Cypress CY7C67200 manual USB Features, USB Pins, OTG Features, OTG Pins, GPIO Description

CY7C67200

USB Interface

EZ-OTG has two built-in Host/Peripheral SIEs that each have a single USB transceiver, meeting the USB 2.0 specification requirements for full and low speed (high speed is not support- ed). In Host mode, EZ-OTG supports two downstream ports; each supports control, interrupt, bulk, and isochronous trans- fers. In Peripheral mode, EZ-OTG supports one peripheral port with eight endpoints for each of the two SIEs. Endpoint 0 is dedicated as the control endpoint and only supports control transfers. Endpoints 1 though 7 support Interrupt, bulk (up to 64 bytes per packet), or isochronous transfers (up to 1023 bytes per packet size). EZ-OTG also supports a combination of Host and Peripheral ports simultaneously, as shown in Table 2.

Table 2. USB Port Configuration Options

	Port Configurations	Port 1A	Port 2A
OTG		OTG	–
OTG + 1 Host		OTG	Host
OTG + 1 Peripheral		OTG	Peripheral
1	Host + 1 Peripheral	Host	Peripheral
1	Host + 1 Peripheral	Peripheral	Host
2	Hosts	Host	Host
1	Host	Host	–
1	Host	–	Host
2	Peripherals	Peripheral	Peripheral
1	Peripheral	Peripheral	–
1	Peripheral	–	Peripheral

USB Features

•USB 2.0 compatible for full and low speed

•Up to two downstream USB host ports

•Up to two upstream USB peripheral ports

•Configurable endpoint buffers (pointer and length), must reside in internal RAM

•Up to eight available peripheral endpoints (1 control endpoint)

•Supports Control, Interrupt, Bulk, and Isochronous transfers

•Internal DMA channels for each endpoint

•Internal pull up and pull down resistors

•Internal Series termination resistors on USB data lines

USB Pins

Table 3. USB Interface Pins

Pin Name	Pin Number
DM1A	F2
DP1A	E3
DM2A	C2
DP2A	D3

OTG Interface

EZ-OTG has one USB port that is compatible with the USB On-The-Go supplement to the USB 2.0 specification. The USB OTG port has various hardware features to support Session Request Protocol (SRP) and Host Negotiation Protocol (HNP). OTG is only supported on USB PORT 1A.

OTG Features

•Internal Charge Pump to supply and control VBUS

•VBUS Valid Status (above 4.4V)

•VBUS Status for 2.4V < VBUS < 0.8V

•ID Pin Status

•Switchable 2-Kohm internal discharge resistor on VBUS

•Switchable 500-ohm internal pull-up resistor on VBUS

•Individually switchable internal pull-up and pull-down resistors on the USB data lines

OTG Pins

Table 4. OTG Interface Pins

Pin Name	Pin Number
DM1A	F2
DP1A	E3
OTGVBUS	C1
OTGID	F4
CSwitchA	D1
CSwitchB	D2

General Purpose IO Interface

EZ-OTG has up to 25 GPIO signals available. Several other optional interfaces use GPIO pins as well and may reduce the overall number of available GPIOs.

GPIO Description

All Inputs are sampled asynchronously with state changes oc- curring at a rate of up to two 48 MHz clock cycles. GPIO pins are latched directly into registers, a single flip-flop.

Unused Pin Descriptions

Unused USB pins must be tri-stated with the D+ line pulled high through the internal pull-up resistor and the D– line pulled low through the internal pull-down resistor.

Unused GPIO pins must be configured as outputs and driven low.

UART Interface

EZ-OTG has a built-in UART interface. The UART interface supports data rates from 900 to 115.2K baud. It can be used as a development port or for other interface requirements. The UART interface is exposed through GPIO pins.

Document #: 38-08014 Rev. *G Page 3 of 78

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