PPC8567CVTAUGGA datasheet(23/139 Pages) FREESCALE

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MPC8568E/MPC8567E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

Freescale Semiconductor

DDR and DDR2 SDRAM

MCS[n] output hold with respect to MCK

tDDKHCX

533 MHz

1.48

—

400 MHz

1.95

—

333 MHz

2.40

—

MCK to MDQS Skew

tDDKHMH

–0.6

0.6

MDQ/MECC/MDM output setup with respect to

MDQS

tDDKHDS,

tDDKLDS

533 MHz

538

—

400 MHz

700

—

333 MHz

900

—

MDQ/MECC/MDM output hold with respect to

MDQS

tDDKHDX,

tDDKLDX

533 MHz

538

—

400 MHz

700

—

333 MHz

900

—

MDQS preamble start

tDDKHMP

–0.5

× tMCK – 0.6

–0.5

× tMCK +0.6

MDQS epilogue end

tDDKHME

–0.6

0.6

Note:

1. The symbols used for timing specifications follow the pattern of t(first two letters of functional block)(signal)(state) (reference)(state) for

inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. Output hold time can be read as DDR timing

(DD) from the rising or falling edge of the reference clock (KH or KL) until the output went invalid (AX or DX). For example,

tDDKHAS symbolizes DDR timing (DD) for the time tMCK memory clock reference (K) goes from the high (H) state until

outputs (A) are setup (S) or output valid time. Also, tDDKLDX symbolizes DDR timing (DD) for the time tMCK memory clock

reference (K) goes low (L) until data outputs (D) are invalid (X) or data output hold time.

2. All MCK/MCK referenced measurements are made from the crossing of the two signals ±0.1 V.

3. ADDR/CMD includes all DDR SDRAM output signals except MCK/MCK, MCS, and MDQ/MECC/MDM/MDQS.

4. Note that tDDKHMH follows the symbol conventions described in note 1. For example, tDDKHMH describes the DDR timing

(DD) from the rising edge of the MCK[n] clock (KH) until the MDQS signal is valid (MH). tDDKHMH can be modified through

control of the DQSS override bits in the TIMING_CFG_2 register. This will typically be set to the same delay as the clock

adjust in the CLK_CNTL register. The timing parameters listed in the table assume that these 2 parameters have been set

to the same adjustment value. See the MPC8568E Integrated Communications Processor Reference Manual for a

description and understanding of the timing modifications enabled by use of these bits.

5. Determined by maximum possible skew between a data strobe (MDQS) and any corresponding bit of data (MDQ), ECC

(MECC), or data mask (MDM). The data strobe should be centered inside of the data eye at the pins of the microprocessor.

6. All outputs are referenced to the rising edge of MCK[n] at the pins of the microprocessor. Note that tDDKHMP follows the

symbol conventions described in note 1.

7. Maximum DDR1 frequency is 400 MHz

Table 20. DDR SDRAM Output AC Timing Specifications (continued)

At recommended operating conditions.

Parameter

Symbol 1

Min

Max

Unit

Notes

PPC8567CVTAUGGA Datasheet(PDF) 23 Page - Freescale Semiconductor, Inc

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