S29CD-G datasheet(34/87 Pages) SPANSION

Part #	S29CD-G

Description	32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O

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Manufacturer	SPANSION [SPANSION]

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32

S29CD-G Flash Family

S29CD-G_00_B0 November 14, 2005

Prel imi n ary

Table 33. Configuration Register Definitions

CR15

CR14

CR13

CR12

CR11

CR10

CR9

CR8

RM

ASD

IAD3

IAD2

IAD1

IAD0

DOC

WC

CR7

CR6

CR5

CR4

CR3

CR2

CR1

CR0

BS

CC

Reserved

BL2

BL1

BL0

Configuration Register

CR15 = Read Mode (RM)

0 = Synchronous Burst Reads Enabled

1 = Asynchronous Reads Enabled (Default)

CR14 = Reserved for Future Enhancements

0 = ASM enable

1 = ASM disable

CR13–CR10 = Automatic Sleep Mode Disable

Speed Options 40, 56, and 66 MHz:

0000 = 2 CLK cycle initial burst access delay

0001 = 3 CLK cycle initial burst access delay

0010 = 4 CLK cycle initial burst access delay

0011 = 5 CLK cycle initial burst access delay

0100 = 6 CLK cycle initial burst access delay

0101 = 7 CLK cycle initial burst access delay

0110 = 8 CLK cycle initial burst access delay

0111 = 9 CLK cycle initial burst access delay—Default

CR9 = Data Output Configuration (DOC)

0 = Hold Data for 1-CLK cycle—Default

1 = Reserved

CR8 = IND/WAIT# Configuration (WC)

0 = IND/WAIT# Asserted During Delay—Default

1 = IND/WAIT# Asserted One Data Cycle Before Delay

CR7 = Burst Sequence (BS)

0 = Reserved

1 = Linear Burst Order—Default

CR6 = Clock Configuration (CC)

0 = Reserved

1 = Burst Starts and Data Output on Rising Clock Edge—Default

CR5–CR3 = Reserved For Future Enhancements (R)

These bits are reserved for future use. Set these bits to 0.

CR2–CR0 = Burst Length (BL2–BL0)

000 = Reserved, burst accesses disabled (asynchronous reads only)

001 = 64 bit (8-byte) Burst Data Transfer - x32 Linear

010 = 128 bit (16-byte) Burst Data Transfer - x32 Linear

011 = 256 bit (32-byte) Burst Data Transfer - x32 Linear (device default)

100 = Reserved, burst accesses disabled (asynchronous reads only)

101 = Reserved, burst accesses disabled (asynchronous reads only)

110 = Reserved, burst accesses disabled (asynchronous reads only)

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