PU
I/PU
I/PU
I/PU
O
O
O
O
O
O
PIN NO.
23 – 26,
35 – 39,
29 – 33,
41 – 42
12 – 4
22, 21
128
123
124
125
15,
16
19
18
20
17
2
1
System Address: Signals SA[9:0] are address bus input lines which
enable direct address of up to 2K memory and I/O spaces on card.
System Data Bus: Signals SD[15:0] constitute the bi-directional data
bus.
Interrupt Request: IREQ# is asserted to indicate the host system that
the PC Card device requires host software service.
Wait: This signal is set low to insert wait states during Remote DMA
transfer.
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.
I/O Read: The host asserts IORD# to read data from AX88790 I/O
space.
I/O Write: The host asserts IOWR# to write data into AX88790 I/O
space.
Output Enable : The OE# line is used to gate Memory Read data from
memory on PC Card
Write Enable: The WE# signal is used for strobing Memory Write
data into the memory on PC Card.
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.
Input Port Acknowledge: The signal is asserted when the AX88790 is
selected and can respond to and I/O read cycle at the address on the
address bus.
Card Enable : The CE1# enables even numbered address bytes and
CE2# enables odd numbered address bytes
Battery Voltage Detect 1 / Status Change
Battery Voltage Detect 2 / Audio speaker out
3-in-1 PCMCIA Fast Ethernet Controller
7
PU
PD
P
DESCRIPTION
ASIX ELECTRONICS CORPORATION
Pull Up
Pull Down
Power Pin