IMX53CEC datasheet(99/204 Pages) FREESCALE

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Electrical Characteristics

i.MX53xD Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

4.7.8.8

Asynchronous Interfaces

The following sections describes the types of asynchronous interfaces.

4.7.8.8.1

Standard Parallel Interfaces

The IPU has four signal generator machines for asynchronous signal. Each machine generates IPU’s

internal control levels (0 or 1) by UP and DOWN that are defined in registers. Each asynchronous pin has

a dynamic connection with one of the signal generators. This connection is redefined again with a new

display access (pixel/component). The IPU can generate control signals according to system 80/68

requirements. The burst length is received as a result from predefined behavior of the internal signal

generator machines.

The access to a display is realized by the following:

•

CS (IPP_CS) chip select

•

WR (IPP_PIN_11) write strobe

•

RD (IPP_PIN_12) read strobe

•

RS (IPP_PIN_13) Register select (A0)

Both system 80 and system 68k interfaces are supported for all described modes as depicted in Figure 52,

Figure 53, Figure 54, and Figure 55. The timing images correspond to active-low IPP_CS, WR and RD

signals.

Each asynchronous access is defined by an access size parameter. This parameter can be different between

different kinds of accesses. This parameter defines a length of windows, when suitable controls of the

current access are valid. A pause between two different display accesses can be guaranteed by programing

suitable access sizes. There are no minimal/maximal hold/setup times hard defined by DI. Each control

signal can be switched at any time during access size.

Chroma/Luma Delay Inequality

—

1.0

—

±ns

VIDEO PERFORMANCE IN HD MODE2

Luma Frequency Response

0-30 MHz

–0.2

—

0.2

Chroma Frequency Response

0-15 MHz,

YCbCr 422 mode

–0.2

—

0.2

Luma Nonlinearity

—

3.2

—

Chroma Nonlinearity

—

3.4

—

Luma Signal-to-Noise Ratio

0-30 MHz

—

Chroma Signal-to-Noise Ratio

0-15 MHz

—

1 Guaranteed by design.

2 Guaranteed by characterization.

Table 63. TV Encoder Video Performance Specifications (continued)

Parameter

Conditions

Min

Typ

Max

Unit

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