ADLINK Technology CoreModule 745, Справочное руководство

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Chapter 3 Hardware
CoreModule 745 Reference Manual 25
Table 3-5 describes the pin signals of the serial port 3 header, which consists of 10 pins, two rows, odd/even
(1, 2) pin sequence, and 0.079" (2mm) pitch.
Note: The shaded table cell denotes power or ground. The * symbol indicates the signal is Active Low.
USB Interface
The CoreModule 745 contains two root USB hubs and four functional USB ports. The ICH8-M provides the
USB function including the following features:
•
Supports USB v.2.0 EHCI and USB v.1.1 UHCI
•
Provides over-current detection status
•
Provides a fuse on board for over current protection
Table 3-6 describes the pin signals of the USB0 and USB1 header which consists of 10 pins, in two rows,
with odd/even (1, 2) pin sequence, and 0.079" (2mm) pitch.
Table 3-5. Serial Port 3 Interface Pin Signal Descriptions (J5)
Pin # Signal DB9 # Description
1 DCD* 1 Data Carrier Detect – Indicates external serial device is detecting a
carrier signal (i.e., a communication channel is currently open). In direct
connect environments, this input is driven by DTR as part of the
DTR/DSR handshake.
2 DSR* 6 Data Set Ready – Indicates external serial device is powered, initialized,
and ready. Used as hardware handshake with DTR for overall readiness.
3 RXD 2 Receive Data – Serial port receive data input is typically held at a logic 1
(mark) when no data is being transmitted, and is held “Off” for a brief
interval after an “On” to “Off” transition on the RTS line to allow the
transmission to complete.
4 RTS* 7 Request To Send – Indicates serial port is ready to transmit data. Used as
hardware handshake with CTS for low level flow control.
5 TXD 3 Transmit Data – Serial port transmit data output is typically held to a
logic 1 when no data is being sent. Typically, a logic 0 (On) must be
present on RTS, CTS, DSR, and DTR before data can be transmitted on
this line.
6 CTS* 8 Clear To Send – Indicates external serial device is ready to receive data.
Used as hardware handshake with RTS for low level flow control.
7 DTR* 4 Data Terminal Ready – Indicates serial port is powered, initialized, and
ready. Used as hardware handshake with DSR for overall readiness.
8 RI* 9 Ring Indicator – Indicates external serial device is detecting a ring
condition. Used by software to initiate operations to answer and open the
communications channel.
9 GND 5 Ground
10 Key/NC NC Key Pin – Not connected
Table 3-6. USB0 and USB1 Interface Pin Signals (J16)
Pin # Signal Description
1 USB-PWR_0 USB0 Power – VCC (+5V +/-5%) power goes to the port through an
on-board fuse. Port is disabled if this input is low.
2 USB-PWR_1 USB1 Power – VCC (+5V +/-5%) power goes to the port through an
on-board fuse. Port is disabled if this input is low.
3 CONN_USB0_N USB0 Port Data Negative