Texas Instruments TSC2007EVM - Manual (Page 3)

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3 Digital Interface
4 Power Supplies
4.1 TSC Power
Digital Interface
The TSC2007EVM is designed to easily interface with multiple control platforms. Samtec part numbers
SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row header/socket
combination at J2. This header/socket provides access to the digital control and serial data pins of the
TSC. Consult Samtec at
www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector
options.
Table 3. Digital Interface Pinout
PIN NUMBER SIGNAL DESCRIPTION
J2.15 PENIRQ Pen Interrupt Output from TSC
J2.16 SCL I 2 C™ bus serial clock
J2.4, J2.10, J2.18 DGND Digital ground
J2.1-J2.19 (odd, except Unused
J2.15)
J2.20 SDA I 2 C bus data line
J3 provides connection to the common power bus for the TSC2007EVM. Power is supplied on the pins
listed in
Table 4 .
Table 4. Power Supply Pinout
SIGNAL PIN NUMBER SIGNAL
Unused 1 2 Unused
Unused 3 4 Unused
DGND 5 6 AGND
+1.8VD 7 8 Unused
+3.3VD 9 10 Unused
When power is supplied to J3, JMP1 allows for one of two different DC voltages to be selected as power
for the TSC. See the schematic and PCB silkscreen for details.
The TSC2007EVM-PDK motherboard (the USB-MODEVM interface board) supplies power to J3 of the
TSC2007EVM. Power for the motherboard is supplied either through its USB connection or via terminal
blocks on the board.
Power for the TSC2007 VCC can be supplied either from the +1.8VD terminal or from the +3.3VD
terminal. JMP1 selects which of these voltages is routed to the TSC2007. When JMP1 is in the default
factory condition (shunt on pins 2-3), power to the TSC comes from J3.9 (+3.3VD). When the shunt is
installed on JMP1 pins 1-2, power comes from J3.7 (+1.8VD). Removing the shunt on JMP1, the user can
connect any DC power supply between 1.2VD and 3.6VD to VCC by connecting the power to JMP1 pin 2.
Table 5. Power Selection Options - JMP1
SHUNT ON PINS VDD VOLTAGE FROM J3 PIN
1-2 +1.8VD 7
2-3 +3.3VD 9
Removed +1.2VD and +3.6VD External
SLAU199 – March 2007 TSC2007EVM and TSC2007EVM-PDK User's Guide 3
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