MPC8315ECVRAGDA datasheet(18/112 Pages) FREESCALE

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MPC8315E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 0

Freescale Semiconductor

DDR and DDR2 SDRAM

Table 10 provides the PLL lock times.

DDR and DDR2 SDRAM

This section describes the DC and AC electrical specifications for the DDR SDRAM interface of the

MPC8315E. Note that DDR SDRAM is GVDD(typ) = 2.5 V and DDR2 SDRAM is GVDD(typ) = 1.8 V.

7.1 DDR and DDR2 SDRAM DC Electrical Characteristics

Table 11 provides the recommended operating conditions for the DDR2 SDRAM component(s) of the

MPC8315E when GVDD(typ) = 1.8 V.

Time for the device to turn on POR config signals with respect to the negation of

HRESET

1—

tPCI_SYNC_IN

1, 3

Notes:

1. tPCI_SYNC_IN is the clock period of the input clock applied to PCI_SYNC_IN. When the device is In PCI host mode the primary

clock is applied to the SYS_CLKIN input, and PCI_SYNC_IN period depends on the value of CFG_SYS_CLKIN_DIV.

2. tSYS_CLKIN is the clock period of the input clock applied to SYS_CLKIN. It is only valid when the device is in PCI host mode.

3. POR configuration signals consists of CFG_RESET_SOURCE[0:3] and CFG_SYS_CLKIN_DIV.

Table 10. PLL Lock Times

Parameter/Condition

Min

Max

Unit

Notes

System PLL lock times

—

100

μs—

e300 core PLL lock times

—

100

μs—

SerDes (SGMII/PCIExp Phy) PLL lock times

—

100

μs—

USB phy PLL lock times

—

100

μs—

SATA phy PLL lock times

—

100

μs—

Table 11. DDR2 SDRAM DC Electrical Characteristics for GVDD(typ) = 1.8 V

Parameter/Condition

Symbol

Min

Max

Unit

Notes

I/O supply voltage

GVDD

1.7

1.9

I/O reference voltage

MVREF

0.49

× GVDD

0.51

× GVDD

I/O termination voltage

VTT

MVREF – 0.04

MVREF + 0.04

Input high voltage

VIH

MVREF+ 0.125

GVDD + 0.3

—

Input low voltage

VIL

–0.3

MVREF – 0.125

—

Output leakage current

IOZ

–9.9

9.9

μA4

Output high current (VOUT = 1.420 V,

GVDD= 1.7V)

IOH

–13.4

—

Table 9. RESET Initialization Timing Specifications (continued)

MPC8315ECVRAGDA датащи(PDF) 18 Page - Freescale Semiconductor, Inc

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