User Manual

3-3

V2.0

Application Kit TC3X7 V2.0

2018-06

Application Kit Manual TC3X7

Hardware: Application Kit TC3X7 V2.0

Application Kit Information

The MCP79511/MCP79411 contains also an unique ID in the format EUI-48. This id can be used as mac id for

ethernet if the assembled CPU support ethernet.

For more information about the RTC please see the datasheet of MCP79511/MCP79411.

3.4

XGA Display

The board has an XGA Display with a resolution of 320x240. The display has an ILI9341 display controller. Please

see the datasheet of the display controller for the register of the controller. The display is connected to the the

microcontroller via an SPI to Parallel converter (U201).

The SPI to Parallel converter is based on a statemachine. This state machine is clocked with the clock of SPI, here

SCLK0 (P20.13). Each rising edge of P20.13 will change the state of statemachine. When SLSO08 (P20.6) is not low

then the state machine will go always in the idle state with a valid clock edge.

The backgound light is switched on via port 15 pin 0. An high level on this port pin enable the backgound light.

3.4.1

Write a display register

A single write to any register can be done by a 32 bit transfer of SPI. Make sure that the SLSO08 is low during this

32 bit. Bit 31 must be transfered first.

Bit 31 must be 0, this will be indicate a write access.

Bit 30 must be 0, this will be indicate a single access.

Bit 29...Bit 22 is the 8 bit register number which will be written

Bit 21...Bit 6 is the 16bit value which will be written

Bit 5...Bit 0 are dummy bits which are used to execute the write.

To speedup the writing (e.g. write to ram of display controller) it is possible to make a endless transfer. This is

done by this:

first 10 bit transfer

Bit 9 must be 0, this will be indicate a write access.

Bit 8 must be 1, this will be indicate an endless transfer.

Bit 7...Bit 0 is the 8 bit register number which will be written

Now you need to transfer only 16bit values for the registers. With the first 16 bit value there is no action on the

display. With the second value transfer is a write to the register started. This means after the last value you must

make a dummy transfer to write the last value.

The endless mode can only be leave by a rising edge of SCLK0 with SLSO08 set to high. This can be done by a

dummy transfer to any other chip select or by a transfer from the touch controller.

3.4.2

Read a display register

A single read from any register can be done by a 32 bit transfer of SPI. Make sure that the SLSO08 is low during the

complete transfer.

first transfer has 16 bit:

Bit 15 must be 1, this will be indicate a read access.

Bit 14 must be 0, this will be indicate a single access.

Bit 13...Bit 7 is the 8 bit register number which will be read

Bit 5...Bit 0 are dummy bits to setup the register number.

second transfer must have 26 bits:

Bit 25...Bit 16 are dummy bits which are needed to readout the register value