PPC440SP-RNC533C datasheet(58/85 Pages) AMCC

58 / 85 page

PowerPC 440SP Embedded Processor

AMCC Proprietary

Revision 1.23 - Sept 26, 2006

Data Sheet

DDR SDRAM Interface

BA0:2

Bank Address supporting up to eight internal banks.

2.5(1.8)V

DDR SDRAM

BankSel0:1

Selects up to two external DDR SDRAM banks.

2.5(1.8)V

DDR SDRAM

CAS

Column Address Strobe.

2.5(1.8)V

DDR SDRAM

ClkEn0:1

Clock Enable. One for each external bank.

2.5(1.8)V

DDR SDRAM

DM0:8

Memory write data byte lane masks. MEMDM8 is the

byte lane mask for the ECC byte lane.

2.5(1.8)V

DDR SDRAM

DQS0:8

Byte lane data strobe. DQS8 is the data strobe for the

ECC byte lane. These signals are differential pairs.

I/O

2.5(1.8)V

DDR SDRAM

DIFF

ECC0:7

ECC check bits 0:7.

I/O

2.5(1.8)V

DDR SDRAM

MemAddr14:00

Memory address bus.

Note:MemAddr14 is the most significant bit (msb).

2.5(1.8)V

DDR SDRAM

MemClkOut0:1

Subsystem clocks. These signals are differential pairs.

2.5(1.8)V

DDR SDRAM

DIFF

MemData63:00

Memory data bus.

Note:MemData63 is the most significant bit (msb).

I/O

2.5(1.8)V

DDR SDRAM

MemDCFdbkD

Feedback driver, for I/O timing measurements.

2.5(1.8)V

DDR SDRAM

MemDCFdbkR

Feedback receiver. Connect externally to

MemDCFdbkD.

2.5(1.8)V

DDR SDRAM

MemODT0:1

Memory on-die termination control.

2.5(1.8)V

DDR SDRAM

MemVRef0

Memory reference voltage (SVREF) input.

2.5(1.8)V

DDR SDRAM Volt Ref

Rcv

MemVRef1

Memory reference voltage (SVREF) supplemental input.

2.5(1.8)V

DDR SDRAM Volt Ref

Sup

RAS

Row Address Strobe.

2.5(1.8)V

DDR SDRAM

Write Enable.

2.5(1.8)V

DDR SDRAM

Table 6. Signal Functional Description (Sheet 3 of 7)

Notes:

1. Receiver input has hysteresis

2. Must pull up (recommended value is 3k

Ω to 3.3V)

3. Must pull down (recommended value is 1k

Ω)

4. If not used, must pull up (recommended value is 3k

Ω to 3.3V)

5. If not used, must pull down (recommended value is 1k

Ω)

6. Strapping input during reset; pull-up or pull-down required

Signal Name

Description

I/O

Type

Notes

PPC440SP-RNC533C 数据表(PDF) 58 Page - Applied Micro Circuits Corporation

PPC440SP-RNC533C 数据表(HTML) 58 Page - Applied Micro Circuits Corporation

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PPC440SP-RNC533C 数据表(PDF) 58 Page - Applied Micro Circuits Corporation

PPC440SP-RNC533C 数据表(HTML) 58 Page - Applied Micro Circuits Corporation

Html Pages

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