EM636327Q-7 Etron Technology Inc., EM636327Q-7 Datasheet - Page 8

• Manufacturer Part Number: EM636327Q-7
• Description: 512K x 32 High Speed Synchronous Graphics DRAM(SGRAM)
• Manufacturer: Etron Technology Inc.

Preliminary
CLK
DQM
COM MAND
DQ's
CLK
DQM
COM MAND
CAS# latency=1
t CK1 , DQ's
CAS# latency=2
t CK2 , DQ's
CLK
DQM
COM MAND
CAS# latency=1
t CK1 , DQ's
CAS# latency=2
t CK2 , DQ's
: "H" or "L"
: "H" or "L"
: "H" or "L"
PrechargeAll command to the same bank. The following figure shows the optimum time that
BankPrecharge/ PrechargeAll command is issued in different CAS# latency.
A read burst without the auto precharge function may be interrupted by a BankPrecharge/
NOP
T0
T0
T0
Read to Write Interval
Read to Write Interval
NOP
NOP
Read to Write Interval
READ A
T 1
T 1
T 1
NOP
NOP
ACTIVATE
READ A
BANKA
NOP
T2
T2
T2
(Burst Length ¡Ù 4, CAS# Latency = 1, 2)
(Burst Length ¡Ù 4, CAS# Latency = 1, 2)
(Burst Length ¡Ù 4, CAS# Latency = 3)
T3
T3
T3
NOP
DOUT A 0
NOP
NOP
8
Must be Hi-Z before
the Write Command
Must be Hi-Z before
the Write Command
DOUT A 0
READ A
NOP
T4
T4
T4
NOP
1 Clk Interval
Must be Hi-Z before
the Write Command
WRITE B
WRITE A
T5
T5
T5
DIN B 0
DIN B 0
DIN A 0
DIN A 0
NOP
WRITE B
DIN B 1
DIN B 1
DIN A 1
DIN A 1
T6
DI NB 0
T6
NOP
T6
NOP
EM636327
T7
T7
NOP
DIN B 2
DIN B 2
T7
DIN A 2
DIN A 2
NOP
DINB 1
NOP
December
DINB 2
DIN B 3
DIN B 3
DIN A 3
DIN A 3
NOP
NOP
NOP
T8
T8
T8
1998