M58LW128A 데이터 시트보기 (PDF) - STMicroelectronics

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M58LW128A

128 Mbit (8Mb x16 or 4Mb x32, Uniform Block, Burst) 3V Supply Flash Memories

STMicroelectronics 

M58LW128A, M58LW128B

Table 5. Burst Configuration Register

Address

Bit

Mnemonic

Bit Name

Reset

Value

Value

Description

17

M15

Read

Select

0 Synchronous Burst Read

1

1 Asynchronous Bus Read

0010

X-Latency = 7, use only with Continuous Burst

Length

0011 X-Latency = 8

0100 X-Latency = 9

0101

X-Latency = 10, use only with Continuous Burst

Length

16

to

M14-M11

X-Latency

XXXX

0110

X-Latency = 11, use only with Continuous Burst

Length

13

1001 X-Latency = 12

1010 X-Latency = 13

1011

X-Latency = 13, use only with Continuous Burst

Length

1101 X-Latency = 15

Others Reserved, Do Not Use.

0

When X-Latency < 13, Y-Latency = 1

When M14-M11 = 1011 or 1101, Y-Latency = 2

11

M9

Y-Latency

X

When X-Latency ≤15 but M14-M11≠1011 or

1 1101, Y-Latency = 2,

When M14-M11=1011 or 1101 DO NOT USE.

10

M8

Valid Data

Ready

X

0 R valid Low during valid Clock edge

1 R valid Low one cycle before valid Clock edge

0 Interleaved

9

M7

Burst Type

X

1 Sequential

8

M6

Valid Clock

Edge

X

0 Falling Clock edge

1 Rising Clock edge

5

M3

Latch

Enable

0 Random Read

0

1 Latch Enable Controlled Read

100 1 Word or Double-Word

101 2 Words or Double-Words

4

to

M2-M0 Burst

001 4 Words or Double-Words

XXX

2

Length

010 8 Words

111 Continuous

Others Reserved, Do Not Use.

Valid Bus

Width

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 only

x16 only

x16 only

x16 only

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 or x32

x16 only

x16 or x32

21/65

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