Chandru84 K

Wat DDR2 frequencies r supported for CCB_CLK=400MHz

Discussion created by Chandru84 K on Feb 2, 2010
Latest reply on Jun 23, 2010 by Raghavendra Thekkibettu

Hello,

Im using MPC8548E processor with SYSCLK as 100MHz, CCB CLK:smileyfrustrated:YSCLK = 4:1 and CORE:CCB CLK = 3:1. so the CCB_CLK will be 400 MHz.I have planned to use DDR2 memory, what DDR2 frequency will the system support? Will it be 400MHz/2 = 200MHz?

OR

Referring to the section 6.2.2 DDR SDRAM Output AC Timing Specifications of MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications the tMCK is 3.75ns does this mean that the processor will support a DDR2 with frequency 1/3.75ns = 266MHz??

Kindly help in this regard,

Thankingyou

Regards
Chandru

 

 

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