is42g32256 ETC-unknow, is42g32256 Datasheet - Page 14

• Manufacturer Part Number: is42g32256
• Description: 256k 16-mbit Synchronous Graphics
• Manufacturer: ETC-unknow

IS42G32256
BASIC FEATURES AND FUNCTION DESCRIPTION
14
DQ (CLOCK
LATENCY = 2)
DQ (CLOCK
LATENCY = 3)
DQ (CLOCK
LATENCY = 2)
DQ (CLOCK
LATENCY = 3)
LATENCY = 2)
LATENCY = 3)
Note:
1. CKE to CLK disable/enable = 1 clock.
Notes:
1. There are four DQMi (i = 0-3).
2. DQM masks data out Hi-Z after two clocks which should be masked by CKE “L”.
COMMAND
COMMAND
DQ (CLOCK
DQ (CLOCK
COMMAND
INTERNAL
Each DQMi masks eight DQs. (One Byte, one Pixel for 8bpp.)
DQM
DQM
CKE
CLK
CLK
CKE
CLK
CLK
1. CLOCK SUSPENDED DURING WRITE (BURST LENGTH = 4)
1. WRITE MASK (BURST LENGTH = 4)
RD
3. DQM WITH CLOCK SUSPEND (FULL PAGE READ)
WR
D0
D0
WR
D0
D0
D1
D1
D1
D1
DQM TO DATA IN MASK = 0 CLK
MASKED BY CKE
Q0
MASKED BY CKE
NOT WRITTEN
D3
D2
D2
HI-Z
HI-Z
NOTE 2
D3
D3
Figure 5. DQM Operation
Figure 4. Clock Suspend
Q2
Q1
2. CLOCK SUSPENDED DURING READ (BURST LENGTH = 4)
2. READ MASK (BURST LENGTH = 4)
RD
RD
HI-Z
HI-Z
Q4
Q3
Q0
Q0
MASKED BY CKE
HI-Z
HI-Z
Q0
Q1
HI-Z
HI-Z
Integrated Silicon Solution, Inc.
MASKED BY CKE
Q1
Q2
Q1
ADVANCE INFORMATION SR037-0C
Q2
Q6
Q5
DQM TO DATA OUT MASK = 2
SUSPENDED DOUT
Q3
Q2
Q2
Q7
Q6
Q3
Q3
Q8
Q7
Q3
ISSI
09/10/98
®