M58LW032C datasheet(17/61 Pages) STMICROELECTRONICS

Part #	M58LW032C

Description	32 Mbit 2Mb x16, Uniform Block, Burst 3V Supply Flash Memory

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M58LW032C

Table 3. Configuration Register

Note: 1. 4 - 2 - 2 - 2 (represents X-Y-Y-Y) is not allowed.

2. X latencies can be calculated as: (tAVQV – tLLKH + tQVKH) + tSYSTEM MARGIN < (X -1) tK. (X is an integer number from 4 to 8 and tK

is the clock period).

3. Y latencies can be calculated as: tKHQV + tSYSTEM MARGIN + tQVKH < Y tK.

4. tSYSTEM MARGIN is the time margin required for the calculation.

Address

Bit

Mnemonic

Bit Name

Reset

Value

Description

16

CR15

Read Select

1

0

Synchronous Burst Read

1

Asynchronous Bus Read (default at power-up)

15

CR14

Reserved

14

to

12

CR13-CR11

X-Latency(2)

XXX

001

Reserved

010

X-Latency = 4, 4-1-1-1 (use only with Y-Latency = 1)(1)

011

X-Latency = 5, 5-1-1-1, 5-2-2-2

100

X-Latency = 6, 6-1-1-1, 6-2-2-2

101

X-Latency = 7, 7-1-1-1, 7-2-2-2

110

X-Latency = 8, 8-1-1-1, 8-2-2-2

11

CR10

Internal

Clock Divider

X

0

X and Y-Latencies remains as set in CR13-CR11 and

CR9

1

Divides internal clock, X and Y-Latencies multiplied by 2

10

CR9

Y-Latency(3)

X

0

Y-Latency = 1

1

Y-Latency = 2

9CR8

Valid Data

Ready

X

0

R valid Low during valid Clock edge

1

R valid Low one cycle before valid Clock edge

8

CR7

Burst Type

X

0

Interleaved

1

Sequential

7CR6

Valid Clock

Edge

X

0

Falling Clock edge

1

Rising Clock edge

6 to 4

CR5-CR3

Reserved

3

to

1

CR2-CR0

Burst Length

XXX

001

4 Words

010

8 Words

111

Continuous

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