1GB-AUTO-AS4C64M16D3 Datasheet, PDF(69/86 Page) Alliance Semiconductor Corporation – Supports JEDEC clock jitter specification

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1GB-AUTO-AS4C64M16D3 Datasheet, PDF (69/86 Pages) Alliance Semiconductor Corporation – Supports JEDEC clock jitter specification

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1Gb Auto-AS4C64M16D3

Figure 43. WRITE(BC4) to READ (BC4) operation

CK#

Notes 3

COMMAND

WRITE

NOP

Notes 4

ADDRESS

Bank,

Col n

DQS, DQS#

tWPRE

NOP

tWPST

NOP

t Notes 5

WTR

READ

Notes 2

WL = 5

Din

n+1

n+2

n+3

NOTES:

1. BC4, WL = 5, RL = 5.

2. DIN n = data-in from column n.

3. NOP commands are shown for ease of illustration; other commands may be valid at these times.

4. BC4 setting activated by MR0[A1:0 = 10] during WRITE command at T0 and READ command at Tn.

5. tWTR controls the write to read delay to the same device and starts with the first rising clock edge after the last write data shown at T7.

TIME BREAK

TRANSITIONING DATA

RL = 5

Don't Care

Figure 44. WRITE(BC4) to Precharge Operation

CK#

Notes 3

COMMAND

WRITE

NOP

Notes 4

ADDRESS

Bank,

Col n

DQS, DQS#

tWPRE

NOP

tWPST

NOP

t Notes 5

PRE

Notes 2

WL = 5

Din

n+1

n+2

n+3

NOTES:

1. BC4, WL = 5, RL = 5.

2. DIN n = data-in from column n.

3. NOP commands are shown for ease of illustration; other commands may be valid at these times.

4. BC4 setting activated by MR0[A1:0 = 10] during WRITE command at T0.

5. The write recovery time (tWR) referenced from the first rising clock edge after the last write data shown at T7.

tWR specifies the last burst write cycle until the precharge command can be issued to the same bank .

TIME BREAK

TRANSITIONING DATA

Don't Care

Figure 45. WRITE(BC4) OTF to Precharge operation

CK#

Notes 3

COMMAND

WRITE

NOP

Notes 4

ADDRESS

Bank

Col n

DQS, DQS#

Notes 2

WL = 5

tWPRE

4 Clocks

tWPST

Din

n+1

n+2

n+3

NOTES:

1. BC4 OTF, WL = 5 (CWL = 5, AL = 0)

2. DIN n (or b) = data-in from column n.

3. NOP commands are shown for ease of illustration; other commands may be valid at these times.

4. BC4 OTF setting activated by MR0[A1:0 = 01] and A12 = 0 during WRITE command at T0.

5. The write recovery time (tWR) starts at the rising clock edge T9 (4 clocks from T5).

T10

T11

Ta0

Ta1

Ta2

NOP

t Notes 5

PRE

VALID

NOP

TIME BREAK

TRANSITIONING DATA

Don't Care

Confidential

--69/86

Rev.1.0 June 2015

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