Nxp Semiconductors UM10237 ユーザーズマニュアル

UM10237_2

© NXP B.V. 2008. All rights reserved.

This chapter describes the EMC registers and provides details required when 
programming the microcontroller. The EMC registers are shown in 

 

CLKOUT[1:0]

Output Follows CCLK

Follows CCLK SDRAM clocks. Used for SDRAM 

devices.

CKEOUT[3:0]

Output 0xF

0x0

SDRAM clock enables. Used for 
SDRAM devices. One is allocated for 
each Chip Select.

DQMOUT[3:0]

Output 0xF

0xF

Data mask output to SDRAMs. Used 
for SDRAM devices and static 
memories.

0xFFE0 8000

EMCControl

Controls operation of the memory controller.

0x1

0x3

R/W

0xFFE0 8004

EMCStatus

Provides EMC status information.

-

0x5

RO

0xFFE0 8008

EMCConfig

Configures operation of the memory controller

-

0x0

R/W

0xFFE0 8020

EMCDynamic Control

Controls dynamic memory operation.

-

0x006 R/W

0xFFE0 8024

EMCDynamic Refresh

Configures dynamic memory refresh operation.

-

0x0

R/W

0xFFE0 8028

EMCDynamic ReadConfig Configures the dynamic memory read strategy.

-

0x0

R/W

0xFFE0 8030

EMCDynamicRP

Selects the precharge command period.

-

0x0F

R/W

0xFFE0 8034

EMCDynamic RAS

Selects the active to precharge command period.

-

0xF

R/W

0xFFE0 8038

EMCDynamic SREX

Selects the self-refresh exit time.

-

0xF

R/W

0xFFE0 803C

EMCDynamic APR

Selects the last-data-out to active command time.

-

0xF

R/W

0xFFE0 8040

EMCDynamic DAL

Selects the data-in to active command time.

-

0xF

R/W

0xFFE0 8044

EMCDynamicWR

Selects the write recovery time.

-

0xF

R/W

0xFFE0 8048

EMCDynamicRC

Selects the active to active command period.

-

0x1F

R/W

0xFFE0 804C

EMCDynamic RFC

Selects the auto-refresh period.

-

0x1F

R/W

0xFFE0 8050

EMCDynamic XSR

Selects the exit self-refresh to active command time.

-

0x1F

R/W

0xFFE0 8054

EMCDynamic RRD

Selects the active bank A to active bank B latency.

-

0xF

R/W

0xFFE0 8058

EMCDynamic MRD

Selects the load mode register to active command time.

-

0xF

R/W

0xFFE0 8080

EMCStatic ExtendedWait

Selects time for long static memory read and write 
transfers.

-

0x0

R/W

0xFFE0 8100

EMCDynamic Config0

Selects the configuration information for dynamic 
memory chip select 0.

-

0x0

R/W

0xFFE0 8104

EMCDynamic RasCas0

Selects the RAS and CAS latencies for dynamic memory 
chip select 0.

-

0x303 R/W

0xFFE0 8120

EMCDynamic Config1

Selects the configuration information for dynamic 
memory chip select 1.

-

0x0

R/W