FT4222HQ-C-R datasheet(9/49 Pages) FTDI

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FT4222H USB2.0 TO QUADSPI/I2C BRIDGE IC

1.3

Document No.: FT_001011 Clearance No.: FTDI#405

FT4222H

Pin No.

Pin Name

Type

Description

circuit can be referred to in Section7.4

UGND

USB Analog Ground

RREF

USB peripheral reference voltage input.

Connect 12Kohm +/- 1% resistor to GND.

AI/O

USB peripheral bidirectional DM line.

AI/O

USB peripheral bidirectional DP line.

UGND

USB Analog Ground

VOUT3V3

+3.3V voltage Out

May be used to power VCCIO. When VCCIN is supplied

with 3.3V, this pin is a power input pin. Connect to pin 26.

VCCIN

+5.0V(or 3.3V) supply voltage In

Power source-in to embedded regulator.

AGND

Analog Ground

DGND

Digital Ground

VPP

+6.5V supply voltage In

Power source for Programming embedded OTP. It should

be kept floating or 0V when not in programming mode

VBUS_DET

VBUS detection input. It is a +5.0V tolerant pin

BCD_DET

Battery charger detection indicator output when the

device is connected to a dedicated battery charger port.

Polarity can be defined

SPI slave selection indicator from SPI master. This pin is

active in SPI slave mode. It must be tied to high when SPI

master mode enabled.

Table 3.1 FT4222H Pin Description

**If VCCIN is supplied with 3.3V power input, then VOUT3V3 and VCCIO must also be driven with this

3.3V power source

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