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AS4C64M16D2 Datasheet(PDF) 11 Page - Alliance Semiconductor Corporation |
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AS4C64M16D2 Datasheet(HTML) 11 Page - Alliance Semiconductor Corporation |
11 / 58 page AS4C64M16D2 Alliance Memory Inc. reserves the right to change products or specification without notice. 11 Rev. 1.1 April. /2012 Table 4. Extended Mode Register EMR (1) Bitmap BA2 BA1 BA0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 Address Field 0 *3 0 1 Qoff 0 *3 DQS# OCD program Rtt Additive Latency Rtt D.I.C DLL Extended Mode Register BA1 BA0 MRS mode A6 A2 Rtt(NOMINAL) 0 0 MR 0 0 ODT Disable A0 DLL Enable 0 1 EMR(1) 0 1 75Ω 0 Enable 1 0 EMR(2) 1 0 150Ω 1 Disable 1 1 EMR(3) 1 1 50Ω A9 A8 A7 OCD Calibration Program A1 Output Driver Impedance Control 0 0 0 OCD Calibration mode exit; maintain setting 0 0 1 Reserved 0 Full strength 0 1 0 Reserved 1 Reduced strength 1 0 0 Reserved 1 1 1 OCD Calibration default *1 A5 A4 A3 Additive Latency 0 0 0 0 A12 Qoff *2 0 0 1 1 0 Output buffer enabled 0 1 0 2 A10 DQS# 1 Output buffer disabled 0 1 1 3 0 Enable 1 0 0 4 1 Disable 1 0 1 5 1 1 0 Reserved 1 1 1 Reserved NOTE 1: After setting to default, OCD calibration mode needs to be exited by setting A9-A7 to 000. NOTE 2: Output disabled – DQs, DQSs, DQSs#.This feature is intended to be used during IDD characterization of read current. NOTE 3: A11 and BA2 are reserved for future use and must be set to 0 when programming the MR. |
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