DLP-2232M-G DLP Design Inc, DLP-2232M-G Datasheet - Page 4

• Manufacturer Part Number: DLP-2232M-G
• Description: MODULE USB ADAPTER FOR FT2232D
• Manufacturer: DLP Design Inc

Specifications of DLP-2232M-G

• Main Purpose: Interface, USB 2.0 to UART (RS232) Bridge
• Embedded: No
• Utilized Ic / Part: FT2232D
• Primary Attributes: Full Speed USB to High-Speed UART
• Secondary Attributes: Royalty-Free Drivers, 2K EEPROM
• Interface Type: USB
• Data Bus Width: 8 bit
• Operating Supply Voltage: 4.35 V to 5.25 V
• Product: Interface Modules
• For Use With/related Products: FT2232D
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 813-1000

2.0 Features and Enhancements
The DLP-2232M-G incorporates all of the enhancements introduced for the second
generation DLP-USB232M and DLP-USB245M modules, summarized here:
• Two Individually Configurable IO Channels
Each of the DLP-2232M-G’s Channels (A and B) can be individually configured as a
DLP-USB232M-style UART interface, or as a DL-USB245M-style FIFO interface.
Additionally, these channels can be configured in a number of special IO modes.
• Integrated Power-On-Reset (POR) circuit
The module incorporates an internal POR function. A RESET# pin is available to allow
external logic to reset the module where required, however for most applications this pin
can simply be left disconnected as the RESET input to the FT2232D is pulled to VCC
through a 47K resistor. A RSTOUT# pin is provided in order to allow the new POR
circuit to provide a stable reset to external MCU and other devices.
• Integrated level converter on UART / FIFO interface and control signals
Each channel of the DLP-2232M-G has its own independent VCCIO pin that can be
supplied by between 3V to 5V. This allows each channel’s output voltage drive level to
be individually configured. Thus allowing, for example, 3.3V logic to be interfaced to
the device without the need for external level converter I.C.’s.
• Improved power management control for high-power USB Bus Powered devices
The PWREN# pin of the FT2232D directly drives a P-Channel MOSFET for applications
where power switching of external circuitry is required. The BM pull down enable
feature (configured in the external EEPROM) is also retained. This will make the
module gently pull down on the FIFO / UART IO lines when the power is shut off
(PWREN# is high). In this mode, any residual voltage on external circuitry is bled to
GND when power is removed, thus ensuring that external circuitry controlled by
PWREN# resets reliably when power is restored.
• Support for Isochronous USB Transfers
Whilst USB Bulk transfer is usually the best choice for data transfer, the scheduling time
of the data is not guaranteed. For applications where scheduling latency takes priority
over data integrity such as transferring audio and low bandwidth video data, the DLP-
2232M-G offers the option of USB Isochronous transfer via configuration of bit in the
EEPROM.
• Send Immediate / Wake Up Signal Pin on each channel
There is a Send Immediate / Wake Up (SI/WU) signal pin on each of the two channels.
These combine two functions on one pin. If USB is in suspend mode (and remote
wakeup is enabled in the EEPROM), strobing this pin low will cause the device to
request a resume from suspend (WakeUp) on the USB Bus. Normally, this can be used
to wake up the Host PC. During normal operation, if this pin is strobed low any data in
the device RX buffer will be sent out over USB on the next Bulk-IN request from the
Rev 1.6 (May 2009)
4
DLP-2232M-G DLP Design, Inc.