Datasheet
Jumpers
3-3
Operation
3.1.3 I
2
S Selection
The I
2
S bus on the TSC2101 can interface with the onboard host processor,
the TAS1020B USB controller, or with other offboard external I
2
S processor
or devices. When the SW2−1 is set to ON, the manufacture default, the
TSC2101 I
2
S is connected to the TAS1020B’s I
2
S. Otherwise, if the SW2−1
is shifted to OFF, the buffer between the onboard I
2
S ports is disabled so that
an external I
2
S can communicate with the TSC2101 I
2
S port.
3.1.4 MCLK Selection
The TSC2101 needs a proper MCLK for the basic audio ADC/DAC functions.
The onboard processor, TAS1020B, generates an 11.2896-MHz frequency to
provide the MCLK. If an external MCLK is preferred, turn off the SW2−2.
3.1.5 USB Reset
A reset signal output from the onboard TAS1020B processor can be used to
reset the TSC2101 whenever the TAS1020B is resetting. SW2−4
enables/disables the connection. By default, the connection is enabled. If the
processor is not active, the connection to TSC2101 should be disabled by
turning off the SW2−4.
3.1.6 Cap or Capless Headset Interface
Corresponding to the onchip cap or capless headset interface selection, the
EVM has the SW3 built in for use with the different headset interface
configurations. For more details, refer to the TSC2101 data sheet.
3.2 Jumpers
Table 3−2 shows the function of each jumper on the EVM.
Table 3−2.Jumper Function Reference
Reference Desig-
nator
Setting Function Factory Default Subsection
JMP1, JMP2, Removed Power is not provided to the TSC2101
JMP10, JMP11,
JMP12, JMP13
Installed Power is provided to the TSC2101
Installed 3.2.1
1 to 2 MIC BIAS from fixed resistor
JMP3
2 to 3 MIC BIAS from TSC2101
2 to 3 3.2.2
JMP4 Differential MIC input selection Removed 3.2.3
Removed FW boot from external resources
JMP5
Installed FW boot from EEPROM
Installed 3.2.4
1 to 2 EVM board power supply by USB
JMP6
2 to 3 EVM board power supply externally
1 to 2 3.2.5
1 to 2 TSC2101 uses 3.3 V IOVDD
JMP7
2 to 3 TSC2101 uses 1.8 V IOVDD
1 to 2 3.2.6
Removed AUX2 as voltage measurement
JMP8
Installed AUX2 as resistance measurement
Removed
Removed AUX1 as voltage measurement
3.2.7
JMP9
Installed AUX1 as resistance measurement
Removed