Rainbow Electronics W982516CH User Manual

Page 13

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W982516CH

Publication Release Date: Mar 2003

- 13 -

Revision A1

Addressing Sequence of Sequential Mode

A column access is performed by increasing the address from the column address which is input to
the device. The disturb address is varied by the Burst Length as shown in Table 2.

Table 2 Address Sequence of Sequential Mode

DATA

ACCESS ADDRESS

BURST LENGTH

Data 0

n

BL = 2 (disturb address is A0)

Data 1

n + 1

No address carry from A0 to A1

Data 2

n + 2

BL = 4 (disturb addresses are A0 and A1)

Data 3

n + 3

No address carry from A1 to A2

Data 4

n + 4

Data 5

n + 5

BL = 8 (disturb addresses are A0, A1 and A2)

Data 6

n + 6

No address carry from A2 to A3

Data 7

n + 7

Addressing Sequence of Interleave Mode

A column access is started in the input column address and is performed by inverting the address bit
in the sequence shown in Table 3.

Table 3 Address Sequence of Interleave Mode

DATA

ACCESS ADDRESS

BUST LENGTH

Data 0

A8 A7 A6 A5 A4 A3 A2 A1 A0

BL = 2

Data 1

A8 A7 A6 A5 A4 A3 A2 A1

A0

Data 2

A8 A7 A6 A5 A4 A3 A2

A1

A0

BL = 4

Data 3

A8 A7 A6 A5 A4 A3 A2

A1 A0

Data 4

A8 A7 A6 A5 A4 A3

A2 A1 A0

BL = 8

Data 5

A8 A7 A6 A5 A4 A3 A2 A1 A0

Data 6

A8 A7 A6 A5 A4 A3

A2

A1

A0

Data 7

A8 A7 A6 A5 A4 A3

A2

A1

A0

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