Teridian 73S1217F, User Manual, Page: 18 / 34

73S1217F Evaluation Board User’s Guide UG_1217F_040
18 Rev. 2.4
4.2 Test Points
The test point numbers listed in Table 3 refer to the test point numbers shown in the electrical schematic
and in the silkscreen of the PCB (see Section 5 73S1217F Evaluation Board Schematics, PCB Layouts
and Bill of Materials ).
Table 3: Evaluation Board Test Point Description
Test
Point #
Name Use
TP1 LIN Test point to monitor Inductor operation.
TP2 Shutdown Test point to control the enable input on the RX-232 transceiver chip.
TP4 VPC Single-pin test point. VPC signal directly connected to the 73S1217F and its
decoupling capacitors. Can be used to measure integrity of the power
supply of the DC-DC converters of the 73S1217F.
TP6 VDD
2-pin test point, with one ground and one VDD signal directly connected to
the 73S1217F and its decoupling capacitors. Can be used to measure the
integrity of the digital power supply of the 73S1217F, or to add a decoupling
capacitor.
TP10 Smart Card
Contacts –
Interface #1 Header for measurement of the card signals, close to the card connectors.
Contains the card signals VCC1, RST1, CLK1, C81 and C41. Each contact
has its own ground pin on the header.
TP11 to
TP17 GND Ground test points. Can be used for grounding of lab equipment probes.
TP18 Card Detect –
Interface #1 Card detect signal coming directly from the card connectors.
TP21 USR(7:0) Standard 9/8-bit user I/O port of the 73S1217F.
Some of the user I/Os are shared by the extension 73S80xx
daughter board when using an external smart card interface, and
the LCD interface. Only one should be used at a time.
TP22 USB TP22 has 4 pins, connected to the USB D+ and D- wires, as well as 2
grounds.
TP24 VBUS +5 V USB bus. Can be used as a test point for USB voltage presence.
TP25 Smart Card
Contacts –
Interface #2 Header for measurement of the card signals, close to the card connectors.
Contains the card signals VCC2, RST2, CLK2, C42 and C82. Each contact
has its own ground pin on the header.
TP27 ROW[0:5] The row pins used for the keypad interface.
TP29 COL[0:4] The column pins used for the keypad interface.
TP30 INT2
INT3 Interrupt input #2 and #3 of the 73S1217F. This header is close to the
breadboard area for easy wiring.
TP31 RX, TX The TX and RX serial UART I/O signals (3.3 V digital logic level).