CY7C6730
PRELIMINARY
Document #: 38-08015 Rev. *D Page 44 of 120
1: Enable pull-up/pull-down resistors.
0: Disable pull-up/pull-down resistors
Port B Force D± State (Bits [6:5])
The Port B Force D± State field controls the forcing state of the D+ D– data lines for Port B. This field will force the state of the
Port B data lines independent of the Port Select bit setting. See Table 7-7 for details.
Port A Force D± State (Bits [4:3])
The Port A Force D± State field controls the forcing state of the D+ D– data lines for Port A. This field will force the state of the
Port A data lines independent of the Port Select bit setting. See Table 7-7 for details.
Suspend Enable (Bit 2)
The Suspend Enable bit enables or disables the suspend feature on both ports. When suspend is enabled the USB transceivers
are powered down and can not transmit or received USB packets but can still monitor for a wakeup condition.
1: Enable suspend.
0: Disable suspend.
Port B SOF/EOP Enable (Bit 1)
The Port B SOF/EOP Enable bit is only applicable in host mode. In device mode this bit should be written as ‘0’. In host mode
this bit enables or disables SOFs or EOPs for Port B. Either SOFs or EOPs will be generated depending on the LOB bit in the
USB n Control Register when Port B is active.
1: Enable SOFs or EOPs.
0: Disable SOFs or EOPs.
Port A SOF/EOP Enable (Bit 0)
The Port A SOF/EOP Enable bit is only applicable in host mode. In device mode this bit should be written as ‘0’. In host mode
this bit enables or disables SOFs or EOPs for Port A. Either SOFs or EOPs will be generated depending on the LOA bit in the
USB n Control Register when Port A is active.
1: Enable SOFs or EOPs.
0: Disable SOFs or EOPs.
Reserved
All reserved bits should be written as ‘0’.
Table 7-6. USB Data Line Pull-up and Pull-down Resistors
L0A/L0B Mode Select
Port n Resistors
Enable Function
X X 0 Pull-up/Pull-down on D+ and D– Disabled
X 1 1 Pull-down on D+ and D– Enabled
1 0 1 Pull-up on USB D– Enabled
0 0 1 Pull-up on USB D+ Enabled
Table 7-7. Port A/B Force D± State
Port A/B Force D± State Function
0 0 Normal Operation
0 1 Force USB Reset, SE0 State
1 0 Force J-State
11 Force K-State
(76 pages)
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