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“DIGITAL I/O” Connector type
The Digital I/O connector is a surface mount 1.25mm pitch connector. It is arranged as 15
pins in each of 2 rows. It is supplied by Hirose and its part number is DF13-30DP1.25V(50). This connector has polarisation against incorrect insertion and mechanical
retention of the mating half.
The mating connector is also supplied by Hirose and has part number DF13-30DS-1.25C
which requires crimp contacts part number DF13-2630SCFA. These crimps are only
available from Hirose in large quantities and require special tooling. Usually if you have
explained at the time of ordering how you will be using your HERON-IO2 module there
will be cabling supplied that suits your needs.
If your requirements change then HUNT ENGINEERING will be able to supply
assemblies or component parts to meet your needs but a charge will apply.
“DIGITAL I/O” Connector Pin out
*
CLKIN0 (1)
GND (3)
CLKIN1 (5)
GND (7)
CLKI2 (9)
GND (11)
CLKI3 (13)
GND (15)
CLKOUT (17)
RT_O (19)
GND (21)
GND (23)
RT_I (25)
DECLB (27)
QECLB (29)
The connector sits against the top surface of the PCB, facing upwards away from the board.
(2) I/O0
(4) I/O1
(6) I/O2
(8) I/O3
(10) I/O4
(12) I/O5
(14) I/O6
(16) I/O7
(18) GND
(20) T1OUT
(22) T2OUT
(24) R2IN
(26) R1IN
(28) DECL
(30) QECL
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Digital I/Os
The digital I/Os are connected directly to I/O pins of the FPGA.
Signals CLKIN0, CLKIN1 AND CLKOUT are connected directly to the FPGA, but
signals CLKI2 and CLKI3 are terminated in 220/330R and buffered prior to the FPGA.
Serial I/Os
The serial I/Os have different uses depending on how the MAX3160 part is configured by
your FPGA program.
To use these serial I/Os you must place the correct UART logic in your FPGA design – the
MAX3160 is just a level converter component.
The signals T1OUT, T2OUT, R1IN and R2IN are the RS232/485 signals from the
MAX3160. A and B indicate which of the two MAX3160s that the signal is associated with.
The signals RT_O and RT_I are connected to the end of 120R termination resistors. The
other ends of those resistors are connected to the T2OUT and R2IN pins of the
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HUNT ENGINEERING HERON-IO2 USER MANUAL