MT28F1284W18BQ-705BET Ver la hoja de datos (PDF) - Micron Technology

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MT28F1284W18BQ-705BET

8 MEG x 16 ASYNC/PAGE/BURST FLASH MEMORY

Micron Technology 

8 MEG x 16

ASYNC/PAGE/BURST FLASH MEMORY

Read Configuration Register (RCR)

The SET READ CONFIGURATION REGISTER com-

mand is a sequence used to load the read configura-

tion register (RCR). It is a two-cycle command

sequence. Read configuration setup (60h) is written,

followed by a second WRITE (03h) that specifies the

value to be written to the read configuration register.

The new RCR settings are placed on the address bus

(A0–A15), and are latched on the rising edge of CE# or

WE#, whichever occurs first. Refer to Table 9 for the

RCR bit settings. After setting the RCR, the device auto-

matically returns to read array mode. Upon reset, the

RCR is set to FFCFh.

Table 9: Read Configuration Register

BIT #

15

DESCRIPTION

Read Mode

14 Reserved

13–11 Latency Code

10 Wait Signal Polarity

9

Hold Data Out

8

Wait Configuration

7

Burst Sequence

6

Clock Configuration

5–4 Reserved

3

Burst Wrap

2–0 Burst Length

FUNCTION

0 = Synchronous Burst Access Mode

1 = Asynchronous/Page Access Mode (default)

Default = 1

Sets the number of clock cycles before valid data out (see Figure 6):

000 = Code 0 - reserved

001 = Code 1 - reserved

010 = Code 2

011 = Code 3

100 = Code 4

101 = Code 5

110 = Code 6 - reserved

111 = Code 7 - reserved (default)

0 = WAIT# signal is active LOW

1 = WAIT# signal is active HIGH (default)

Sets the data output configuration:

0 = Hold data for one clock

1 = Hold data for two clocks (default)

Controls the behavior of the WAIT# output signal:

0 = WAIT# asserted during delay

1 = WAIT# asserted one data cycle before delay (default)

Specifies the order in which data is addressed in synchronous burst mode:

0 = Reserved

1 = Linear (default)

Defines the clock edge on which the BURST operation starts and data is

referenced:

0 = Falling edge

1 = Rising edge (default)

Default = 0

0 = Burst wraps within the burst length

1 = Burst no wrap (default)

Sets the number of words the device will output in burst mode:

001 = 4 words

010 = 8 words

011 = 16 words

111 = Continuous burst (default)

09005aef80b425b4

MT28F1284W18_D.fm - Rev. D, 11/03 EN

17

Micron Technology, Inc., reserves the right to change products or specifications without notice.

©2003 Micron Technology. Inc.

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