Teridian 73S1215F, User Manual

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73S1215F Evaluation Board User Guide UG_1215F_039
14 Rev. 1.8
4 Evaluation Board Hardware Description
4.1 Jumpers, Switches and Modules
Table 2 describes the 73S1215F Evaluation Board jumpers, switches and modules. The Item # in Table 2
references Figure 7 . The default setting refers to setup for running USB-CCID application.
Table 2: Evaluation Board Jumper, Switch and Module Description
Item
#
Schematic
and
Silkscreen
Reference
Default
setting
Name Use
1 J2, J3, J5 No
Connect Banana plugs for
external regulated
power supply Must be used to connect an external regulated
power supply. These inputs are intended to allow
control of the input supply voltage of the board
(e.g. different than 5.0 V and 3.3 V on-board
regulators).
JP5 must be in position “5V EXT” and JP1 must be
in position “5V ”when using this 5 V power supply
input. JP6 must be in position “EXT” ”when using
this 3.3 V power supply input.
The evaluation board is sensitive to the polarity:
One red plug is +3.3 V nominal and the other red plug is +5.0 V. The black plug is ground. The
voltage supply input should be in the range +2.7 V to +3.6 V and 4.75 V to 5.5 V respectively.
2 JP4 Inserted VDD jumper In normal use, a jumper must be inserted in this
header, to connect the +3.3 V power supply of the
board to the VDD pins of the 73S1215F. This
jumper can be replaced by a
µ
A / mA-meter to
measure the actual current drawn by the 73S1215F.
3 JP3 Inserted 3.3 V jumper In normal use, a jumper must be inserted in this
header, to connect the +3.3 V power supply of the
RS-232 transceiver and the 73S8010R. This
jumper can be removed to minimize power
consumption if these devices are not used.
4 JP6 ‘INT’ Jumper:
power supply selection
(#1) A jumper must be inserted to select one of the following
settings:
•
In position “EXT”, the evaluation board 3.3 V is
supplied from the external power supply inputs
(banana plug J3). In this case, the voltage must
be externally regulated
•
In position “INT”, the evaluation board is
powered from the 3.3 V voltage regulator U1.
The regulator can be powered either from the
USB bus power supply (USB-powered
application), or from an external non-regulated
power supply (connector PJ1).
. The power supply line is
directly applied to the board power supply. This
external power supply must not exceed 3.6 V.
5 S1 Main switch This switch turns the power On / Off to the
evaluation board, when the jumper JP1 is in
position “VOUT”. When using a lab regulated
power supply connected to the banana plugs J2
and J3, this switch has no effect.
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