IMX6SDLCEC datasheet(99/169 Pages) NXP

99 / 169 page

Electrical Characteristics

i.MX 6Solo/6DualLite Applications Processors for Consumer Products, Rev. 9, 11/2018

NXP Semiconductors

4.11.10.5.1 Synchronous Controls

The synchronous control changes its value as a function of a system or of an external clock. This control

has a permanent period and a permanent wave form.

There are special physical outputs to provide synchronous controls:

•

The IPP_DISP_CLK is a dedicated base synchronous signal that is used to generate a base display

(component, pixel) clock for a display.

•

The IPUx_DIx_PIN01—IPUx_DIx_PIN07 are general purpose synchronous pins, that can be used

to provide HSYNC, VSYNC, DRDY or any other independent signal to a display.

The IPU has a system of internal binding counters for internal events (such as, HSYNC/VSYNC)

calculation. The internal event (local start point) is synchronized with internal DI_CLK. A suitable control

starts from the local start point with predefined UP and DOWN values to calculate control’s changing

points with half DI_CLK resolution. A full description of the counters system can be found in the IPU

chapter of the i.MX 6Solo/6DualLite Reference Manual (IMX6SDLRM).

4.11.10.5.2 Asynchronous Controls

The asynchronous control is a data-oriented signal that changes its value with an output data according to

additional internal flags coming with the data.

There are special physical outputs to provide asynchronous controls, as follows:

•

The IPUx_DIx_D0_CS and IPUx_DIx_D1_CS pins are dedicated to provide chip select signals to

two displays.

•

The IPUx_DIx_PIN11—IPUx_DIx_PIN17 are general purpose asynchronous pins, that can be

used to provide WR. RD, RS or any other data oriented signal to display.

NOTE

The IPU has independent signal generators for asynchronous signals

toggling. When a DI decides to put a new asynchronous data in the bus, a

new internal start (local start point) is generated. The signals generators

calculate predefined UP and DOWN values to change pins states with half

DI_CLK resolution.

4.11.10.6 Synchronous Interfaces to Standard Active Matrix TFT LCD Panels

4.11.10.6.1 IPU Display Operating Signals

The IPU uses four control signals and data to operate a standard synchronous interface:

•

IPP_DISP_CLK—Clock to display

•

HSYNC—Horizontal synchronization

•

VSYNC—Vertical synchronization

•

DRDY—Active data

All synchronous display controls are generated on the base of an internally generated “local start point”.

The synchronous display controls can be placed on time axis with DI’s offset, up and down parameters.

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