CY7C64013C CY7C64113C
Document #: 38-08001 Rev. *B Page 41 of 51

the firmware recognizes the changes that the SIE might have made during the previous transaction. Note that the setup bit of

the mode register is NOT locked. This means that before writing to the mode register, firmware must first read the register to

make sure that the setup bit is not set (which indicates a setup was received, while processing the current USB request). This

read will of course unlock the register. So care must be taken not to overwrite the register elsewhere.

Table 19-2. Details of Modes for Differing Traffic Conditions (see Table 19-1 for the decode legend)

SETUP (if accepting SETUPs)
Properties of Incoming Packet Changes made by SIE to Internal Registers and Mode Bits
Mode Bits token count buffer dval DTOG DVAL COUNT Setup In Out ACK Mode Bits Response Intr
See Table 19-1 Setup <= 10 data valid updates 1 updates 1 UC UC 1 0 0 0 1 ACK yes
See Table 19-1 Setup > 10 junk x updates updates updates 1 UC UC UC NoChange ignore yes
See Table 19-1 Setup x junk invalid updates 0 updates 1 UC UC UC NoChange ignore yes
Properties of Incoming Packet Changes made by SIE to Internal Registers and Mode Bits
Mode Bits token count buffer dval DTOG DVAL COUNT Setup In Out ACK Mode Bits Response Intr
DISABLED
0 0 0 0 x x UC x UC UC UC UC UC UC UC NoChange ignore no
Nak In/Out
0 0 0 1 Out x UC x UC UC UC UC UC 1 UC NoChange NAK yes
0 0 0 1 In x UC x UC UC UC UC 1 UC UC NoChange NAK yes
Ignore In/Out
0 1 0 0 Out x UC x UC UC UC UC UC UC UC NoChange ignore no
0 1 0 0 In x UC x UC UC UC UC UC UC UC NoChange ignore no
Stall In/Out
0 0 1 1 Out x UC x UC UC UC UC UC 1 UC NoChange Stall yes
0 0 1 1 In x UC x UC UC UC UC 1 UC UC NoChange Stall yes
CONTROL WRITE
Properties of Incoming Packet Changes made by SIE to Internal Registers and Mode Bits
Mode Bits token count buffer dval DTOG DVAL COUNT Setup In Out ACK Mode Bits Response Intr
Normal Out/premature status In
1 0 1 1 Out <= 10 data valid updates 1 updates UC UC 1 1 1 0 1 0 ACK yes
1 0 1 1 Out > 10 junk x updates updates updates UC UC 1 UC NoChange ignore yes
1 0 1 1 Out x junk invalid updates 0 updates UC UC 1 UC NoChange ignore yes
1 0 1 1 In x UC x UC UC UC UC 1 UC 1 NoChange TX 0 yes
NAK Out/premature status In
1 0 1 0 Out <= 10 UC valid UC UC UC UC UC 1 UC NoChange NAK yes
1 0 1 0 Out > 10 UC x UC UC UC UC UC UC UC NoChange ignore no
1 0 1 0 Out x UC invalid UC UC UC UC UC UC UC NoChange ignore no
1 0 1 0 In x UC x UC UC UC UC 1 UC 1 NoChange TX 0 yes
Status In/extra Out
0 1 1 0 Out <= 10 UC valid UC UC UC UC UC 1 UC 0 0 1 1 Stall yes
0 1 1 0 Out > 10 UC x UC UC UC UC UC UC UC NoChange ignore no
0 1 1 0 Out x UC invalid UC UC UC UC UC UC UC NoChange ignore no
0 1 1 0 In x UC x UC UC UC UC 1 UC 1 NoChange TX 0 yes
CONTROL READ
Properties of Incoming Packet Changes made by SIE to Internal Registers and Mode Bits
Mode Bits token count buffer dval DTOG DVAL COUNT Setup In Out ACK Mode Bits Response Intr
Normal In/premature status Out
1 1 1 1 Out 2 UC valid 1 1 updates UC UC 1 1 NoChange ACK yes
1 1 1 1 Out 2 UC valid 0 1 updates UC UC 1 UC 0 0 1 1 Stall yes
1 1 1 1 Out !=2 UC valid updates 1 updates UC UC 1 UC 0 0 1 1 Stall yes
1 1 1 1 Out > 10 UC x UC UC UC UC UC UC UC NoChange ignore no
1 1 1 1 Out x UC invalid UC UC UC UC UC UC UC NoChange ignore no
1 1 1 1 In x UC x UC UC UC UC 1 UC 1 1 1 1 0 ACK (back) yes
Nak In/premature status Out
1 1 1 0 Out 2 UC valid 1 1 updates UC UC 1 1 NoChange ACK yes
1 1 1 0 Out 2 UC valid 0 1 updates UC UC 1 UC 0 0 1 1 Stall yes
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