AX88195P Datasheet, PDF (37/37 Pages) ASIX Electronics Corporation – 10/100BASE Local CPU Bus Fast Ethernet MAC Controller

AX88195 Local CPU Bus Fast Ethernet MAC Controller
Errata of AX88195 V1
1. 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.
ClrISR :
ClrISRDone:
Mov dx,307h
Mov al,3
; clear Tx/Rx interrupt
Out dx,al
; output to clear ISR
In al,dx
; read ISR
Test al,3
; Check ISR cleared or not
Jz ClrISRDone ; Clear ok
Mov al,0
; if not, clear again
Out dx,al
Jmp ClrISR
…
; clear successful
2. DTACK can’t fit 68K CPU timing in 68K mode
Solution : Using the DTACK automatic insertion function in 68K CPU.
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ASIX ELECTRONICS CORPORATION