AM1808AZCED3 datasheet(108/264 Pages) TI

108 / 264 page

AM1808

SPRS653A – FEBRUARY 2010 – REVISED APRIL 2010

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6.11.2 DDR2/mDDR Controller Register Description(s)

Table 6-24. DDR2/mDDR Controller Registers

BYTE ADDRESS

ACRONYM

0xB000 0000

REVID

Revision ID Register

0xB000 0004

SDRSTAT

SDRAM Status Register

0xB000 0008

SDCR

SDRAM Configuration Register

0xB000 000C

SDRCR

SDRAM Refresh Control Register

0xB000 0010

SDTIMR1

SDRAM Timing Register 1

0xB000 0014

SDTIMR2

SDRAM Timing Register 2

0xB000 001C

SDCR2

SDRAM Configuration Register 2

0xB000 0020

PBBPR

Peripheral Bus Burst Priority Register

0xB000 0040

PC1

Performance Counter 1 Registers

0xB000 0044

PC2

Performance Counter 2 Register

0xB000 0048

PCC

Performance Counter Configuration Register

0xB000 004C

PCMRS

Performance Counter Master Region Select Register

0xB000 0050

PCT

Performance Counter Time Register

0xB000 00C0

IRR

Interrupt Raw Register

0xB000 00C4

IMR

Interrupt Mask Register

0xB000 00C8

IMSR

Interrupt Mask Set Register

0xB000 00CC

IMCR

Interrupt Mask Clear Register

0xB000 00E4

DRPYC1R

DDR PHY Control Register 1

0x01E2 C000

VTPIO_CTL

VTP IO Control Register

6.11.3 DDR2/mDDR Interface

This section provides the timing specification for the DDR2/mDDR interface as a PCB design and

manufacturing specification. The design rules constrain PCB trace length, PCB trace skew, signal

integrity, cross-talk, and signal timing. These rules, when followed, result in a reliable DDR2/mDDR

memory system without the need for a complex timing closure process. For more information regarding

guidelines for using this DDR2/mDDR specification, Understanding TI's PCB Routing Rule-Based DDR2

Timing Specification (SPRAAV0).

6.11.3.1 DDR2/mDDR Interface Schematic

Figure 6-16 shows the DDR2/mDDR interface schematic for a single-memory DDR2/mDDR system. The

dual-memory system shown in Figure 6-17. Pin numbers for the device can be obtained from the pin

description section.

108

Peripheral Information and Electrical Specifications

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