FT4232H datasheet(11/43 Pages) FTDI

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Document No.: FT_000060

FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC

Datasheet Version 2.05

Clearance No.: FTDI#78

Pin No.

Name

Type

Description

OSCI

INPUT

Oscillator input.

OSCO

OUTPUT

Oscillator output.

REF

INPUT

Current reference – connect via a 12K Ohm resistor @ 1% to

GND.

INPUT

USB Data Signal Minus.

INPUT

USB Data Signal Plus.

TEST

INPUT

IC test pin – for normal operation should be connected to GND.

RESET#

INPUT

Reset input (active low).

PWREN#

OUTPUT

Active low power-enable output.

PWREN# = 0: Normal operation.

PWREN# =1 : USB SUSPEND mode or device has not been

configured.

This can be used by external circuitry to power down logic when

device is in USB suspend or has not been configured.

SUSPEND#

OUTPUT

Active low when USB is in suspend mode.

Table 3.3 Common Function pins

Pin No.

Name

Type

Description

EECS

I/O

EEPROM – Chip Select. Tri-State during device reset.

EECLK

OUTPUT

Clock signal to EEPROM. Tri-State during device reset. When not in reset,

this outputs the EEPROM clock.

EEDATA

I/O

EEPROM – Data I/O Connect directly to Data-In of the EEPROM and to

Data-Out of the EEPROM via a 2.2K resistor. Also, pull Data-Out of the

EEPROM to VCC via a 10K resistor for correct operation. Tri-State during

device reset.

Table 3.4 EEPROM Interface Group

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