GS81314LQ19 Datasheet, PDF (22/39 Pages) GSI Technology – 144Mb SigmaQuad-IVe™ Burst of 2 Single-Bank ECCRAM™

GS81314LQ19/37GK-933/800
Driver Impedance Control
Programmable Driver Impedance is implemented on the following output signals:
• CQ, CQ, Q, 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, 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*0.2  15%
ODT Impedance Control
Programmable ODT Impedance is implemented on the following input signals:
• CK, CK, KD, KD, SA, R, W, MRW, D.
ODT impedance is programmed by connecting an external resistor RT between the ZT 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
CK, CK
KD, KD
SA
Register Bits
CKZT[1:0] = 00
CKZT[1:0] = 01
CKZT[1:0] = 10
CKZT[1:0] = 11
KDZT[1:0] = 00
KDZT[1:0] = 01
KDZT[1:0] = 10
KDZT[1:0] = 11
AZT[1:0] = 00
AZT[1:0] = 01
AZT[1:0] = 10
AZT[1:0] = 11
Pull-Down Impedance (R_INL)
off
RT  15%
RT*2  20%
reserved
off
RT  15%
RT*2  20%
reserved
off
RT  15%
RT*2  20%
reserved
Pull-Up Impedance (R_INH)
off
RT  15%
RT*2  20%
reserved
off
RT  15%
RT*2  20%
reserved
off
RT  15%
RT*2  20%
reserved
Rev: 1.02 3/2016
22/39
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
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