[Z] Change Default High Frequency; [U]! Step Frequency Up By Step Size; [D]! Step Frequency Down By Step Size - Motorola MC145220EVK Manual

[Z] Change default high frequency

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To access this command in the program, select a board in the "Define boards to program" screen and
then press [Q]! . This will place you in the "Select from the available options" screen. The command [Z] is
on this screen.
See page 21 of this document for a sample screen shot of this command.
This command prompts the user to input a decimal value in MHz for the default high frequency. The pro-
gram default high value is displayed along with the current value. The user may leave the high frequency
value as is by entering return without a value. The program high default value is dependent on the tar-
geted board type. (See Table 6.)
This value is not sent to the board immediately. It is the value that is sent to the board when the [L] com-
mand is executed.
MC145220 in Single Loop Mode
MC145220 in Dual Loop Mode

[U]! Step frequency up by step size

To access this command in the program, select a board in the "Define boards to program" screen and
then press [Q]! . This will place you in the "Select from the available options" screen. The command [U]!
is on this screen.
See page 21 of this document for a sample screen shot of this command.
This command increments the NCOUNTER and ACOUNTER fields of the A register for the currently
targeted board. This steps up the PLL's frequency by the current step size for the board.
If the currently selected board is an MC145220 in DUAL mode, then the currently targeted PLL on the
board is "stepped". If the MC145220 is in SINGLE mode, then both PLLs on the board are "stepped".

[D]! Step frequency down by step size

To access this command in the program, select a board in the "Define boards to program" screen and
then press [Q]! . This will place you in the "Select from the available options" screen. The command [D]!
is on this screen.
See page 21 of this document for a sample screen shot of this command.
This command decrements the NCOUNTER and ACOUNTER fields of the A register for the currently
targeted board. This is the effect of stepping down the PLL's frequency by the current step size for the
board.
If the currently selected board is an MC145220 in DUAL mode, then the currently targeted PLL on the
board is "stepped". If the MC145220 is in SINGLE mode, then both PLLs on the board are "stepped".
MC145220EVK
36
Freescale Semiconductor, Inc.
Board Type
MC145190
MC145191
MC145192
MC145200
MC145201
MC145202
For More Information On This Product,
Go to: www.freescale.com
Table 6.
Program Default High Frequency
751 MHz
743 MHz
743 MHz
1502 MHz
1486 MHz
1486 MHz
743 MHz (PLL)
820 MHz (PLL )
80 MHz
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