Comparing Atmel AT26DF with Macronix MX25L-06E

APPLICATION NOTE
Comparing Atmel AT26DF with Macronix MX25L_06E
1. Introduction
Macronix offers MX25L_06E dual I/O mode serial flash in densities from 8Mb to 32Mb. The MX25L_06E
and Atmel AT26DF devices have similar features, performance, and command codes, but there are
differences. This application note explains how to accommodate those differences when comparing
Atmel AT26DF devices with equivalent Macronix MX25L_06E series flash products.
The information in this document is based on datasheets listed in Section 8. Newer versions of the
datasheets may override the contents of this document.
2. Feature Comparison
Both flash device families have similar features and functions as shown in Table 2-1. Significant
differences are highlighted in blue and may require special considerations.
Table 2-1: Features
Feature
Vcc voltage range
I/O mode*2
Sector Size
Program Buffer Size
Security OTP
Hold# Pin
Individual Block Protection
Manufacturer ID
8Mb
Device ID
Macronix MX25L_06E
2.7V ~ 3.6V
1-1-1/1-1-2
4KB/64KB
256 Byte
512b
Yes
-C2h
20h/14h
16Mb
20h/15h
32Mb
20h/16h
Atmel AT26DF*1
2.7V ~ 3.6V
1-1-1
4KB/32KB/64KB
256 Byte
-Yes*3
Yes*4
1Fh
45h/01h
46h/00h – AT26DF161
46h/01h – AT26DF161A
47h/00h
Note:
1. Atmel AT26DF series is divided into two families. One is AT26DF_A and the other is AT26DF_ (without “A”).
2. x-y-z in I/O mode indicates the number of active pins used for opcode(x), address(y) and data(z).
3. AT26DF161 and AT26DF321 don’t support HOLD# Pin.
4. Every physical sector of the Atmel device has a corresponding single-bit Sector Protection Register.
P/N: AN0238
1
Ver 1. June 1, 2013
APPLICATION NOTE
3. Performance Comparison
Tables 3-1 and 3-2 show MX25L_06E series and AT26DF series AC performance which should
be used as a reference for the design.
Table 3-1: Read Performance
Parameter
Macronix MX25L_06E
Normal Read (Max.)
Fast Read (Max.)
15pf
tCLQV / tV
(Max.)
30pf
33MHz
86MHz
6ns
8ns
Atmel AT26DF
AT26DF_A
AT26DF_
33MHz
70MHz
66MHz
6ns*1*2
Note:
1. AT26DF081A/AT26DF161A tV condition is 15pF load at 70MHz, and 30pF load at 66MHz.
2. AT26DF161/AT26DF321 tV condition is 30pF.
Table 3-2: Write Performance
Parameter
4KB (typ.)
Erase
32KB (typ.)
64KB (typ.)
8Mb (typ.)
Chip Erase
16Mb (typ.)
32Mb (typ.)
Byte
Program
Page
Write/Erase Endurance
P/N: AN0238
Macronix MX25L_06E
60ms
-0.7s
7s
14s
25s
9us
1.4ms
100,000
2
Atmel AT26DF
AT26DF_A
50ms
250ms
0.4s
6s
12s
-7us
1.2ms
AT26DF161
50ms
350ms
0.7s
-18s
--1.5ms
100,000
AT26DF321
50ms
350ms
0.6s
--36s
6us
1.5ms
Ver 1. June 1, 2013
APPLICATION NOTE
4. DC Characteristics Comparison
DC characteristics are similar for both device families.
Table 4-1: Read / Write Current
Parameter
Macronix MX25L_06E
Atmel AT26DF
8Mb
12mA (Max.) @ 86MHz
16Mb
25mA (Max.) @ 86MHz
32Mb
8Mb
Standby Current
16Mb
32Mb
Program Current
25mA (Max.) @ 86MHz
25uA (Max.)
25uA (Max.)
40uA (Max.)
20mA (Max.)
16mA (Max.) @ 70MHz
15mA (Max.) @ 66MHz*1
16mA (Max.) @ 70MHz*2
15mA (Max.) @ 66MHz
35uA (Max.)
35uA (Max.)
35uA (Max.)
18mA (Max.)
Read Current @
1xI/O
Note:
1. Read Current of AT26DF161.
2. Read Current of AT26DF161A.
Table 4.2 shows both families have similar Input/Output voltage ranges.
Table 4-2: Input / Output Voltage
Parameter
Macronix MX25L_06E
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
P/N: AN0238
-0.5V (Min.) / 0.3VCC (Max.)
0.7VCC (Min.) / VCC+0.4V (Max.)
0.4V (Max.)
VCC-0.2 (Min.)
3
Atmel AT26DF
0.3Vcc(Max.)
0.7Vcc (Min.)
0.4V (Max.)
Vcc-0.2 (Min.)
