emc643sp16ak Emlsi Inc., emc643sp16ak Datasheet - Page 24

• Manufacturer Part Number: emc643sp16ak
• Description: 4mx16 Bit Cellularram Ad-mux
• Manufacturer: Emlsi Inc.

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 4, 8, 16, or 32 words. The device can also be set in continuous burst mode where data is output sequentially without regard to
address boundaries; the internal address wraps to 000000h if the device is read past the last address.
Burst Wrap (BCR[3]) Default = No Wrap
The burst-wrap option determines if a 4, 8, 16, or 32 word READ or WRITE burst wraps within the burst length, or steps through
sequential addresses. If the wrap option is not enabled, the device accesses data from sequential addresses without regard to address
boundaries; the internal address wrap to 000000h if the device is read past the last address.
Table 3: Sequence and Burst Length
BCR[3]
BURST Wrap
0
1
Wrap
Yes
No
Address
Starting
Decimal
14
15
30
31
14
15
30
31
...
...
...
...
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
4 Word
Length
Linear
Burst
0-1-2-3
1-2-3-0
2-3-0-1
3-0-1-2
0-1-2-3
1-2-3-4
2-3-4-5
3-4-5-6
7-8-9-10-11-12-13-14
6-7-8-9-10-11-12-13
Burst Length
5-6-7-8-9-10-11-12
4-5-6-7-8-9-10-11
3-4-5-6-7-8-9-10
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
4-5-6-7-0-1-2-3
5-6-7-0-1-2-3-4
6-7-0-1-2-3-4-5
7-0-1-2-3-4-5-6
0-1-2-3-4-5-6-7
1-2-3-4-5-6-7-8
2-3-4-5-6-7-8-9
8 Word
Linear
7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22
6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21
5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20
4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19
3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18
2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17
14-15-16-17-18-...-23-24-25-26-27-28-29
15-16-17-18-19-...-24-25-26-27-28-29-30
1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16
0-1-2-3-4-5-6-7-8-9-10-11-12-13-14-15
1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-0
2-3-4-5-6-7-8-9-10-11-12-13-14-15-0-1
3-4-5-6-7-8-9-10-11-12-13-14-15-0-1-2
4-5-6-7-8-9-10-11-12-13-14-15-0-1-2-3
5-6-7-8-9-10-11-12-13-14-15-0-1-2-3-4
6-7-8-9-10-11-12-13-14-15-0-1-2-3-4-5
7-8-9-10-11-12-13-14-15-0-1-2-3-4-5-6
14-15-0-1-2-3-4-5-6-7-8-9-10-11-12-13
15-0-1-2-3-4-5-6-7-8-9-10-11-12-13-14
0-1-2-3-4-5-6-7-8-9-10-11-12-13-14-15
24
Burst Length
16 Word
Linear
...
...
4Mx16 CellularRAM AD-MUX
14-15-16-...-11-12-13
15-16-17-...-44-45-46
30-31-32-...-59-60-61
31-32-33-...-60-61-62
15-16-17...-12-13-14
14-15-16-...43-44-45
30-31-0-...-27-28-29
31-0-1-... -28-29-30
Burst Length
0-1-2-...-29-30-31
1-2-3-...-30-31-32
2-3-4-...-31-32-33
3-4-5-...-32-33-34
4-5-6-...-33-34-35
5-6-7-...-34-35-36
6-7-8-...-35-36-37
7-8-9-...-36-37-38
0-1-2 ... 29-30-31
1-2-3 ... 30-31-0
2-3-4 ... 31-0-1
3-4-5 ... 0-1-2
4-5-6 ... 1-2-3
5-6-7 ... 2-3-4
6-7-8 ... 3-4-5
7-8-9 ... 4-5-6
32 Word
Linear
EMC643SP16AK
...
...
...
...
14-15-16-17-18-19-20-...
15-16-17-18-19-20-21-...
14-15-16-17-18-19-20-...
15-16-17-18-19-20-21-...
30-31-32-33-34-35-36-...
31-32-33-34-35-36-37-...
7-8-9-10-11-12-13-...
7-8-9-10-11-12-13-...
6-7-8-9-10-11-12-...
6-7-8-9-10-11-12-...
30-31-32-33-34-...
31-32-33-34-35-...
5-6-7-8-9-10-11-...
5-6-7-8-9-10-11-...
4-5-6-7-8-9-10-...
Continuous
4-5-6-7-8-9-10-...
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-...
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-...
Linear
Burst
...
...
...
...