APPLICATION NOTE

OctaBus Flash Data Sequence
1. Introduction
There are two types OctaBus Flash in Macronix products. The major difference is data output
sequence in DTR-OPI mode. Due to 1 clock in/out 2 Byte data in DTR-OPI mode, always. Two
types OctaBus Flash.
• Macronix type: Data sequence follow odd address first then even address. D1/D0, D3/D2 …
• Micron compatible type: Data sequence follow even address first then odd address. D0/D1,
D2/D3…

P/N: AN1073

Proprietary
1

Rev. 1, March 25, 2024

APPLICATION NOTE

2. Feature Comparison
The address bit 0 is force to 0 even host set it to 1 in DTR-OPI mode.
Read Command
• Macronix type

• Micron compatible type

P/N: AN1073

Proprietary
2

Rev. 1, March 25, 2024

APPLICATION NOTE
Program Command
• Macronix type

• Micron compatible type

P/N: AN1073

Proprietary
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Rev. 1, March 25, 2024

APPLICATION NOTE

3. Device List
Tables 3-1 and 3-2 show the OctaBus Flash List.
Table 3-1: Octa Flash
Density
2G
1G
512M
256M

Voltage

Macronix

Micron compatible

1.8V

MX66UM2G45G

-

3V

MX66LM2G45G

-

1.8V

MX66UM1G45G

-

3V

MX66LM1G45G

-

1.8V

MX25UM51245G

MX25UM51345G

3V

MX25LM51245G

-

1.8V

MX25UM25645G

MX25UM25345G

3V

MX25LM25645G

-

Table 3-2: Concurrent-operation Octa Flash
Density

Voltage

Macronix

Micron compatible

2G

1.8V

MX66UW2G45G

MX66UW2G345G

3V

MX66LW2G45G

-

1.8V

MX66UW1G45G

MX66UW1G345G

3V

MX66LW1G45G

-

1.8V

MX25UW51245G

-

3V

MX25LW51245G

-

1.8V

MX25UW25645G

MX25UW25345G

3V

MX25LW25645G

-

128M

1.8V

MX25UW12845G

MX25UW12345G

64M

1.8V

MX25UW6445G

-

1G
512M
256M

P/N: AN1073

Proprietary
4

Rev. 1, March 25, 2024

APPLICATION NOTE

4. Revision History
Revision No.
Rev. 1

P/N: AN1073

Description
Initial Release

Proprietary
5

Page

Date

ALL

March 25, 2024

Rev. 1, March 25, 2024

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. 2024. All Rights reserved, including the trademarks and
tradename thereof, such as Macronix, MXIC, MXIC Logo, MX Logo, Integrated Solutions Provider, Nbit,
Macronix NBit, HybridFlash, HybridXFlash, XtraROM, KH Logo, BE-SONOS, KSMC, Kingtech, MXSMIO,
OctaBus, OctaFlash, ArmorFlash, LybraFlash, FortiX. 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

MACRONIX INTERNATIONAL CO., LTD. reserves the right to change product and specifications without notice.

P/N: AN1073

Proprietary
6

Rev. 1, March 25, 2024