Ver 1. June 1, 2013
APPLICATION NOTE
5. Hardware Considerations
Both devices are available in 8-SOP, 16-SOP, and 8-WSON packages with identical
footprints. The figures below show the common packages and the pinout assignments
for the Macronix and Atmel devices. A pull-up resistor needs to be added to the Macronix
HOLD# pin when comparing an Atmel device that does not support the HOLD# function.
Table 5-1: Packages
Macronix
8Mb
16Mb
32Mb
8Mb
MX25L8006E MX25L1606E MX25L3206E AT26DF081A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
-
Package
8-SOP (150mil)
8-SOP (200mil)
16-SOP (300mil)
8-WSON (6x5mm)
Atmel
16Mb
AT26DF161 AT26DF161A
Yes
Yes
Yes
Yes
32Mb
AT26DF321
Yes
Yes
-
8-SOP (150mil & 200mil)
CS#
SO/SIO1
1
2
WP#
3
GND
4
MX25L_06E
8
VCC
7
6
HOLD#
CS#
SCLK
WP#
3
5
SI/SIO0
GND
4
1
2
SO
AT26DF_A
8
VCC
7
6
HOLD#
5
CS#
SO
1
2
SCK
WP#
3
SI
GND
4
AT26DF_
8
VCC
7
6
NC
5
SI
16-SOP (300mil):
NC
1
16
SCK
VCC
2
15
SI
NC
NC
3
14
NC
13
NC
NC
4
13
NC
12
NC
NC
5
12
NC
6
11
NC
NC
6
11
NC
CS#
7
10
GND
CS#
7
10
GND
SO/SIO1
8
9
WP#
SO
8
9
WP#
HOLD#/SIO3
16
SCLK
3
15
14
SI/SIO0
NC
4
NC
5
NC
VCC
1
2
NC
MX25L3206E
AT26DF321
8-WSON (6x5mm):
1
8
VCC
SO/SIO1
2
7
HOLD#
WP#
3
6
GND
4
5
CS#
P/N: AN0238
MX251606E
CS#
1
SO
2
SCLK
WP# p
3
SI/SIO0
GND
4
4
AT26DF161A
8
VCC
7
HOLD#
6
SCK
5
SI
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SCLK
APPLICATION NOTE
6. Software Considerations
6-1. Command Definition
Basic command sets of both flash families are similar. Status Register and Configuration
Register definitions may be slightly different, but the concepts are the same. Minor modifications
to the algorithm may be necessary depending on your application. See the Macronix datasheet
for a complete list of commands, as additional features are provided and not shown.
Table 6-1: Command Comparison
Instruction
Instruction
Type
Read ID
Read
Write
Register
Other Command
RDID
READ
FAST_READ
DREAD
WREN
WRDI
PP
SP
SE (4KB)
BE (32KB)
BE (64KB)
CE
RDSR
WRSR
RDSCUR
WRSCUR
PS
US
RSPR
DP
RES
Description
Read Identification
Read Data Bytes
Read Data Bytes at Higher Speed
Dual Output Mode Read
Write Enable
Write Disable
Byte/Page Program
Sequential program
Sector Erase (4KB)
Block Erase (32KB)
Block Erase (64KB)
Chip Erase
Read Status Register
Write Status Register
Read Security Register
Write Security Register
Protect Sector
Unprotect Sector
Read Sector Protection Registers
Deep Power Down
Release from Deep Power Down
Macronix
MX25L_06E
Atmel
AT26DF
9Fh
9Fh
03h
03h
0Bh
0Bh
-3Bh
06h
06h
04h
04h
02h
02h
-ADh or AFh*1
20h
20h
-52h
52h or D8h
D8h
60h or C7h
60h or C7h
05h
05h
01h
01h
2Bh
-2Fh
--36h
-39h
-3Ch
B9h
B9h
ABh
ABh
Note:
1. AT26DF161 and AT26DF321 don’t support sequential program.
P/N: AN0238
5
Ver 1. June 1, 2013
APPLICATION NOTE
6-2. Status Register, and Security Register
Both devices use registers to setup flash conditions, but there are some differences that designers need
to be aware of as modifications to software may be needed. A detailed register comparison is shown in
Table 6-2 and Table 6-3. If a detailed functional description of register bits is required please refer to the
datasheets listed in Section 8. Status Register bits 0 (RDY/BSY), 1 (WEL), and 7 (SPRL) have the same
function in the Atmel and Macronix devices. However, Status Register bits 2 through 6 are different,
primarily due to differences in Write Protection methods.
