TSC2102
From ArmadeusWiki
Informations about the hardware interface between the i.MXL and the TSC2102. This chip will be available on the DevFull board but anyone should be able to add it to it's DevLight.
Introduction
This chip is a "SMART" 4-Wire Touch Screen Controller with Stereo DAC with HP Amplifier.
Interface
Touchscreen
Configuration and data exchange is done through the SPI bus n°2 (SPI2)
Audio
Configuration through SPI bus and data exchange through SSIA
Signals
| i.MXL/DevLight | TSC2102 | Functionnality |
|---|---|---|
| SPI2_SCLK/REV | SCLK | SPI clock |
| SPI2_TXD/SPL_SPR | MOSI | SPI MasterOut SlaveIn |
| SPI2_RXD_1/PS | MISO | SPI MasterIn SlaveOut |
| PortB 19/SSI1_TXCLK | SSn | SPI Chip select |
| SPI2_SS/PortD 8/CLS | PINT/DAVn | Interrupt |
| Reset (on Reset switch) | RESETn | Global reset signal |
Remark:
- i.MXL/DevLight SPI Chip Select signals are not used by Linux SPI infrastructure; it needs multiple chip select (one for each chip connected on the bus), and so GPIOs are used for that purpose.
- Chip interrupt is on Port D because Port B has already some and interrupt are shared on the same port.
