Cypress CY7C67200 manual OTG Control Register 0xC098 R/W, C098H

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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