Hi Jean, >> I am actually accessing the master ICH6 SMBus controller's registers and >> memory instead of the slave control on the customized board. According >> to the data sheet of ICH6, it supports block data transfer. > Sure it does, that's not the point. The question is, is the slave > device you are talking to expecting an SMBus block transfer for the > command byte you are using? As I already said, SMBus transactions only > work if the master and client agree on the transaction type. If you are > trying random block reads/writes, no wonder it doesn't work. Yes, the slave device has a TI's MSP430 mixed signal microcontroller which supports block read and write of message/data packets for the SMBus standard protocol. I'm trying to send the command/data packets in data blocks. But our board with the microcontroller was not attached to the PC motherboard during my tests mentioned above. Would this be the cause for transaction errors? --- MK ----------------------------------------- This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review, use, retention, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender by reply email and delete all copies of this message. Also, email is susceptible to data corruption, interception, tampering, unauthorized amendment and viruses. We only send and receive emails on the basis that we are not liable for any such corruption, interception, tampering, amendment or viruses or any consequence thereof.
