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JMicron Technology MPN encoding patterns, series identification, and handler guidance. Use when working with storage controller ICs or JMicronHandler.
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Based on SOC occupation classification
Use when refactoring, cleaning up, or enhancing the lib-electronic-components codebase. Provides guidance on architecture patterns, known issues, duplication hotspots, and recommended improvements.
Base skill for working with electronic components in this library. Use when adding new component types, manufacturer handlers, or working with MPN (Manufacturer Part Number) operations, BOM entries, or component classification.
Use this skill BEFORE creating a PR to ensure all documentation, skills, and learnings are updated. Critical for preserving institutional knowledge and preventing documentation drift.
Use when working with component similarity calculations - comparing MPNs, finding equivalent parts, implementing new similarity calculators, or understanding how component matching works.
Use when working with capacitor similarity calculations - comparing ceramic/electrolytic/film capacitor MPNs, understanding value/voltage/dielectric matching, or capacitor-specific similarity logic.
Use when working with connector similarity calculations - comparing connector MPNs, understanding pin count/pitch/family matching, or connector-specific similarity logic.
| name | jmicron |
| description | JMicron Technology MPN encoding patterns, series identification, and handler guidance. Use when working with storage controller ICs or JMicronHandler. |
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
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
| 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 |
| Series | Interface | Description |
|---|---|---|
| JMB575 | PCIe | 5-port SATA 6Gb/s controller |
| JMB585 | PCIe Gen3 | 5-port SATA 6Gb/s PCIe Gen3 controller |
| Series | Interface | Description |
|---|---|---|
| JMB363 | PCIe | SATA/PATA combo controller |
| JMB368 | PCIe | PATA controller |
| Series | Type | Description |
|---|---|---|
| JMF60x | Flash | SSD controller (early gen) |
| JMF61x | Flash | SSD controller |
| JMF66x | Flash | SSD controller (newer gen) |
| Series | Interface | Description |
|---|---|---|
| JM20330 | IDE/SATA | SATA to PATA bridge |
| JM20337 | IDE/SATA | IDE to SATA bridge |
| 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 |
| 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 |
| 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 |
// 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]*.*"
// 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
// Check hyphenated package codes first
// JMS583-QFN -> QFN
// Then check trailing letters after digits
// JMS583Q -> QFN (Q maps to QFN)
Higher generation can replace lower:
Level hierarchy:
JMS539 (Level 1) < JMS567 (Level 2) < JMS578 (Level 3) < JMS583 (Level 4)
| 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 |
manufacturers/JMicronHandler.javaComponentType.IC