MPC5200B Users Guide, Rev. 1
5-14 Freescale Semiconductor
CDM Registers
5.5.3 CDM Bread Crumb Register—MBAR + 0x0208
The CDM Bread Crumb Register is a 32-bit register that is not reset. Its purpose is to let firmware designers leave some status code before
entering a reset condition. Since this register is never reset, the value written is available after the reset condition has ended. There is no
additional functionality to this register.
5.5.4 CDM Configuration Register—MBAR + 0x020C
The CDM Configuration Register contains 3 bits that set IPB_CLK and PCI_CLK ratios.
27 ppc_pll_cfg_0 e300 Core core pll config pins. See also Ta ble 5- 6
28 ppc_pll_cfg_1
29 ppc_pll_cfg_2
30 ppc_pll_cfg_3
31 ppc_pll_cfg_4

Table5-10. CDM Bread Crumb Register

msb 012345678 9 101112131415
R CDM Bread Crumb Register (Never Reset)
W
RESET:— ———————— — — —— —
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
R CDM Bread Crumb Register (Never Reset)
W
RESET:— ———————— — — —— —

Table5-11. CDM Configuration Register

msb 0123456789101112131415
RReserved
Write 0
ddr_
mode
Reserved
Write 0
xlb_
clk_sel
W
RESET: 0 0 0 000000000000V
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
RReserved
Write 0
ipb_
clk_sel
Reserved
Write 0
pci_
clk_sel
W
RESET: 0 0 0 0000100000001
Bit Name Description