S7G2 datasheet(7/116 Pages) RENESAS

7 / 116 page

R01DS0262EU0100 Rev.1.00

Page 7 of 113

Feb 23, 2016

S7G2

1. Overview

Capacitive Touch Sensing Unit

(CTSU)

The CTSU measures the electrostatic capacitance of the touch sensor. Changes in the

electrostatic capacitance are determined by the software, which enables the CTSU to detect

whether a finger is in contact with the touch sensor. The electrode surface of the touch sensor

is usually enclosed with an electrical conductor so that fingers do not come into direct contact

with the electrodes. See section 50, Capacitive Touch Sensing Unit (CTSU) in User's Manual.

Table 1.12

Graphics

Feature

Functional description

Graphics LCD Controller (GLCDC)

The GLCDC provides multiple functions and supports various data formats and panels. Key

GLCDC features include:

 GPX bus master function for accessing graphics data

 Superimposition of three planes (single color background plane, graphic 1 plane, and

graphic 2 plane)

 Support for many types of 32- or 16-bit per pixel graphics data and 8-, 4-, or 1-bit LUT data

format

 Digital interface signal output supporting a video image size of WVGA or greater.

See section 57, Graphics LCD Controller (GLCDC) in User's Manual.

2D Drawing Engine (DRW)

The 2D Drawing Engine (DRW) provides flexible functions that can support almost any object

geometry rather than being bound to only a few specific geometries such as lines, triangles, or

circles. The edges of every object can be independently blurred or antialiased.

Rasterization is executed at one pixel per clock on the bounding box of the object from left to

right and top to bottom. The DRW can also raster from bottom to top to optimize the

performance in certain cases. In addition, optimization methods are available to avoid

rasterization of many empty pixels of the bounding box.

The distances to the edges of the object are calculated by a set of edge equations for every

pixel of the bounding box. These edge equations can be combined to describe the entire

object.

If a pixel is inside the object, it is selected for rendering. If it is outside it is discarded. If it is on

the edge, an alpha value can be chosen proportional to the distance of the pixel to the nearest

edge for antialiasing.

Every pixel that is selected for rendering can be textured. The resulting aRGB quadruple can

be modified by a general raster operation approach independently for each of the four

channels. The aRGB quadruples can then be blended with one of the multiple blend modes of

the DRW.

The DRW provides two inputs (texture read and framebuffer read), and one output

(framebuffer write).

The internal color format is always aRGB (8888). The color formats from the inputs are

converted to the internal format on read and a conversion back is made on write.

See section 55, 2D Drawing Engine (DRW) in User's Manual.

JPEG Codec (JPEG)

The JPEG Codec (JPEG) incorporates a JPEG codec that conforms to the JPEG baseline

compression and decompression standard. This provides high-speed compression of image

data and high-speed decoding of JPEG data. See section 56, JPEG Codec in User's Manual.

Parallel Data Capture Unit (PDC)

One PDC unit is provided for communicating with external I/O devices, including image

sensors, and transferring parallel data such as an image output from the external I/O device

through the DTC or DMAC to the on-chip SRAM and external address spaces (the CS and

SDRAM areas). See section 44, Parallel Data Capture Unit (PDC) in User's Manual.

Table 1.13

Data processing (1/2)

Feature

Functional description

Cyclic Redundancy Check (CRC)

calculator

The CRC calculator generates CRC codes to detect errors in the data. The bit order of CRC

calculation results can be switched for LSB-first or MSB-first communication. Additionally,

various CRC-generating polynomials are available. The snoop function allows monitoring

reads from and writes to specific addresses. This function is useful in applications that require

CRC code to be generated automatically in certain events, such as monitoring writes to the

serial transmit buffer and reads from the serial receive buffer. See section 40, Cyclic

Redundancy Check (CRC) Calculator in User's Manual.

Data Operation Circuit (DOC)

The DOC compares, adds, and subtracts 16-bit data. See section 51, Data Operation Circuit

(DOC) in User's Manual.

Table 1.11

Human machine interfaces (2/2)

Feature

Functional description

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