Datasheet

I/O Connector and Signals
3-7
Operation
3.3.4 Audio Data (I
2
S) Connector
The I
2
S bus, which carries audio data to and from the TSC2101, is connected
to header J13. The I
2
S signals from the on-board host processor (TAS1020B)
can be disabled by turning off the SW2−1. Also refer to the previous section
on switch settings.
Table 3−8.Audio Data Connector
Reference
Designator
Description Pin Number Signal Name
1 MCLK
3 BCLK
5 LRCLK
J13 Audio data (I
2
S) connector
7 I2SDIN
9 I2SDOUT
11 Power down
2, 4, 6, 8, 10, 12 Ground
3.3.5 External SPI Connector
The TSC2101 SPI port is connected to header J14. It can be driven by an
external source if the onboard microprocessor is disabled by turning off the
SW2−3 and removing the A1 select jumper (JMP5). Also refer to the previous
sections on switch and jumper settings.
Table 3−9.External SPI Connector
Reference
Designator
Description
Pin
Number
Signal Name Function
1 RESET Reset line
3 SS Slave select for SPI bus
5 SCLK Serial clock for SPI bus
7 MOSI Master out, slave in data line
J14 External SPI bus
9 MISO Master in, slave out data line
11 PENIRQ Pen down or DAV interrupt line
2, 4, 6, 8,
10, 12
GND Ground