
MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
105
Clocking
18 Clocking
This section describes the PLL configuration of the MPC8641. Note that the platform clock is identical to
the MPX clock.
18.1
Clock Ranges
Table 64 provides the clocking specifications for the processor cores and
Table 65 provides the clocking
specifications for the memory bus.
Table 66 provides the clocking for the Platform/MPX bus and
Table 67provides the clocking for the Local bus.
37.This pin is only an output in FIFO mode when used as Rx Flow Control.
38.This pin functions as cfg_dram_type[0 or 1] at reset and MUST BE VALID BEFORE HRESET ASSERTION in device sleep
mode.
39. Should be pulled to ground if unused (such as in FIFO, MII and RMII modes).
41. The phase between the output clocks TSEC1_GTX_CLK and TSEC2_GTX_CLK (ports 1 and 2) is no more than 100 ps.
The phase between the output clocks TSEC3_GTX_CLK and TSEC4_GTX_CLK (ports 3 and 4) is no more than 100 ps.
42. For systems which boot from Local Bus (GPCM)-controlled flash, a pullup on LGPL4 is required.
Special Notes for Single Core Device:
S1. Solder ball for this signal will not be populated in the single core package.
S2. The PLL filter from VDD_Core1 to AVDD_Core1 should be removed. AVDD_Core1 should be pulled to ground with a weak
(2–10 k
S3. This pin should be pulled to GND for the single core device.
S4. No special requirement for this pin on single core device. Pin should be tied to power supply as directed for dual core.
Table 64. Processor Core Clocking Specifications
Characteristic
Maximum Processor Core Frequency
Unit
Notes
1000 MHz
1250MHz
1333MHz
1500 MHz
Min
Max
Min
Max
Min
Max
Min
Max
e600 core processor frequency
800
1000
800
1250
800
1333
800
1500
MHz
1, 2
Notes:
1. Caution: The MPX clock to SYSCLK ratio and e600 core to MPX clock ratio settings must be chosen such that the resulting
SYSCLK frequency, e600 (core) frequency, and MPX clock frequency do not exceed their respective maximum or minimum
for ratio settings.
2. The minimum e600 core frequency is based on the minimum platform clock frequency of 400 MHz.
Table 63. MPC8641 Signal Reference by Functional Block (continued)
Name1
Package Pin Number
Pin Type
Power Supply
Notes