MPC5121E datasheet(75/86 Pages) FREESCALE

75 / 86 page

System Design Information

MPC5121E/MPC5123 Data Sheet, Rev. 1

Freescale Semiconductor

3.3.24

VIU

The Video Input Unit (VIU) is an interface which accepts the ITU656 format compatible video stream.

Figure 56 shows the VIU interface timing and Table 51 lists the timing parameters.

Figure 56. VIU Interface Timing Diagram

System Design Information

4.1

Power Up/Down Sequencing

Power sequencing between the 1.4 V power supply VDD_CORE and the remaing supplies is required to prevent excessive

current during power up phase.

The recommended power sequence is as follows:

•

Use 12V/millisecond or slower time for all supplies.

•

Power up VDD_IO, PLL_AVDD, VBAT_RTC (if not applied permanently), VDD_MEM_IO, AVDD_FUSERD, USB

PHY & SATA PHY supplies first in any order and then power up VDD_CORE. If required AVDD_FUSEWR should

be powered up afterwards.

•

All the supplies must reach the specified operating conditions before the PORESET can be released.

•

For power down, drop AVDD_FUSEWR to 0V first, drop VDD_CORE to 0V, and then drop all other supplies.

•

VDD_CORE should not exceed VDD_IO, VDD_MEM_IO, VBAT_RTC or PLL_AVDDs by more than 0.4 V at any

time, including power-up.

4.2

System and CPU Core AVDD Power Supply Filtering

Each of the independent PLL power supplies require filtering external to the device. The following drawing Figure 57 is a

recommendation for the required filter circuit.

Each circuit should be placed as close as possible to the specific AVDD pin being supplied to minimize noise coupled from

nearby circuits.

All traces should be as low impedance as possible, especially ground pins to the ground plane.

Table 51. VIU Interface Timing Parameters

Parameter

Description

Min

Typ

Max

Unit

SpecID

fPIX_CK

VIU Pixel Clock Frequency

MHz

A24.1

tDSU

VIU Data Setup Time

2.5

A24.2

tDHD

VIU Data Hold Time

2.5

A24.3

fPIX_CLK

tDHD

tDSU

VIU_PIX_CLK

VIU_DATA[9:0]

Preliminary

MPC5121E データシート(PDF) 75 Page - Freescale Semiconductor, Inc

MPC5121E データシート(HTML) 75 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

データシートダウンロード