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H5GQ2H24AFR-R0C 数据表(PDF) 48 Page - Hynix Semiconductor |
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H5GQ2H24AFR-R0C 数据表(HTML) 48 Page - Hynix Semiconductor |
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48 / 172 page ![]() This document is a general product description and is subject to change without notice. Hynix Semiconductor does not assume any responsability for use of circuits described. No patent licenses are implied. Rev. 1.2 /Nov. 2011 48 H5GQ2H24AFR 4.3. MODE REGISTER 2 (MR2) Mode Register 2 defines the output driver (OCD) and termination offsets as shown in Figure 25. Mode Register 2 is programmed via the MODE REGISTER SET (MRS) command with BA0=0, BA1=1, BA2=0 and BA3=0. Figure 25. Mode Register 2 (MR2) Definition Impedance Offsets The driver and termination impedances may be offset individually for PD driver, PU driver, DQ/DBI#/ WCK termination and address/command termination. The offset impedance step values may be non‐ linear and will vary across PVT. With negative offset steps the drive strengths will be decreased and Ron BA3 BA2 BA1 BA0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 00 10 0 ADR/CMD Termination Offset Data and WCK Termination Offset OCD Pullup Driver Offset OCD Pulldown Driver Offset A2 A1 A0 OCD Pulldown Driver Offset 00 0 0 00 1 +1 01 0 +2 01 1 +3 10 0 ‐4 10 1 ‐3 11 0 ‐2 11 1 ‐1 A5 A4 A3 OCD Pullup Driver Offset 00 0 0 00 1 +1 01 0 +2 01 1 +3 10 0 ‐4 10 1 ‐3 11 0 ‐2 11 1 ‐1 A8 A7 A6 Data and WCK Termination Offset 00 0 0 00 1 +1 01 0 +2 01 1 +3 10 0 ‐4 10 1 ‐3 11 0 ‐2 11 1 ‐1 A11 A10 A9 ADR/CMD Termination Offset 00 0 0 00 1 +1 01 0 +2 01 1 +3 10 0 ‐4 10 1 ‐3 11 0 ‐2 11 1 ‐1 |
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