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KS8695PX Demo Board Description
Integrated Multi-Port PCI Gateway Solution
4.4.6 GPIO
The KS8695PX features 16 general purpose I/O pins (GPIO). These pins can be use for
external controls, or inputs for use by the KS8695PX. For example, GPIO[7:3] are used
to add a 3
rd
LED per port. GPIO[11:8] are connected to JP5 and can be used to emulate
an SPI interface for peripheral components.
4.5 Power and Ground
Voltage to the Demo Board is supplied through a 5.0 V DC power jack. The dc power is
then translated down to the voltage levels required with Micrel voltage regulators. These
voltage regulators were chosen for stability in evaluation and testing. A mass production
design can use low cost voltage regulators to supply the KS8695PX. The KS8695PX has
the option to use a switching regulator (MIC2193, U10), or an LDO regulator
(MIC29300-3.3BT, U11). Note that both the switching regulator and the LDO should not
be populated on the board at the same time.
Table 6 Voltage Test Points
Voltages Test
Points
V1.8A (Analog RX)
TP1
V1.8 (Digital Core)
TP2
V3.3A (Analog TX)
TP3
V3.3D (KS8695PX digital I/O)
TP4
GND
TP5, TP6, TP7, TP8
