UPD45128163-E datasheet(18/86 Pages) ELPIDA

Part #	UPD45128163-E

Description	128M-bit Synchronous DRAM 4-bank, LVTTL

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Manufacturer	ELPIDA [Elpida Memory]

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18 / 86 page

Data Sheet E0728N10 (Ver. 1.0)

18

µPD45128163-E

5. Initialization

The synchronous DRAM is initialized in the power-on sequence according to the following.

(1)

To stabilize internal circuits, when power is applied, a 100

µs or longer pause must precede any signal toggling.

(2)

After the pause, all banks must be precharged using the Precharge command (The Precharge all banks

command is convenient).

(3)

Once the precharge is completed and the minimum tRP is satisfied, the mode register can be programmed. After

the mode register set cycle, tRSC (2 CLK minimum) pause must be satisfied as well.

(4)

Two or more CBR (Auto) refresh must be performed.

Remarks 1. The sequence of Mode register programming and Refresh above may be transposed.

2. CKE and DQM must be held high until the Precharge command is issued to ensure data-bus Hi-Z.

Similar Part No. - UPD45128163-E

Manufacturer	Part #	Datasheet	Description
Elpida Memory	UPD45128163-A75L	821Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL
	UPD45128163-I	785Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
	UPD45128163-I-E	962Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
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Manufacturer	Part #	Datasheet	Description
NEC	UPD45128441	1Mb / 92P	128M-bit Synchronous DRAM 4-bank, LVTTL
Elpida Memory	UPD45128163-A75L	821Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL
	PD45128441-T	713Kb / 89P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
	UPD45128163-I	785Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
	UPD45128163-T	774Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
	PD45128441-I	710Kb / 89P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
	PD45128163-SU	701Kb / 87P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
	UPD45128163-I-E	962Kb / 86P	128M-bit Synchronous DRAM 4-bank, LVTTL WTR (Wide Temperature Range)
NEC	UPD4564323	1Mb / 84P	64M-bit Synchronous DRAM 4-bank, LVTTL
Elpida Memory	UPD4564163	919Kb / 85P	64M-bit Synchronous DRAM 4-bank, LVTTL