Jmicron

JMicron Technology Manufacturer Skill

MPN Structure

JMicron MPNs follow these general structures:

JMS[SERIES][VARIANT][PACKAGE]    (USB-SATA bridges)
JMB[SERIES][VARIANT][PACKAGE]    (PCIe/SATA controllers)
JMF[SERIES][VARIANT][PACKAGE]    (Flash controllers)
JM20[SERIES][VARIANT][PACKAGE]   (Legacy IDE/SATA)
 |     |       |        |
 |     |       |        └── Package code (QFN, LQFP, BGA, etc.)
 |     |       └── Variant letter (optional)
 |     └── 3-digit series number
 └── JMS/JMB/JMF/JM20 prefix

Example Decoding

JMS583-QFN
│  │  │
│  │  └── QFN package
│  └── 583 = USB 3.1 Gen2 to SATA/NVMe bridge
└── JMS = JMicron USB-SATA prefix

JMB585-LQFP
│  │  │
│  │  └── LQFP package
│  └── 585 = 5-port PCIe Gen3 SATA controller
└── JMB = JMicron board controller prefix

Product Series

JMS5xx Series - USB to SATA Bridges

JMB5xx Series - PCIe SATA Controllers

JMB3xx Series - SATA/PATA Controllers

JMF Series - Flash Controllers

JM20xxx Series - Legacy Controllers

Package Codes

USB Generation by Series

Feature Support Matrix

Handler Implementation Notes

Pattern Matching

// JMS5xx series - USB to SATA bridge controllers
"^JMS5[0-9]{2}[A-Z]*.*"

// JMB5xx series - PCIe SATA/NVMe controllers
"^JMB5[0-9]{2}[A-Z]*.*"

// JMB3xx series - SATA port multiplier/host controllers
"^JMB3[0-9]{2}[A-Z]*.*"

// JMF series - Flash memory controllers
"^JMF[0-9]+[A-Z]*.*"

// JMB4xx series - USB bridge controllers (legacy)
"^JMB4[0-9]{2}[A-Z]*.*"

// JM20xxx series - IDE/SATA controllers (legacy)
"^JM20[0-9]{3}[A-Z]*.*"

Series Extraction

// JMS/JMB series: prefix + 3 digits = 6 characters
// JMS583 -> JMS583
// JMB585 -> JMB585

if (upperMpn.matches("^JMS5[0-9]{2}.*")) {
    return upperMpn.substring(0, 6);
}

// JMF series: variable length digits
// JMF612 -> JMF612
// JMF667 -> JMF667

// JM20xxx series: 7 characters
// JM20330 -> JM20330

Package Code Extraction

// Check hyphenated package codes first
// JMS583-QFN -> QFN

// Then check trailing letters after digits
// JMS583Q -> QFN (Q maps to QFN)

Replacement Compatibility

USB-SATA Bridge Upgrade Path

Higher generation can replace lower:

• JMS567 can replace JMS539 (adds UASP)
• JMS578 can replace JMS567 (USB 3.1 Gen1)
• JMS583 can replace JMS578 (USB 3.1 Gen2, adds NVMe)

Level hierarchy:

JMS539 (Level 1) < JMS567 (Level 2) < JMS578 (Level 3) < JMS583 (Level 4)

PCIe SATA Controllers

• JMB585 can replace JMB575 (newer, PCIe Gen3)

Non-Interchangeable

• JMS5xx (USB bridges) NOT compatible with JMB5xx (PCIe controllers)
• Different interface types cannot be swapped

Common Applications

Related Files

• Handler: manufacturers/JMicronHandler.java
• Component types: ComponentType.IC

Learnings & Edge Cases

• JMS583 is unique for NVMe support: Only USB-SATA bridge that supports NVMe
• UASP support important for performance: JMS567+ support UASP for better performance
• Prefix indicates interface type: JMS = USB, JMB = PCIe board controller, JMF = Flash
• 5-port controllers: JMB575/585 are specifically 5-port SATA controllers
• Legacy JM20xxx series: Still found in older devices, uses 7-character part numbers
• Variable digit length in JMF: JMF series uses variable-length numeric suffixes