ax88190 ASIX Electronics Corporation, ax88190 Datasheet - Page 38

• Manufacturer Part Number: ax88190
• Description: Pcmcia 10/100m Fast Ethernet Mac Controller
• Manufacturer: ASIX Electronics Corporation

AX88190
1. OE# synchronous problem result in PC hang
Solution : Using hardware CKT to pre-sync OE# signal as below.
2. Interrupt Status can’t always clean up
Solution : Using software to do clean and check iteration until clean up.
Ex : IOBASE=300 ; Clear Tx/Rx interrupt.
3. CE1# Bus decoder problem
Solution : Dis-connect AX88190 CE1# (pin 18) from PCMCIA connector CE1#
From PCMCIA
Connector
Pin 9
From AX88190
Pin 101
CLK25M
OE_#
ClrISR :
ClrISRDone:
(pin 7). And connect AX88190 CE1# (pin 18) to logic “0” always
enable this signal.
1
2
U2A
74F86
Errata of AX88190 V1
PCMCIA Fast Ethernet MAC Controller
Mov dx,307h
Mov al,3
Out dx,al
In al,dx
Test al,3
Jz ClrISRDone ; Clear ok
Mov al,0
Out dx,al
Jmp ClrISR
…
3
38
Jumper for future use
12
11
2
3
D
CLK
D
CLK
; clear Tx/Rx interrupt
; output to clear ISR
; read ISR
; Check ISR cleared or not
; if not, clear again
; clear successful
ASIX ELECTRONICS CORPORATION
Q
Q
Q
Q
U1A
74F74
U1B
74F74
5
6
9
8
To AX88190
Pin 16
OE_M#