Texas Instruments TSC2301EVM Evaluation Module TSC2301EVM TSC2301EVM Datenbogen
Produktcode
TSC2301EVM
Device Characteristics
1-2
1.1
Device Characteristics
The TSC2301 is a complete PDA analog interface circuit. It contains a
complete 12-bit A/D resistive touch screen converter, including drivers, the
control to measure touch pressure, a 4-by-4 matrix keyboard controller, and
8-bit D/A converter output for LCD contrast control. The TSC2301 interfaces
to the host controller through a standard SPI serial interface. The TSC2301
offers two battery measurement inputs capable of reading battery voltages up
to 6 volts, while operating with only a 2.7-V supply. It also has an on-chip
temperature sensor capable of reading 0.3
complete 12-bit A/D resistive touch screen converter, including drivers, the
control to measure touch pressure, a 4-by-4 matrix keyboard controller, and
8-bit D/A converter output for LCD contrast control. The TSC2301 interfaces
to the host controller through a standard SPI serial interface. The TSC2301
offers two battery measurement inputs capable of reading battery voltages up
to 6 volts, while operating with only a 2.7-V supply. It also has an on-chip
temperature sensor capable of reading 0.3
°
C resolution.
In addition to these features, the TSC2301 has full stereo audio playback and
record capabilities. Access to the DAC and ADC sections of the TSC2301 is
through an I
record capabilities. Access to the DAC and ADC sections of the TSC2301 is
through an I
2
S interface.
1.2
EVM Block Diagram
A block diagram of the TSC2301 evaluation kit is shown in Figure 1-1.
Figure 1-1. TSC2301 Evaluation Kit Block Diagram
14
4
6
5
4
4
KEY
8
KEYPAD
3.3 V
VREG
1 2
1 2
J10
2
J1
13
GPIO
10
9
I2S AUDIO
1 2
J11
10
9
EXT SPI
TAS1020
USB
J8
6-12 VDC
SPI
I2S
GPIO
AUDIO
ANALOG
J6
HEADPHONE OUT
J5
LINE OUT
J4
MIC IN
J3
LINE IN
J12
Y-
X+
Y+
X-
IN2
IN1
VB2
VB1
J14
TSC2301
The digital control interface is through either the USB bus or an external SPI
bus. The onboard microprocessor can be disabled, allowing the external SPI
bus to control the TSC2301.
bus. The onboard microprocessor can be disabled, allowing the external SPI
bus to control the TSC2301.
Power supplies are derived from the USB bus, or may be provided to the kit
through external connectors from an external, user-supplied laboratory power
supply.
through external connectors from an external, user-supplied laboratory power
supply.