FT4222HQ-C-R datasheet(39/49 Pages) FTDI

39 / 49 page

FT4222H USB2.0 TO QUADSPI/I2C BRIDGE IC

1.3

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

Parameter

Default Value

Notes

Serial Number

None

A unique serial number is generated and

programmed into the OTP memory. Refer to the

Utility FT_Prog for details

Enable Suspend Out

enable

Set GPIO2(pin-15) as USB suspend indicator

Suspend Out Polarity

active-high

Set the polarity on GPIO2 pin for indicating

suspend out. Default is set as active-high.

I2C Slave Address

40h

Set the I2C slave address when I2C Slave function

is enabled. Range from 00h ~ 7Fh

SPI Drive Strength

4mA

Adjustable drive strength for SPI related pins SCK,

MISO/MOSI/IO2/IO3, SS0O. Drive strength can be

set as 4mA, 8mA, 12mA and 16mA

SPI Weak Pullup/Pulldown

disable

Enable the weak pullup / pulldown resistor on the

pin SS(pin-32). Default is disabled (without any

pull).

SPI Slew Rate Enable?

disable

Set the slew rate control for SPI related pins SCK,

MISO, MOSI, SS0O, IO2, IO3. Default is disabled

SPI Suspend Mode

disable(tri-state)

Mode selection for I/O status of SPI related pins

SCK, MISO, MOSI, IO2, IO3, SS0O when USB

suspends. Refer to table 5.8 for defaults.

SPI Suspend

No change

Define the behaviour of SPI related pins MISO,

MOSI, IO2/IO3, SS0O when USB suspend happens.

Behaviour can be set as No change, push-high or

push-low when SPI Suspend Mode is set as Enable

SPI pin control.

GPIO Drive Strength

4mA

Adjustable drive strength for GPIO related pins

GPIO0, GPIO1, GPIO2, GPIO3. Drive strength can

be set as 4mA, 8mA, 12mA and 16mA

GPIO Open Drain

disable

Set the behaviour of GPIO pins as open-drain.

Default is disabled(GPIO acts as push-pull mode)

GPIO Weak Pullup/Pulldown

disable

Enable the weak pullup / pulldown resistor on the

pins GPIO0, GPIO1, GPIO2, GPIO3. Default is

disabled (without any pull).

GPIO Suspend

input(tri-state)

Define the behaviour of GPIO related pins GPIO0,

GPIO1, GPIO2, GPIO3 when suspend happens. Pins

can be set as No change, input as tri-state, push-

high or push-low

BCD_DET Function Disable?

Battery Charger Detection function can be disabled

on BCD_DET pin (pin-31).

BCD_DET Drive Strength

4mA

Adjustable drive strength for BCD_DET pin. Drive

strength can be set as 4mA, 8mA, 12mA and 16mA

BCD_DET Polarity

active-high

Set the polarity on BCD_DET pin for indicating

battery charge detected. Default is set as active-

high.

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