Table 6-2: Status Register
Register Bit
Macronix MX25L_06E
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Atmel AT26DF
WIP; 1=write operation
WEL; 1=write enable
BP0; BP protection
BP1; BP protection
BP2; BP protection
BP3; BP protection*1
0
SRWD; 1=SR write disable
RDY/BSY; 1=busy
WEL; 1=write enable
SWP; Software Protection Status
SWP; Software Protection Status
WPP; 1=WP# deasserted
EPE; 1=Erase/Program error
SPM; Sequential Program Mode status*2
SPRL; Sector Protection Register Locked
Note:
1. Bit5 of MX25L8006E is reserved, and value is 0.
2. Bit6 of AT26DF161 and AT26DF321 is reserved.
Table 6-3: Security Register
Register Bit
Macronix MX25L_06E
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
P/N: AN0238
Atmel AT26DF
Secured OTP indicator bit; 1=factory
lock
LDSO; 1=OTP lock down
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
6
-
-
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APPLICATION NOTE
6-3. Manufacturer ID and Device ID
Manufacturer IDs are different. This permits software to identify the device manufacturer. The
Device IDs are different from 8Mb to 32Mb densities. The same command is used to read the
different IDs.
Table 6-4: Manufacturer and Device ID
Command Type
RDID 9Fh
Macronix MX25L_06E
8Mb
16Mb
32Mb
C2h/20h/14h
C2h/20h/15h
C2h/20h/16h
Atmel AT26DF
AT26DF_A
1Fh/45h/01h
1Fh/46h/01h
--
AT26DF_
-1Fh/46h/00h
1Fh/47h/00h
7. Summary
The Macronix MX25L_06E and Atmel AT26DF have similar commands, functions, and features.
Additionally, the supported package types have identical footprints and nearly identical pinout
definitions. A pull-up resistor needs to be added to the Macronix HOLD# pin when comparing an
Atmel device that does not support the HOLD# function. A more detailed analysis should be
done if any of the “special” functions not supported by the Macronix flash are used, such as the
Atmel 32KB erase size, Individual Block Write Protection or Sequential Programming. If
common features are used in standard traditional modes, they may need only minimal software
modification.
8. References
Table 8-1 shows the datasheet versions used for comparison in this application note. For the most
current, detailed specification, please refer to the Macronix Website at http://www.macronix.com
Table 8-1: Datasheet Version
Datasheet
MX25L8006E
MX25L1606E
MX25L3206E
AT26DF081A
AT26DF161
AT26DF161A
AT26DF321
P/N: AN0238
Location
Data Issued
Version
Website
Website
Website
Website
Website
Website
Website
FEB. 10, 2012
FEB. 23, 2012
FEB. 23, 2012
JUN, 2009
AUG, 2009
AUG, 2009
MAY, 2008
Rev. 1.2
Rev. 1.4
Rev. 1.4
Rev. G
Rev. H
Rev. D
Rev. F
7
Ver 1. June 1, 2013
APPLICATION NOTE
9. Appendix
Table 9-1 shows the basic part number and package information cross reference
between Macronix MX25L_06E and Atmel AT26DF parts.
Table 9-1: Part Number Cross Reference
Density
8Mb
Macronix Part No.
MX25L8006EM1I-12G
MX25L8006EM2I-12G
MX25L1606EM1I-12G
16Mb
MX25L1606EM2I-12G
MX25L1606EZNI-12G
MX25L3206EMI-12G
MX25L3206EM2I-12G
32Mb
Atmel Part No.
AT26DF081A-SSU
AT26DF081A-SU
AT26DF161A-SSU
AT26DF161-SU
AT26DF161A-SU
AT26DF161A-MU
AT26DF321-S3U
AT26DF321-SU
Package
8-SOP
8-SOP
8-SOP
Dimension
150 mil
208 mil
150 mil
8-SOP
208 mil
8-WSON
16-SOP
8-SOP
6x5mm
300 mil
208 mil
10. Revision
Table 10-1: Revision History
Revision
Rev. 1.0
P/N: AN0238
Description
Date Issued
Initial Release
Jun. 21, 2013
8
Ver 1. June 1, 2013
APPLICATION NOTE
Except for customized products which have been expressly identified in the applicable agreement,
Macronix's products are designed, developed, and/or manufactured for ordinary business, industrial,
personal, and/or household applications only, and not for use in any applications which may, directly or
indirectly, cause death, personal injury, or severe property damages. In the event Macronix products are
used in contradicted to their target usage above, the buyer shall take any and all actions to ensure said
Macronix's product qualified for its actual use in accordance with the applicable laws and regulations;
and Macronix as well as it’s suppliers and/or distributors shall be released from any and all liability arisen
therefrom.
Copyright© Macronix International Co., Ltd. 2013. All rights reserved, including the trademarks and
tradename thereof, such as Macronix, MXIC, MXIC Logo, MX Logo, Integrated Solutions Provider, NBit,
Nbit, NBiit, Macronix NBit, eLiteFlash, HybridNVM, HybridFlash, XtraROM, Phines, KH Logo,
BE-SONOS, KSMC, Kingtech, MXSMIO, Macronix vEE, Macronix MAP, Rich Au-dio, Rich Book, Rich TV,
and FitCAM. The names and brands of third party referred thereto (if any) are for identification purposes
only
For the contact and order information, please visit Macronix’s Web site at: http://www.macronix.com
P/N: AN0238
9
Ver 1. June 1, 2013
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