HY5FS123235AFCP datasheet(32/74 Pages) HYNIX

部件名	HY5FS123235AFCP

功能描述	512M (16Mx32) GDDR4 SDRAM

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制造商	HYNIX [Hynix Semiconductor]

网页	http://www.skhynix.com/kor/main.do

标志

32 / 74 page

Rev. 1.2 /June. 2008

32

HY5FS123235AFCP

Table 8 Truth Table – CKE#

Notes

1. CKE#

n is the logic state of CKE# at clock edge n; CKE#n-1 was the state of CKE# at the previous clock edge.

2. Current state is the state of the GDDR4 SDRAM immediately prior to clock edge n.

3. COMMANDn is the command registered at clock edge

n, and ACTIONn is a result of COMMANDn.

4. All states and sequences not shown are illegal or reserved.

5. DESELECT or NOP commands should be issued on any clock edges occurring during the tXSRD period.

A minimum of tDL is needed for the DLL to lock before applying a READ command if the DLL was disabled.

CKE#n-1

CKE#

CURRENT STATE

COMMANDn

ACTIONn

NOTES

H

Power-Down

X

Maintain Power-Down

H

Self Refresh

X

Maintain Self Refresh

H

L

Power-Down

SELECT or NOP

Exit Power-Down

H

L

Self Refresh

DELECT or NOP

Exit Self Refresh

5

L

H

All Banks Idle

DELECT or NOP

Precharge Power-Down Entry

L

H

Bank(s) Active

DELECT or NOP

Active Power-Down Entry

L

H

All Banks Idle

AUTO REFRESH

Self Refresh Entry

L

See Table 9

1-3

Table 9 Truth Table - Current State Bank

n- Command To Bank n

CURRENT STATE

CS#

RAS#

CAS#

WE#

COMMAND/ACTION

NOTES

Any

H

X

DESELECT (NOP/continue previous operation)

L

H

NO OPERATION (NOP/continue previous operation)

L

H

ACTIVE (select and activate row)

Idle

L

H

AUTO REFRESH

4

L

MODE REGISTER SET

4

Row Active

L

H

L

H

READ (select column and start READ burst)

6

L

H

L

WRITE (select column and start WRITE burst)

6

L

H

L

PRECHARGE (deactivate row in bank or banks)

5

Read (Auto Precharge

Disabled)

LHL

H

READ (select column and start new READ burst)

6

L

H

L

WRITE (select column and start WRITE burst)

6, 8

L

H

L

PRECHARGE (only after the READ burst is complete)

5

Write (Auto Precharge

Disabled)

L

H

L

H

READ (select column and start READ burst)

6, 7

L

H

L

WRITE (select column and start new WRITE burst)

6

L

H

L

PRECHARGE (only after the WRITE burst is complete)

5, 7

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