MPC5645S datasheet(113/146 Pages) FREESCALE

Part #	MPC5645S

Description	Qorivva MPC5645S Microcontroller Data Sheet

PDF	146 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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113 / 146 page

Qorivva MPC5645S Microcontroller Data Sheet, Rev. 8

Freescale Semiconductor

113

Figure 27 shows the DDR SDRAM write timing.

Figure 27. DDR write timing

Figure 28 and Figure 29 show the DDR SDRAM read timing.

Figure 28. DDR read timing, DQ vs. DQS

1 V

DDE_DR value is 1.8 V for DDR2 mode, 2.5 V for DDR1 mode, and 1.8 V for LPDDR mode.

2 C

Z at -40, 140, 25

oC.

3 Measured with clock pin loaded with differential 100 ohm termination resistor.

4 All transitions measured at mid-supply (V

DDE_DR/2).

5 Measured with all outputs except the clock loaded with 50 ohm termination resistor to V

DDE_DR/2.

6 In this window, the first rising edge of DQS should occur. From the start of the window to DQS rising edge, DQS should

be low.

7 Window position is given for t

DQSEN = 2.0 tCK. For other values of tDQSEN, window position is shifted accordingly.

MCK

tCH

tCL

DQS

tDQSS

DQ, DM (out)

tDS

tDH

tCK

DQS (in)

Any DQ (in)

tDQSQ

MPC5645S Datasheet(PDF) 113 Page - Freescale Semiconductor, Inc