AN2905 Freescale Semiconductor / Motorola, AN2905 Datasheet

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AN2905

Manufacturer Part Number
AN2905
Description
Clock Mode Selection for MSC8126 Mask Set K98M
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
© Freescale Semiconductor, Inc., 2004. All rights reserved.
Freescale Semiconductor
Application Note
Clock Mode Selection for MSC8126
Mask Set K98M
By Donald Simon and Wes Ray
This application note describes the MSC8126 clock modes for
mask set K98M. It also describes a Microsoft
application that assists users in determining the internal/external
system clock frequencies generated by the input clock and a 5-
bit MODCK value. Mask set K98M supports 27 valid clock
modes, as tested using the 0K98M and 1K98M mask sets. The
Excel application helps you to reduce design time significantly
in two ways:
Quickly determine whether an input clock frequency and
clock mode combination violate frequency limitations.
Evaluate a wide range of input clock frequencies to
determine which combinations meet system requirements.
®
Excel
CONTENTS
1
2
3
4
4.1
4.2
5
6
7
8
Mask Set ..................................................................2
Clock Configuration ................................................2
Clock Modes ...........................................................3
Excel Application ....................................................4
Mask Set K98M Clock Mode Chart Worksheet .....5
Mask Set K98M Clocking Scheme Worksheet .......6
Excel Worksheet Quick Guide ................................7
Errata .......................................................................7
Mask Set K98M Configuration Modes ...................7
References ...............................................................8
Rev. 0, 11/2004
AN2905

Related parts for AN2905

AN2905 Summary of contents

Page 1

... Mask Set ..................................................................2 1 Clock Configuration ................................................2 2 Clock Modes ...........................................................3 3 Excel Application ....................................................4 4 Mask Set K98M Clock Mode Chart Worksheet .....5 4.1 Mask Set K98M Clocking Scheme Worksheet .......6 4.2 Excel Worksheet Quick Guide ................................7 5 Errata .......................................................................7 6 Mask Set K98M Configuration Modes ...................7 7 References ...............................................................8 8 AN2905 Rev. 0, 11/2004 ...

Page 2

Mask Set 1 Mask Set Each MSC8126 device is labeled with a mask set number (for example mask set 1K98M). 2 Clock Configuration Figure 1 shows the functional clock block diagram for mask set K98M. The clock contains an internal ...

Page 3

The DSI has two clearly separated clock zones: • The DSI interfaces with the external host asynchronously or via a synchronous interface clocked by the signal. HCLKIN • The DSI interfaces with the internal local bus via the system bus ...

Page 4

Excel Application SPLL: system phase-lock loop PLLRDF: PLL’s input clock division factor PLLFDF: PLL’s feedback division factor PLLODF: PLL’s output clock division factor BUSDF: 60x bus division factor VCO: voltage control oscillator Division by PLLFDF CLKIN Division by PLLRDF 50 ...

Page 5

The Excel file contains the following two worksheets: • Clock Mode Chart • Clocking Scheme. 4.1 Mask Set K98M Clock Mode Chart Worksheet Figure 4 show the Clock Mode Chart worksheet, which lists the valid clock modes for the mask ...

Page 6

Excel Application 4.2 Mask Set K98M Clocking Scheme Worksheet Figure 5 displays the mask set K98M Clocking Scheme worksheet, which shows the various frequencies, dividers, and multipliers used in the MSC8126 clock module. It requires three entries: • (cell C5) ...

Page 7

Excel Worksheet Quick Guide Table 4 lists the steps for using the Excel worksheets. Step Action 1 Start the Excel program and open the file that corresponds to the MSC8126 mask set. 2 Select a worksheet: • Clock Mode ...

Page 8

References Table 5. Clock Configuration Modes (Continued) Mode References • MSC8126 Technical Data. ...

Page 9

NOTES: Clock Mode Selection for MSC8126 Mask Set K98M, Rev. 0 Freescale Semiconductor References 9 ...

Page 10

References NOTES: Clock Mode Selection for MSC8126 Mask Set K98M, Rev Freescale Semiconductor ...

Page 11

NOTES: Clock Mode Selection for MSC8126 Mask Set K98M, Rev. 0 Freescale Semiconductor References 11 ...

Page 12

... P.O. Box 5405 Denver, Colorado 80217 1-800-441-2447 or 303-675-2140 Fax: 303-675-2150 LDCForFreescaleSemiconductor@hibbertgroup.com AN2905 Rev. 0 11/2004 Information in this document is provided solely to enable system and software implementers to use Freescale Semiconductor products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document ...

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