mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 104

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

EBDF—External Bus Division Factor
This field defines the frequency division factor between GCLKx and GCLKx_50. CLKOUT
is similar to GCLK2_50. The GCLKx_50 is used by the bus interface and memory controller
to interface with an external system. This field is initialized during hard reset using the hard
reset configuration word described in Section 4.3.1.1 Hard Reset Configuration Word .
DFSYNC—Division Factor for the SYNCCLK
This field sets the VCOOUT frequency division factor for the SYNCCLK signal. Changing
the value of this field does not result in a loss-of-lock condition. This field is cleared by a
power-on or hard reset.
DFBRG—Division Factor of the BRGCLK
This field sets the VCOOUT frequency division factor for the BRGCLK signal. Changing the
value of this field does not result in a loss-of-lock condition. This field is cleared by a
power-on or hard reset.
DFNL—Division Factor Low Frequency
This field sets the VCOOUT frequency division factor for general system clocks to be used
in low-power mode. In low-power mode, the MPC823 automatically switches to the DFNL
frequency. To select the DFNL frequency, load this field with the divide value and set the
CSRC bit. A loss-of-lock condition will not occur when you change the value of this field. This
field is cleared by a power-on or hard reset.
00 = CLKOUT is GCLK2 divided by 1.
01 = CLKOUT is GCLK2 divided by 2.
1x = Reserved.
00 = Divide by 1 (normal operation).
01 = Divide by 4.
10 = Divide by 16.
11 = Divide by 64.
00 = Divide by 1 (normal operation).
01 = Divide by 4.
10 = Divide by 16.
11 = Divide by 64.
000 = Divide by 2.
001 = Divide by 4.
010 = Divide by 8.
011 = Divide by 16.
100 = Divide by 32.
101 = Divide by 64.
110 = Reserved.
111 = Divide by 256.
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Clocks and Power Control
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