AN2905 Freescale Semiconductor / Motorola, AN2905 Datasheet - Page 4

• Manufacturer Part Number: AN2905
• Description: Clock Mode Selection for MSC8126 Mask Set K98M
• Manufacturer: Freescale Semiconductor / Motorola

Excel Application
4
This section explains how to use the Microsoft Excel file listed in Table 3.
When the Excel file in Table 3 is opened, a window like that shown in Figure 3 appears. Select
enter the spreadsheet.
4
VCO: voltage control oscillator
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
Excel Application
CLKIN
50 MHz
Clock
Mode
13
Division by
PLLFDF
Division by
PLLRDF
MODCK[1–3]
MODCK_H-
011-01
0K98M, 1K98M
Clock Mode Selection for MSC8126 Mask Set K98M, Rev. 0
50 MHz
MSC8126 Mask Set
Figure 3. Opening Clock Spreadsheet in Excel
Figure 2. Mask Set K98M Clocking Example
PFD and
VCO
FDF
2
SPLL
1600 MHz
Table 3. Mask Set K98M Excel File
RDF
2 X PLLODF
Division by
1
VCO
32
MSC8126_Mask_Set_K98M.xls
System Bus/
CLKIN Ratio
800 MHz
2x
Excel File Name
Timers
UART
TDM
DSI
Core/Bus
Ratio
Division
by
BUSDF
Division
by
BUSDF
4x
SC140 Cores
Freescale Semiconductor
System Bus
CLKOUT
E
100 MHz
400 MHz
50 MHz
100 MHz
6.25 MHz
50 MHz
50 MHz
NABLE
M
ACROS
to