Cypress CY7C67200 OTG Control Registers, OTG Registers Register Name Address OTG Control Register

CY7C67200

OTG Control Registers

There is one register dedicated for OTG operation. This register is covered in this section and summarized in Table 28.

OTG Control Register [0xC098] [R/W]

Table 28.OTG Registers

Register Name	Address	R/W
OTG Control Register	C098H	R/W

Figure 40. OTG Control Register

Bit #	15	14	13	12	11	10	9	8
Field	Reserved		VBUS	Receive	Charge Pump	VBUS	D+	D–
			Pull-up	Disable	Enable	Discharge	Pull-up	Pull-up
			Enable			Enable	Enable	Enable
Read/Write	-	-	R/W	R/W	R/W	R/W	R/W	R/W
Default	0	0	0	0	0	0	0	0
Bit #	7	6	5	4	3	2	1	0
Field	D+	D–		Reserved		OTG Data	ID	VBUS Valid
	Pull-down	Pull-down				Status	Status	Flag
	Enable	Enable
Read/Write	R/W	R/W	-	-	-	R	R	R
Default	0	0	0	0	0	X	X	X

Register Description

The OTG Control register allows control and monitoring over the OTG port on Port1A.

VBUS Pull-up Enable (Bit 13)

The VBUS Pull-up Enable bit enables or disables a 500 ohm pull-up resistor onto OTG VBus.

1:500 ohm pull-up resistor enabled

0:500 ohm pull-up resistor disabled

Receive Disable (Bit 12)

The Receive Disable bit enables or powers down (disables) the OTG receiver section.

1:OTG receiver powered down and disabled

0:OTG receiver enabled

Charge Pump Enable (Bit 11)

The Charge Pump Enable bit enables or disables the OTG VBus charge pump.

1:OTG VBus charge pump enabled

0:OTG VBus charge pump disabled

VBUS Discharge Enable (Bit 10)

The VBUS Discharge Enable bit enables or disables a 2K-ohm discharge pull-down resistor onto OTG VBus.

1:2K-ohm pull-down resistor enabled

0:2K-ohm pull-down resistor disabled

D+ Pull-up Enable (Bit 9)

The D+ Pull-up Enable bit enables or disables a pull-up resistor on the OTG D+ data line.

1:OTG D+ dataline pull-up resistor enabled

0:OTG D+ dataline pull-up resistor disabled

D– Pull-up Enable (Bit 8)

The D– Pull-up Enable bit enables or disables a pull-up resistor on the OTG D– data line.

1:OTG D– dataline pull-up resistor enabled

0:OTG D– dataline pull-up resistor disabled

D+ Pull-down Enable (Bit 7)

The D+ Pull-down Enable bit enables or disables a pull-down resistor on the OTG D+ data line.

1:OTG D+ dataline pull-down resistor enabled

0:OTG D+ dataline pull-down resistor disabled

D– Pull-down Enable (Bit 6)

The D– Pull-down Enable bit enables or disables a pull-down resistor on the OTG D– data line.

1:OTG D– dataline pull-down resistor enabled

0:OTG D– dataline pull-down resistor disabled

OTG Data Status (Bit 2)

The OTG Data Status bit is a read only bit and indicates the TTL logic state of the OTG VBus pin.

1:OTG VBus is greater than 2.4V

0:OTG VBus is less than 0.8V

ID Status (Bit 1)

The ID Status bit is a read only bit that indicates the state of the OTG ID pin on Port A.

1:OTG ID Pin is not connected directly to ground (>10K ohm)

0:OTG ID Pin is connected directly ground (< 10 ohm)

Document #: 38-08014 Rev. *G Page 39 of 78

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