AS4C32M16SB-7TIN Datasheet, PDF (15/55 Pages) Alliance Semiconductor Corporation – 54pin TSOPII PACKAGE

AS4C32M16SB-6TIN
AS4C32M16SB-7TIN
AS4C32M16SB-7TCN
• Burst Type Field (A3)
The Addressing Mode can be one of two modes, Interleave Mode or Sequential Mode. Sequential
Mode supports burst length of 1, 2, 4, 8, or full page, but Interleave Mode only supports burst length
of 4 and 8.
Table 7. Addressing Mode Select Field
A3
Burst Type
0
Sequential
1
Interleave
• Burst Definition, Addressing Sequence of Sequential and Interleave Mode
Table 8. Burst Definition
Burst Length
2
4
8
Start Address
A2 A1 A0
XX0
XX1
X00
X01
X10
X11
000
001
010
011
100
101
110
111
Full page location = 0-511
Sequential
0, 1
1, 0
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
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
n, n+1, n+2, n+3, …511, 0,
1, 2, … n-1, n, …
Interleave
0, 1
1, 0
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
0, 1, 2, 3, 4, 5, 6, 7
1, 0, 3, 2, 5, 4, 7, 6
2, 3, 0, 1, 6, 7, 4, 5
3, 2, 1, 0, 7, 6, 5, 4
4, 5, 6, 7, 0, 1, 2, 3
5, 4, 7, 6, 1, 0, 3, 2
6, 7, 4, 5, 2, 3, 0, 1
7, 6, 5, 4, 3, 2, 1, 0
Not Support
• CAS Latency Field (A6~A4)
This field specifies the number of clock cycles from the assertion of the Read command to the first
read data. The minimum whole value of CAS Latency depends on the frequency of CLK. The
minimum whole value satisfying the following formula must be programmed into this field.
tCAC(min) ≤ CAS Latency X tCK
Table 9. CAS Latency
A6
A5
0
0
0
0
0
1
0
1
1
X
A4
CAS Latency
0
Reserved
1
Reserved
0
2 clocks
1
3 clocks
X
Reserved
Confidential
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Rev.1.0 June 2016