HYB18T512160A Infineon Technologies AG, HYB18T512160A Datasheet - Page 28

• Manufacturer Part Number: HYB18T512160A
• Description: 512-Mbit Double-Data-Rate-Two SDRAM
• Manufacturer: Infineon Technologies AG

2.3
DDR2 SDRAM supports driver calibration feature and
the flow chart below is an example of the sequence.
Every calibration mode command should be followed
by “OCD calibration mode exit” before any other
Figure 9
Note
1. MRS should be set before entering OCD impedance adjustment and ODT should be carefully controlled
Data Sheet
depending on system environment
Off-Chip Driver (OCD) Impedance Adjustment
OCD Impedance Adjustment Flow Chart
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
BL = 4 code input to all DQs
DQ & DQS High; DQS Low
Enter Adjust Mode
EMRS: Drive (1)
Inc, Dec or NOP
EMRS:
Start
Test
Need Calibration
ALL OK
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
28
End
command being issued. MRS should be set before
entering OCD impedance adjustment and On Die
Termination (ODT) should be carefully controlled
depending on system environment.
512-Mbit Double-Data-Rate-Two SDRAM
HYB18T512[400/800/160]A[C/F]–[3.7/5]
ALL OK
EMRS: OCD calibration mode exit
EMRS: OCD calibration mode exit
BL = 4 code input to all DQs
DQ & DQS Low; DQS High
Enter Adjust Mode
EMRS: Drive (0)
Inc, Dec or NOP
EMRS:
Test
Need Calibration
Functional Description
09112003-SDM9-IQ3P
Rev. 1.13, 2004-05
MPFT0020