Agent skill

esmt

ESMT (Elite Semiconductor Memory Technology) MPN encoding patterns, suffix decoding, and handler guidance. Use when working with ESMT DRAM and Flash memory components or ESMTHandler.

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npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/esmt

SKILL.md

ESMT (Elite Semiconductor Memory Technology) Manufacturer Skill

MPN Structure

ESMT MPNs follow this general structure:

[PREFIX][DENSITY][CONFIG][VERSION]-[SPEED][PACKAGE]
   |       |        |       |        |        |
   |       |        |       |        |        +-- Package code (TG, BG, etc.)
   |       |        |       |        +-- Speed grade (6, 5, 2.5, 100, 70)
   |       |        |       +-- Version letter (A, B, etc.)
   |       |        +-- Memory configuration (bus width, banks)
   |       +-- Density in Mbit
   +-- Series prefix (M12L, M14D, F25L, F49L)

Example Decoding

M12L128168A-6TG
|  |   |  ||  ||
|  |   |  ||  |+-- TG = TSOP-II package
|  |   |  ||  +-- 6 = 6ns speed grade
|  |   |  |+-- A = version/revision
|  |   |  +-- 8 = 8 banks
|  |   +-- 16 = 16-bit data bus
|  +-- 128 = 128 Mbit density
+-- M12L = SDRAM series

F25L016A-100PAIG
|  |  ||    | ||
|  |  ||    | |+-- IG = Industrial grade
|  |  ||    | +-- PA = SOP package
|  |  ||    +-- 100 = 100MHz speed
|  |  |+-- A = version
|  |  +-- 016 = 16 Mbit
|  +-- 25L = SPI Flash series
+-- F = Flash prefix

Series Prefixes

Prefix Memory Type Description
M12L SDRAM Synchronous DRAM
M14D DDR SDRAM DDR1 SDRAM
F25L SPI Flash Serial SPI NOR Flash
F49L Parallel Flash Parallel NOR Flash

Density Codes

SDRAM (M12L) and DDR (M14D)

Code Density Notes
16 16 Mbit
32 32 Mbit
64 64 Mbit
128 128 Mbit
256 256 Mbit DDR only
512 512 Mbit DDR only

SPI Flash (F25L)

Code Density Notes
004 4 Mbit Leading zeros
008 8 Mbit Leading zeros
016 16 Mbit Leading zeros
032 32 Mbit Leading zeros
064 64 Mbit Leading zeros
128 128 Mbit

Parallel Flash (F49L)

Code Density Notes
160 16 Mbit Scaled encoding (160 = 16Mb)
320 32 Mbit Scaled encoding
640 64 Mbit Scaled encoding

Package Codes

Code Package Description
A TSOP Thin Small Outline Package
B BGA Ball Grid Array
TG TSOP-II TSOP Type II
WG WBGA Window BGA
BG BGA Ball Grid Array
PA SOP Small Outline Package
PAIG SOP SOP with Industrial Grade
PG SOP-8 8-pin SOP

Speed Grades

SDRAM/DDR

Code Speed Access Time
5 200MHz 5ns
6 166MHz 6ns
7 143MHz 7ns
2.5 400MHz 2.5ns (DDR)

Flash

Code Speed Notes
70 70ns Parallel Flash
100 100MHz SPI Flash
104 104MHz High-speed SPI

Product Families

M12L Series - SDRAM

Part Number Density Configuration Speed
M12L128168A-6TG 128 Mbit 8M x 16 x 8 banks 166MHz
M12L64164A-5TG 64 Mbit 4M x 16 x 4 banks 200MHz
M12L32164A-6TG 32 Mbit 2M x 16 x 4 banks 166MHz

M14D Series - DDR SDRAM

Part Number Density Configuration Speed
M14D5121632A-2.5BG 512 Mbit 32M x 16 x 2 400MHz
M14D2561616A-2.5BG 256 Mbit 16M x 16 x 1 400MHz
M14D1281616A-2.5BG 128 Mbit 8M x 16 x 1 400MHz

F25L Series - SPI Flash

Part Number Density Interface Speed
F25L004A-100PAIG 4 Mbit SPI 100MHz
F25L008A-100PAIG 8 Mbit SPI 100MHz
F25L016A-100PAIG 16 Mbit SPI 100MHz

F49L Series - Parallel Flash

Part Number Density Interface Speed
F49L160UA-70TG 16 Mbit Parallel 70ns
F49L320UA-70TG 32 Mbit Parallel 70ns

Configuration Encoding (SDRAM/DDR)

The configuration digits after the density encode:

M12L128168A
       |||
       ||+-- Banks (4 or 8)
       |+-- Data bus width (16-bit = 16)
       +-- First digit varies
Config Code Meaning
168 16-bit bus, 8 banks
164 16-bit bus, 4 banks
1616 16-bit bus, 16Mbit config

Handler Implementation Notes

Pattern Matching

java
// SDRAM - M12L series
"^M12L\\d+.*"

// DDR SDRAM - M14D series
"^M14D\\d+.*"

// SPI Flash - F25L series (also MEMORY_FLASH type)
"^F25L\\d+.*"

// Parallel Flash - F49L series (also MEMORY_FLASH type)
"^F49L\\d+.*"

Package Code Extraction

java
// Handle hyphenated MPNs - get part after last hyphen
int lastHyphen = upperMpn.lastIndexOf('-');
if (lastHyphen > 0) {
    String suffix = upperMpn.substring(lastHyphen + 1);
    // Strip leading speed grade digits/dots
    String pkgCode = suffix.replaceAll("^[0-9.]+", "");
    // Check PACKAGE_CODES map
}

Density Extraction Complexities

java
// SPI Flash uses leading zeros: 004, 008, 016
// Parallel Flash uses scaled encoding: 160=16Mbit

// F25L004A -> "4" (strip leading zeros)
// F49L160UA -> "16" (scale down by 10)

Cross-References

SDRAM Equivalents

ESMT Samsung Micron ISSI
M12L128168A K4S641632N MT48LC8M16 IS42S16800
M12L64164A K4S281632I MT48LC4M16 IS42S16400

SPI Flash Equivalents

ESMT Winbond Macronix SST
F25L016A W25Q16 MX25L1606E SST25VF016B
F25L008A W25Q80 MX25L8006E SST25VF080B

Related Files

  • Handler: manufacturers/ESMTHandler.java
  • Component types: MEMORY, MEMORY_FLASH, IC

Learnings & Edge Cases

  • Leading zeros in F25L: SPI Flash density codes have leading zeros (004, 008, 016)
  • Scaled encoding in F49L: Parallel Flash uses 160=16Mbit, 320=32Mbit encoding
  • Configuration encoding: SDRAM part numbers encode bus width and bank count
  • Speed grade in suffix: Speed appears before package code after hyphen (e.g., -6TG = 6ns + TSOP-II)
  • Industrial grade suffix: PAIG = SOP package with Industrial Grade indicator
  • Version letters: A, B, C indicate silicon revisions, not always form/fit/function compatible

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