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3. Register Details
3.3.39
Port0:18Bh / Port1:38Bh H_CTL_SupportControl (Host ControlTransfer Support Control)
Base Address: Port0=000h, Port1=200h
Mode
Ofst Adrs
Register Name
Host
18Bh
H_CTL_Support-
This sets the support function for control transfers over channel CH0 for host operations.
Bit7-6
Reserved
Bit5-4
CTL_SupportState[1:0]
This sets the CTL_SupportGo to "1" and indicates the stage currently running during a transfer
using the control support function.
00: Idle
01: Setup Stage
10: Data Stage
11: Status Stage − Indicates that the status stage is running.
Bit3-1
Reserved
Bit0
CTL_SupportGo
Setting this bit to "1" switches to the setup stage (and data stage) to the status stage automatically
with the control transfer support function using channel CH0.
In the setup stage, a SETUP token is automatically issued, and the requests set in H_CH0SETUP_0
to 7 are sent.
If another data stage follows, the transaction runs automatically with the specified direction and
size.
Finally, in the status stage, an appropriate PID token is automatically issued and a zero-length
packet sent and received depending on the presence of a data stage and the direction.
The H_CH0IntStat register CTL_SupportCmp bit is set once the transactions above and the stage
sequence end normally. If a packet error is detected in mid-sequence, the H_CH0IntStat register
CTL_SupportStop bit is set, and the transaction stops. In this case, the cause is set to the
ConditionCode register to enable inspection.
358
R/W
Bit Symbol
7:
Control
6:
5: CTL_SupportState[1]
R/W
4: CTL_SupportState[0]
3:
2:
1:
R/W
0: CTL_SupportGo
− Indicates that the transfer has not been started or has been completed
without problems.
− Indicates that the setup stage is running.
− Indicates that the data stage is running.
EPSON
Description
0:
1:
0:
1:
ControlTransfer Support State
0:
1:
0:
1:
0:
1:
0: Stand by
1: Control Transfer Go
S2R72V18 Technical Manual (Rev.1.00)
Reset
00h
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