Datasheet

I/O Connector and Signals
3-5
Operation
3.3.4 External Audio Data (I
2
S) Connector
The I
2
S bus, which carries audio data to and from the TSC2100, is brought out
to header J11 and can be connected to external I
2
S devices if the I
2
S interface
to the on-board TAS1020B is disabled.
Table 3−6.Audio Data Connector
Reference Designator Description Pin Number Signal Name
1 MCLK
3 BCLK
5 LRCLK
J11 Audio data (I
2
S) connector
7 I2SDIN
J11 Audio data (I S) connector
9 I2SDOUT
11 PWD/AWDS
2,4,6,8,10,12 Ground
3.3.5 External SPI Connector
The TSC2100 SPI port is brought out to the J12 header. It can be driven by an
external source if the onboard microprocessor is disabled.
Table 3−7.External SPI Connector
Reference
Designator
Description
Pin
Number
Signal
Name
Function
1 NC Not connected
3 SS Slave select for SPI bus.
5 SCLK Serial clock for SPI bus.
J12 External SPI Bus
7 MOSI
Master out, slave in data line for SPI bus. Data
travels to the TSC2100 over this line.
9 MISO
Master in, slave out data line for SPI bus. Data
travels from the TSC2100 over this line.
2, 4, 6, 8, 10 GND Ground
3.3.6 Touch Screen Connectors
A 4-wire touch screen connects to the evm board through connector J2. This
connector is standard on 3M Touch Systems (formerly MicroTouch) TouchTek
4 touch screens. A standard terminal block connection is available on J1 for
those users who have touch screen connectors that do not match the J2
configuration.
Table 3−8.Touch Screen Input
Reference
Designator
Description
Pin
Number
Signal
Name
Function
1 X− Touch screen X− electrode
2 Y+ Touch screen Y+ electrode
J2, J1 Touch screen input
3 X+ Touch screen X+ electrode
4 Y− Touch screen Y− electrode