R8A66597BG RENESAS [Renesas Technology Corp], R8A66597BG Datasheet - Page 123
R8A66597BG
Manufacturer Part Number
R8A66597BG
Description
ASSP (USB2.0 2 Port Host/1 Port Peripheral Controller)
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R8A66597BG.pdf
(185 pages)
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R8A66597FP/DFP/BG
3.2.6
R e v 1 . 0 1
Device State Transition Interrupt
Figure 3.10 provides a diagram of R8A66597device state transitions. The controller manages the device state and
generates the device state transition interrupt. However, return from the suspend state (resume signal detection) is
detected by the resume interrupt. The device state transition interrupt can be enabled or disabled by setting the
INTENB0 register. The device state transition can be confirmed using the INTSTS0 register DVSQ bit.
When transitioning to the default state, the device state transition interrupt is generated after the Reset Handshake
Protocol is completed.
Device state management is only performed when the Peripheral Controller function is selected. In the same manner,
the device state transition interrupt is only generated when the Peripheral Controller function is selected.
Note: S olid line trans itions indicate the DV ST bit will be set to “1”.
Detect USB bus reset
O c t 1 7 , 2 0 0 8
E xecute S etConfiguration
Exec ute SetAddress
Dotted line transitions indicate the RES M bit will be set to “1”.
(ConfigurationValue= 0)
(DVST=’1’)
(A ddress =0)
(DVST=’1’)
Detec t US B bus reset
(DVS T=’1’)
(DV ST= ’1’)
p a g e 1 2 3 o f 1 8 3
(DVSQ="000")
(DVSQ="001")
(DVSQ="010")
(DVSQ="011")
Configured
Powered
Address
Default
state
state
state
state
Figure 3.10 Device State Transitions
E xecute S etAddress
Resume (RESM= ”1”)
Resume (RES M=’1’)
Res ume (RES M=’1’)
Res ume (RES M=’1’)
(Address>0)
(DVST=’1’)
Detect suspend
Ex ec ute SetConfiguration
Detect s us pend
Detec t s uspend
Detec t s uspend
(ConfigurationValue?0)
(DVS T=’1’)
(DVST=’1’)
(DVST=’1’)
(DVST=’1’)
Suspended
(DVSQ="100")
Suspended
(DVSQ="101")
Suspended
(DVSQ="110")
Suspended
(DVSQ="111")
state
state
state
state
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