IS66WVD1M16ALL Datasheet, PDF (22/52 Pages) Integrated Silicon Solution, Inc – Single device supports asynchronous and burst operation

IS66WVD1M16ALL
Burst Length (BCR[2:0]) Default = Continuous Burst
Burst lengths define the number of words the device outputs during burst READ and
WRITE operations. The device supports a burst length of four, eight, or sixteen words of
sixteen bits. The device can also be set in continuous burst mode where data is
accessed sequentially up to the end of the row.
Burst Wrap (BCR[3]) Default = No Wrap
The burst-wrap option determines if a 4-, 8-, or 16-word READ or WRITE burst wraps
within the burst length, or steps through sequential addresses if continuous burst
operation is selected in BCR[2:0]. If the wrap option is not enabled, the device accesses
data from sequential addresses up to the end of the row.
Table 4. Sequence and Burst Length
Starting
Address
DEC
0
1
2
3
•••
6
7
•••
14
15
•••
254
255
0
1
2
3
•••
6
7
•••
14
15
•••
254
255
Wrap
BL4
BL8
BCR[3]
“0”
Wrap
“1”
No Wrap
Linear
0-1-2-3
1-2-3-0
2-3-0-1
3-0-1-2
•••
6-7-4-5
7-4-5-6
•••
14-15-12-13
15-12-13-14
•••
254-255-252-253
255-252-253-254
0-1-2-3
1-2-3-4
2-3-4-5
3-4-5-6
•••
6-7-8-9
7-8-9-10
•••
14-15-16-17
15-16-17-18
•••
254-255
255
Linear
0-1-2-3-4-5-6-7
1-2-3-4-5-6-7-0
2-3-4-5-6-7-0-1
3-4-5-6-7-0-1-2
•••
6-7-0-1-2-3-4-5
7-0-1-2-3-4-5-6
•••
14-15-8-9-10-11-12-13
15-8-9-10-11-12-13-14
•••
254-255-248-249-250-251-252-253
255-248-249-250-251-252-253-254
0-1-2-3-4-5-6-7
1-2-3-4-5-6-7-8
2-3-4-5-6-7-8-9
3-4-5-6-7-8-9-10
•••
6-7-8-9-10-11-12-13
7-8-9-10-11-12-13-14
•••
14-15-16-17-18-19-20-21
15-16-17-18-19-20-21-22
•••
254-255
255
BL16
Linear
0-1-2-3- ••• -12-13-14-15
1-2-3-4- ••• -13-14-15-0
2-3-4-5- ••• -14-15-0-1
3-4-5-6- ••• -15-0-1-2
•••
6-7-8-9- ••• -2-3-4-5
7-8-9-10- ••• -3-4-5-6
•••
14-15-0-1- ••• -10-11-12-13
15-0-1-2-3- ••• -11-13-13-14
•••
254-255-240-241- ••• -250-251-252-253
255-240-241-242- ••• -251-252-253-254
0-1-2-3-4- ••• -12-13-14-15
1-2-3-4- ••• -13-14-15-16
2-3-4-5- ••• -14-15-16-17
3-4-5-6- ••• -15-16-17-18
•••
6-7-8-9- ••• -18-19-20-21
7-8-9-10- ••• -19-20-21-22
•••
14-15-16-17- ••• - 26-27-28-29
15-16-17-18- ••• -27-28-29-30
•••
254-255
255
Continuous
Linear
0-1-2-3-4-5-6- •••
1-2-3-4-5-6-7- •••
2-3-4-5-6-7-8- •••
3-4-5-6-7-8-9- •••
•••
6-7-8-9-10-11-12- •••
7-8-9-10-11-12-13- •••
•••
14-15-16-17-18-19-20- •••
15-16-17-18-19-20-21- •••
•••
254-255-0-1-2-•••
255-0-1-2-•••
0-1-2-3-4-5-6- •••
1-2-3-4-5-6-7- •••
2-3-4-5-6-7-8- •••
3-4-5-6-7-8-9- •••
•••
6-7-8-9-10-11-12- •••
7-8-9-10-11-12-13- •••
•••
14-15-16-17-18-19-20- •••
15-16-17-18-19-20-21- •••
•••
254-255
255
Rev. A | July 2013
www.issi.com - [e-mail]
22