FLOYD User Manual rev 1.09
www.diamondsystems.com
Page
14
Serial Port Interfaces
Floyd carrier boards host configurable multi-protocol serial ports that are implemented using transceivers
specific to the carrier board model.
FLD-BB01
:
Multi-protocol serial ports are implemented using an SP336 transceiver.
Both ports can be configured together for RS-232, RS-422, or RS-485
using 2 jumpers on jumper block JP2. Both ports have the same protocol
selection.
FLD-BB02
:
Serial ports are implemented using two SP3243 transceivers and one
ISL83485IBZ transceiver. Port 2 can be configured for either RS-232 or
RS-485 using a jumper on jumper block JP2. Port 1 is fixed RS-232 with
RX/TX signals only.
On both models, 121-ohm line termination resistors for RS-422/485 protocols can be configured with jumpers
on Jumper block JP2.
Serial port 1 is made available on a DB9 male panel mount connector, while serial port12 is terminated on
a 2x10 header along with the GPIO port.
As a special order option, the DB9 connector can configured to provide access to the 8x GPIO signals
instead of serial port 1.
USB Ports
Floyd provides 2x USB 2.0 ports and 1x USB 3.0 port.
2x USB 2.0 ports are available on a vertically stacked dual-port USB 2.0 connector.
The upper USB 2.0 port can be used for programming during recovery mode. Jumper block JP3
is used to select host mode (normal operation) or device mode (programming operation).
1x USB 3.0 port terminates on an upright right-angle USB 3.0 connector. This connector also
supports the USB 2.0 protocol.
Utility Header Connector
A 2x10 Utility Header connector on Floyd implements the Power button, Reset, SPI, Force Recovery, Debug
TTL UART, and I
2
C signals. Momentary switches are also provided along the front board edge for Reset
and Recovery functions. These features can be accessed via either connection.
