SSTE32882KA1 Integrated Device Technology, SSTE32882KA1 Datasheet - Page 64

• Manufacturer Part Number: SSTE32882KA1
• Description: 1.25v/1.35v/1.5v Registering Clock Driver With Parity Test And Quad Chip Select
• Manufacturer: Integrated Device Technology

RC9: Power Saving Settings Control Word
RC10: Encoding for RDIMM Operating Speed
The encoding value is used to inform the register the operating speed that it is being run at in a system. It is not an indicator of how fast
1.25V/1.35V/1.5V REGISTERING CLOCK DRIVER WITH PARITY TEST AND QUAD CHIP SELECT
SSTE32882KA1
1.25V/1.35V/1.5V REGISTERING CLOCK DRIVER WITH PARITY TEST AND QUAD CHIP SELECT
DBA1
1
Register output can either be in a Normal Drive Mode, floated, or driven under Weak Drive Mode. A Weak Drive Mode is
a mode in which CA signal output drivers (QxA0-QxAn, QxBA0-QxBAn, QxRAS, QxCAS, QxWE) will be driven 2.5 to
3 times weaker than the Light Drive as specified in RC3, and the SDRAM VIL/VIH DC limit will be maintained. The Weak
Drive Mode entry and exit timing is bounded by tDIS and tEN respectively.
x
x
x
x
1
1
0
1
When all DCS pins are HIGH (i.e. SDRAM is in deselected state), there is no memory access to the DRAM, and the
The SSTE32882KA1 features a weak drive mode, which is a variant of the floating mode set in RC0. If Bit DA4 of RC0 is set
to ‘1’, then Bit DA3 of RC9 selects between floating mode and weak drive mode.
The SSTE32882KA1 register supports different power down modes. By default, the Power Down feature is disabled
(RC9[DBA1]=0). The register ignores CKE Power Down mode setting when this function is disabled. If the CKE Power
Down mode is enabled (RC9[DBA1]=1), then power down is invoked once both DCKE0 and DCKE1 are low. Bit DBA0
selects how IBT and ODT behaves.
DBA0
x
x
x
x
0
1
x
x
Input
DA4
THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE
x
x
0
1
x
x
x
x
DA3
0
1
x
x
x
x
x
x
(when DCSn=high, DA3=1
CKE Power Down Mode
CKE Power Down Mode
and RC0[DA4=1])
Weak Drive Mode
Definition
Reserved
Enable
Floating as defined in RC0 [DA4]
Typical weak drive enabled
Weak Driver Impedance:
70Ω (min), 100Ω (nom), 120Ω (min)
Reserved
Reserved
CKE power down with IBT ON, QxODT is a function
of DxODT
CKE power down with IBT off, QxODT held LOW
Disabled
Enabled
64
Encoding
COMMERCIAL TEMPERATURE RANGE
1
SSTE32882KA1
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