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FT240XQ-R 데이터시트(PDF) 11 Page - List of Unclassifed Manufacturers

부품명 FT240XQ-R
상세설명  Future Technology Devices International Ltd
PDF  40 Pages
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Copyright © 2013 Future Technology Devices International Limited
11
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.3
Document No.: FT_000626 Clearance No.:
FTDI# 259
3.5 CBUS Signal Options
The following options can be configured on the CBUS I/O pins. CBUS signal options are common to both
package versions of the FT240X. These options can be configured in the internal MTP memory using the
software utility FT_PPROG, which can be downloaded from the FTDI Utilities (www.ftdichip.com). The
default configuration is described in Section 8.
CBUS
Signal
Option
Available On CBUS Pin
Description
TRI-STATE
CBUS5, CBUS6
IO Pad is tri-stated
DRIVE 1
CBUS5, CBUS6
Output a constant 1
DRIVE 0
CBUS5, CBUS6
Output a constant 0
PWREN#
CBUS5, CBUS6
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.
SLEEP#
CBUS5, CBUS6
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.
CLK24MHz
CBUS5, CBUS6
24 MHz Clock output.*
CLK12MHz
CBUS5, CBUS6
12 MHz Clock output.*
CLK6MHz
CBUS5, CBUS6
6 MHz Clock output.*
BCD Charger
CBUS5, CBUS6
Battery charge Detect, indicates when the device is
connected to a dedicated battery charger host. Active high
output.
BCD
Charger#
CBUS5, CBUS6
Inverse of BCD Charger
BitBang_WR#
CBUS5, CBUS6
Synchronous and asynchronous bit bang mode WR#
strobe output.
BitBang_RD#
CBUS5, CBUS6
Synchronous and asynchronous bit bang mode RD# strobe
output.
VBUS Sense
CBUS5, CBUS6
Input to detect when VBUS is present.
Time Stamp
CBUS5, CBUS6
Toggle signal which changes state each time a USB SOF is
received
Keep_Awake#
CBUS5, CBUS6
Prevents the device from entering suspend state when
unplugged.
Table 3.9 CBUS Configuration Control
*When in USB suspend mode the outputs clocks are also suspended.



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