jmicron

name: jmicron description: JMicron Technology MPN encoding patterns, series identification, and handler guidance. Use when working with storage controller ICs or JMicronHandler.

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