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

| Series | Interface | Description | |--------|-----------|-------------| | JMS539 | USB 3.0 | USB 3.0 to SATA III bridge | | JMS567 | USB 3.0 | USB 3.0 to SATA III with UASP | | JMS578 | USB 3.1 Gen1 | USB 3.1 Gen1 to SATA III | | JMS583 | USB 3.1 Gen2 | USB 3.1 Gen2 to SATA III/NVMe |

JMB5xx Series - PCIe SATA Controllers

| Series | Interface | Description | |--------|-----------|-------------| | JMB575 | PCIe | 5-port SATA 6Gb/s controller | | JMB585 | PCIe Gen3 | 5-port SATA 6Gb/s PCIe Gen3 controller |

JMB3xx Series - SATA/PATA Controllers

| Series | Interface | Description | |--------|-----------|-------------| | JMB363 | PCIe | SATA/PATA combo controller | | JMB368 | PCIe | PATA controller |

JMF Series - Flash Controllers

| Series | Type | Description | |--------|------|-------------| | JMF60x | Flash | SSD controller (early gen) | | JMF61x | Flash | SSD controller | | JMF66x | Flash | SSD controller (newer gen) |

JM20xxx Series - Legacy Controllers

| Series | Interface | Description | |--------|-----------|-------------| | JM20330 | IDE/SATA | SATA to PATA bridge | | JM20337 | IDE/SATA | IDE to SATA bridge |

Package Codes

| Code | Package | Notes | |------|---------|-------| | QFN | QFN | Quad Flat No-Lead | | Q | QFN | Short form | | LQFP | LQFP | Low-profile Quad Flat Package | | L | LQFP | Short form | | BGA | BGA | Ball Grid Array | | B | BGA | Short form | | T | TQFP | Thin Quad Flat Package |

USB Generation by Series

| Series | USB Generation | Notes | |--------|----------------|-------| | JMS539 | USB 3.0 | 5Gbps | | JMS567 | USB 3.0 | 5Gbps, UASP support | | JMS578 | USB 3.1 Gen1 | 5Gbps | | JMS583 | USB 3.1 Gen2 | 10Gbps |

Feature Support Matrix

| Series | UASP | NVMe | Port Count | |--------|------|------|------------| | JMS539 | No | No | 1 | | JMS567 | Yes | No | 1 | | JMS578 | Yes | No | 1 | | JMS583 | Yes | Yes | 1 | | JMB575 | N/A | No | 5 | | JMB585 | N/A | No | 5 | | JMB363 | N/A | No | 2 | | JMB368 | N/A | No | 2 |

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

| Series | Application | |--------|-------------| | JMS539/567/578/583 | External USB hard drive enclosures | | JMB575/585 | Multi-drive SATA expansion cards | | JMB363 | Motherboard SATA+PATA combo | | JMF series | SSD/Flash drive controllers |

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