GS81314PD36GK-106I Datasheet, PDF (23/39 Pages) GSI Technology – Burst of 4 Multi-Bank ECCRAM

GS81314PD18/36GK-133/120/106
Driver Impedance Control
Programmable Driver Impedance is implemented on the following output signals:
• CQ, CQ, Q, QINV, QVLD.
Driver impedance is programmed by connecting an external resistor RQ between the ZQ pin and V_SS.
Driver impedance is set to the programmed value within 320K cycles after input clocks are operating within specification and RST
is de-asserted Low. It is updated periodically thereafter to compensate for temperature and voltage fluctuations in the system.
Output Signal
Pull-Down Impedance (R_OUTL)
CQ, CQ, Q, QINV, QVLD
RQ*0.2  15%
Notes:
1. R_OUTL and R_OUTH apply when 175 RQ  225
2. The mismatch between R_OUTL and R_OUTH is less than 10%, guaranteed by design.
Pull-Up Impedance (R_OUTH)
RQ*0.3  15%
ODT Impedance Control
Programmable ODT Impedance is implemented on the following input signals:
• CK, CK, KD, KD, SA, R, W, MRW, D, DINV.
ODT impedance is programmed by connecting an external resistor RQ between the ZQ pin and V_SS.
ODT impedance is set to the programmed value within 320K cycles after input clocks are operating within specification and RST
is de-asserted Low. It is updated periodically thereafter to compensate for temperature and voltage fluctuations in the system.
Input Signal
Register Bit
CK, CK
CKZT = 0
CKZT = 1
KD, KD
KDZT = 0
KDZT = 1
AZT = 0
SA
AZT = 1
R, W, MRW
CZT = 0
CZT = 1
D, DINV
DZT = 0
DZT = 1
Notes:
1. R_INH applies when 175 RQ  225
2. All ODT is disabled during JTAG EXTEST and SAMPLE-Z instructions.
Pull-Up Impedance (R_INH)
off
RQ*0.3  15%
off
RQ*0.3  15%
off
RQ*0.3  15%
off
RQ*0.3  15%
off
RQ*0.3  15%
Rev: 1.09 5/2016
23/39
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
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