PCI of this chip is 66MHz@32bits.
Theoretically, it only needs 0.093us to transmit 24K bytes.
Hower, It needs 0.093us to transmit 24K bytes.
I don't know what's wrong and how tu deal with it.
I I measured the waveforms of frame and irdy, as shown in the following figure.
Blue signal IRDY, green signal FRAME.
Theoretically, it only needs 93us to transmit 24K bytes.
Hower, It needs 930us to transmit 24K bytes.