MC145220EVK データシートの表示（PDF） - Motorola => Freescale

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MC145220EVK

MC145220EVK Evaluation Board Manual

Motorola => Freescale 

Freescale Semiconductor, Inc.

‘Select from the available options’

ARCHIVTEhDisBisY tFhReEmESaiCnAsLcEreSeEnMoICf OthNeDpUrCogTrOaRm,.INTCh.is20is05where the user enters commands to demonstrate the

capabilities of the various boards connected to the computer. The title of the screen is ‘Select from the

available options’.

This screen is broken down into three sections:

‘Available Boards’

This section displays the board types that are connected to the computer. It also designates which

board is the currently selected ‘target’ board. This is the board that will receive the commands from

‘MC145xxx Commands’ section. This section also provides the ability to change the targeted

board. Type the target board command ([A], [B], or [C]) to target that particular board.

‘MC145xxx Commands’

This section is further divided into three subsections. Each subsection contains commands that can

be sent to the ‘target’ board to demonstrate its capabilities. Each of these commands is described in

full in the Command Summary.

The first subsection, ‘MC145xxx Frequency Commands’, contains commands that are

used to modify the PLL frequency in some way. These commands are available for all pos-

sible target board types.

In the top line of this section, ‘Current Output Frequency is 70 MHz’ designates what the

frequency is for the currently targeted board. This value is dynamic.

On the lines below this, 60 MHz is the current setting for the default low frequency.

70 MHz is the current setting for the default medium frequency. 80 MHz is the current setting

for the default high frequency.

The second subsection, ‘MC145xxx Additional Commands’, contains commands that

are used to further modify the currently targeted board. These commands also work with all

of the MC145xxx board types.

The third subsection, ‘MC145220 EVK – Single Specific Commands’, are only dis-

played when the MC145220EVK in single loop mode is the currently targeted board. This

section shows commands that are specific to this board. This is required since this board

contains the equivalent of two PLLs.

The command letter for ‘Set target PLL on board’ is [T]!. In single loop mode, the user may

toggle between PLL and PLL′ on the MC145220EVK by using this command. Feedback is

given to the user as to whether PLL or PLL′ will be accessed. See near the top of the screen

on the line titled “Available Boards - Current target board is: ...”

‘Initialization/System Setup Commands’

This section contains commands that are used to initialize all boards connected to the computer or

to set up the computer.

MC145220EVK

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