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DothesamewithafastmodeI
2
Cdevice:
[0]0x12
[1]0xA0
[2]0x02
[3]0x05
[4]0xAA
[5]0x55
NowwithanSPIdevicewhichusesan8-bitregisteraddress:
[0]0x10
[1]0xA0
[2]0x02
[3]0x05
[4]0xAA
[5]0x55
Nowconsidera16-bitregisteraddress,asfoundonpartsliketheTSC2101.Assumethattheregister
address(commandword)is0x10E0:
[0]0x14
[1]0x10-->Note:theI
2
CaddressnowservesasMSBofregaddr.
[2]0x02
[3]0xE0
[4]0xAA
[5]0x55
Ineachcase,theTAS1020returns,inanHIDinterruptpacket,thefollowing:
[0]interfacebyte|status
status:
REQ_ERROR0x80
INTF_ERROR0x40
REQ_DONE0x20
[1]forI
2
Cinterfaces,theI
2
Caddressassent
forSPIinterfaces,thereadbackdatafromSPIlinefortransmissionofthecorrespondingbyte
[2]lengthassent
[3]forI
2
Cinterfaces,theregaddressassent
forSPIinterfaces,thereadbackdatafromSPIlinefortransmissionofthecorrespondingbyte
[4..60]echoofdatapacketsent
USB-MODEVMProtocol 46SLAU286–June2009
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