ft232hq Future Technology Devices International Ltd., ft232hq Datasheet - Page 12

• Manufacturer Part Number: ft232hq
• Description: Ft232h Single Channel Hi- Speed Usb To Multipurpose Uart/fifo Ic
• Manufacturer: Future Technology Devices International Ltd.

ACBUS Signal
3.4 ACBUS Signal Option
If the external EEPROM is fitted, the following options can be configured on the CBUS I/O pins using the
software utility
common to both package versions of the FT232H. The default configuration is described in section 7.
Table 3.5 ACBUS Configuration Control
* Must be used with a 10kΩ resistor pull up.
**When in USB suspend mode the outputs clocks are also suspended.
TX&RXLED#
*PWREN#
**CLK7.5
I/O mode
**CLK30
**CLK15
Option
RXLED#
TriSt-PU
DRIVE 1
DRIVE 0
TXLED#
SLEEP#
TXDEN
FT_PROG
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS7,
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS5, ACBUS6,ACBUS8, ACBUS9
Available On ACBUS Pin
Copyright © 2011 Future Technology Devices International Limited
which can be downloaded from the
ACBUS8, ACBUS9
ACBUS8, ACBUS9
ACBUS8, ACBUS9
ACBUS8, ACBUS9
ACBUS8, ACBUS9
ACBUS8, ACBUS9
ACBUS8, ACBUS9
ACBUS8, ACBUS9
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
ACBUS9
ACBUS9
ACBUS9
ACBUS9
TXDEN = (TTL level). Used with RS485 level converters to
enable the line driver during data transmit. TXDEN is
active from one bit time before the start bit is transmitted
on TXD until one bit time after the last stop bit.
Output is low after the device has been configured by
USB, then high during USB suspend mode. This output can
be used to control power to external logic P-Channel logic
level MOSFET switch. Enable the interface pull-down
option when using the PWREN# in this way.*
TXLED = Transmit signalling output. Pulses low when
transmitting data (TXD) to the external device. This can
be connected to an LED.
RXLED = Receive signalling output. Pulses low when
receiving data (RXD) from the external device. This can be
connected to an LED.
LED drive – pulses low when transmitting or receiving data
from or to the external device. See Section 4.11 for more
details.
Goes low during USB suspend mode. Typically used to
power down an external TTL to RS232 level converter IC
in USB to RS232 converter designs.
30MHz Clock output.
15MHz Clock output.
7.5MHz Clock output.
Input Pull Up
Output High
Output Low
ACBUS BitBang
FTDI utilities
page. CBUS signal options are
Description
Document No.: FT_000288
Clearance No.: FTDI #199
Datasheet Version 1.0
12