40.4 UDPHS Interrupt Status Register


Bit	31	30	29	28	27	26	25	24
	DMA_7	DMA_6	DMA_5	DMA_4	DMA_3	DMA_2	DMA_1
Access	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0


Bit	23	22	21	20	19	18	17	16
	EPT_15	EPT_14	EPT_13	EPT_12	EPT_11	EPT_10	EPT_9	EPT_8
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	EPT_7	EPT_6	EPT_5	EPT_4	EPT_3	EPT_2	EPT_1	EPT_0
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	UPSTR_RES	ENDOFRSM	WAKE_UP	ENDRESET	INT_SOF	MICRO_SOF	DET_SUSPD	SPEED
Access	R	R	R	R	R	R	R	R
Reset	0	0	0	0	0	0	0	0

Bits 25, 26, 27, 28, 29, 30, 31 – DMA_x DMA Channel x Interrupt

Value	Description
0	Reset when the UDPHS_DMASTATUSx interrupt source is cleared.
1	Set by hardware when an interrupt is triggered by the DMA Channelx and this endpoint interrupt is enabled by the DMA_x bit in UDPHS_IEN.

Bits 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 – EPT_x Endpoint x Interrupt (cleared upon USB reset)

Value	Description
0	Reset when the UDPHS_EPTSTAx interrupt source is cleared.
1	Set by hardware when an interrupt is triggered by the UDPHS_EPTSTAx register and this endpoint interrupt is enabled by the EPT_x bit in UDPHS_IEN.

Bit 7 – UPSTR_RES Upstream Resume Interrupt

Value	Description
0	Cleared by setting the UPSTR_RES bit in UDPHS_CLRINT.
1	Set by hardware when the UDPHS controller is sending a resume signal called “upstream resume”. This triggers a UDPHS interrupt when the UPSTR_RES bit is set in UDPHS_IEN.

Bit 6 – ENDOFRSM End Of Resume Interrupt

Value	Description
0	Cleared by setting the ENDOFRSM bit in UDPHS_CLRINT.
1	Set by hardware when the UDPHS controller detects a good end of resume signal initiated by the host. This triggers a UDPHS interrupt when the ENDOFRSM bit is set in UDPHS_IEN.

Bit 5 – WAKE_UP Wake Up CPU Interrupt

Value	Description
0	Cleared by setting the WAKE_UP bit in UDPHS_CLRINT.
1	Set by hardware when the UDPHS controller is in SUSPEND state and is re-activated by a filtered non-idle signal from the UDPHS line (not by an upstream resume). This triggers a UDPHS interrupt when the WAKE_UP bit is set in UDPHS_IEN register. When receiving this interrupt, the user has to enable the device controller clock prior to operation. Note: this interrupt is generated even if the device controller clock is disabled.

Value

Description

0

Cleared by setting the WAKE_UP bit in UDPHS_CLRINT.

1

Set by hardware when the UDPHS controller is in SUSPEND state and is re-activated by a filtered non-idle signal from the UDPHS line (not by an upstream resume). This triggers a UDPHS interrupt when the WAKE_UP bit is set in UDPHS_IEN register. When receiving this interrupt, the user has to enable the device controller clock prior to operation.

Note: this interrupt is generated even if the device controller clock is disabled.

Bit 4 – ENDRESET End Of Reset Interrupt

Value	Description
0	Cleared by setting the ENDRESET bit in UDPHS_CLRINT.
1	Set by hardware when an End Of Reset has been detected by the UDPHS controller. This triggers a UDPHS interrupt when the ENDRESET bit is set in UDPHS_IEN.

Bit 3 – INT_SOF Start Of Frame Interrupt

Note: The Micro Start Of Frame Interrupt (MICRO_SOF), and the Start Of Frame Interrupt (INT_SOF) are not generated at the same time.

Value	Description
0	Cleared by setting the INT_SOF bit in UDPHS_CLRINT.
1	Set by hardware when an UDPHS Start Of Frame PID (SOF) has been detected (every 1 ms) or synthesized by UDPHS. This triggers a UDPHS interrupt when the INT_SOF bit is set in UDPHS_IEN register. In case of detected SOF, in High Speed mode, the MICRO_FRAME_NUMBER field is cleared in UDPHS_FNUM register and the FRAME_NUMBER field is updated.

Bit 2 – MICRO_SOF Micro Start Of Frame Interrupt

Note: The Micro Start Of Frame Interrupt (MICRO_SOF), and the Start Of Frame Interrupt (INT_SOF) are not generated at the same time.

Value	Description
0	Cleared by setting the MICRO_SOF bit in UDPHS_CLRINT register.
1	Set by hardware when an UDPHS micro start of frame PID (SOF) has been detected (every 125 us) or synthesized by UDPHS. This triggers a UDPHS interrupt when the MICRO_SOF bit is set in UDPHS_IEN. In case of detected SOF, the MICRO_FRAME_NUM field in UDPHS_FNUM register is incremented and the FRAME_NUMBER field does not change.

Bit 1 – DET_SUSPD Suspend Interrupt

Value	Description
0	Cleared by setting the DET_SUSPD bit in UDPHS_CLRINT register.
1	Set by hardware when a UDPHS Suspend (Idle bus for three frame periods, a J state for 3 ms) is detected. This triggers a UDPHS interrupt when the DET_SUSPD bit is set in UDPHS_IEN register.