MXT1664T3-ABESSQTP datasheet(49/98 Pages) MICROCHIP

49 / 98 page

MXT1664T3 2.0

 2018 Microchip Technology Inc.

DS40002054A-page 49

10.0

USB COMMUNICATIONS

The device is a composite USB device with two Human Interface Device (HID) interfaces:

• Interface 0 – This interface provides a Generic HID that allows the host to communicate with the device using the

Object Protocol. The HID identifier string is “Atmel maXTouch Control”. See Section 10.4 “Interface 0 (Generic

HID)” for more details.

• Interface 1 – This interface provides a Digitizer HID that supplies touch information to the Host for passing on to a

PC operating system. This interface is supported by Microsoft Windows without the need for additional software.

The HID identifier string is “Atmel maXTouch Digitizer”. See Section 10.5 “Interface 1 (Digitizer HID)” for more

details.

The topography of the USB device is shown in Figure 10-1.

FIGURE 10-1:

USB TOPOGRAPHY

Communication takes place using Full-speed USB at 12 Mbps.

For more information on the USB HID specifications visit www.usb.org.

10.1

Endpoint Addresses

The endpoint addresses are listed in Table 10-1.

10.2

Composite Device

The composite device is a USB 2.0-compliant USB composite device running at full speed (12 Mbps). It has the

specification shown in Table 10-2 on page 49.

Composite Device

Endpoint 0

(Control)

Interface 1

“Atmel maXTouch Digitizer”

(Digitizer HID)

Endpoint 3

(In)

Interface 0

“Atmel maXTouch Control”

(Generic HID)

Endpoint 1

(In)

Endpoint 2

(Out)

TABLE 10-1:

ENDPOINT ADDRESSES

Endpoint

Direction

Address

Endpoint 0

Bidirectional (control)

–

Endpoint 1

0x81

Endpoint 2

Out

0x02

Endpoint 3

0x83

TABLE 10-2:

DEVICE SPECIFICATION

Parameter

Value

Vendor ID

0x03EB (Microchip Atmel)

Product ID

0x215D (mXT1664T3)

Version ID

16-bit Version & Build Identifier in the form 0xVVBB, where:

VV = Version Major (Upper 4 bits) / Minor (Lower 4 bits)

BB = Build number in BCD format

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