mpc8309 Freescale Semiconductor, Inc, mpc8309 Datasheet - Page 66

• Manufacturer Part Number: mpc8309
• Description: Powerquicc Ii Pro Integrated Communications Processor Family Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

Clocking
23 Clocking
The primary clock source for the MPC8309 can be one of three inputs,Crystal(SYS_XTAL_IN ), SYS_CLK_IN
or PCI_SYNC_IN, depending on whether the device is configured in PCI host or PCI agent mode,
respectively.
66
SYS_XTAL_OUT
SYS_XTAL_IN
SYS_CLK_IN
Figure 45
CRYSTAL
CFG_CLKIN_DIV
MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0
QE_CLK_IN
shows the internal distribution of clocks within the MPC8309.
Rest of the System
QE PLL
PCI Clock Divider
MPC8309
System
PLL
Figure 45. MPC8309 Clock Subsystem
/n
csb_clk to rest
of the device
CLK Gen
Clock
csb_clk
Unit
e300c3 core
ddr_clk
lbc_clk
Core PLL
qe_clk
to local bus
controller
to DDR
memory
QE Block
core_clk
Divider
/n
Divider
Clock
DDR
Clock
LBC
/2
MEMC_MCK
MEMC_MCK
PCI_SYNC_OUT
PCI_SYNC_IN
PCI_CLK[0:2]
LCLK[0:1]
Freescale Semiconductor
Local Bus
Memory
Device
DDR
Memory
Device