nuvoton - SKILL.md Agent Skill

name: nuvoton description: Nuvoton Technology MPN encoding patterns, suffix decoding, and handler guidance. Use when working with Nuvoton MCUs, audio codecs, TPM chips, or NuvotonHandler.

Nuvoton Technology Manufacturer Skill

MPN Structure

Nuvoton has multiple product families with different MPN structures:

ARM Cortex-M MCUs (NUC, M-series)

NUC[SERIES][LINE][PIN][FLASH][PKG][TEMP][VER]
│     │      │    │     │      │    │     │
│     │      │    │     │      │    │     └── Version (0, 1, etc.)
│     │      │    │     │      │    └── Temperature (N=normal, A=automotive)
│     │      │    │     │      └── Package type (A=QFN, etc.)
│     │      │    │     └── Flash size code
│     │      │    └── Pin code (LD=48, SD=64, VD=100, ZD=144)
│     │      └── Line number (23, 40, etc.)
│     └── Series (1=Cortex-M0, 2=Cortex-M0)
└── NuMicro prefix

M[LINE][PIN][FLASH][PKG]
│  │    │     │      │
│  │    │     │      └── Package code (AE=LQFP-48)
│  │    │     └── Flash size code
│  │    └── Pin code (LD=48, SD=64, LG=100, KI=128)
│  └── Line number (031=entry, 451=motor, 480=high-perf)
└── M-series prefix

Example Decoding

NUC123LD4AN0
│  │  │ │││││
│  │  │ ││││└── Version 0
│  │  │ │││└── Temperature N (normal)
│  │  │ ││└── Package A (QFN)
│  │  │ │└── Flash 4 (64KB)
│  │  │ └── Pin LD (LQFP-48)
│  │  └── Line 23
│  └── Series 1 (Cortex-M0)
└── NUC prefix

M451LG6AE
│  │ │ ││
│  │ │ │└── Package E (LQFP variant)
│  │ │ └── Package A (LQFP)
│  │ └── Flash 6 (512KB)
│  └── Pin LG (LQFP-100)
└── M451 series (Cortex-M4 motor control)

Package Codes

NUC Series Pin Codes

Code	Package	Pin Count
LD	LQFP-48	48
LE	LQFP-48	48
SD	LQFP-64	64
SE	LQFP-64	64
VD	LQFP-100	100
VE	LQFP-100	100
ZD	LQFP-144	144
AN	QFN-33	33

M-Series Pin Codes

Code	Package	Pin Count
LD	LQFP-48	48
LC	LQFP-48	48
SD	LQFP-64	64
SC	LQFP-64	64
LG	LQFP-100	100
VG	LQFP-100	100
KI	LQFP-128	128
ZG	LQFP-144	144
ZI	LQFP-144	144

8051 MCU Package Codes

Code	Package
AT	TSSOP-20
AS	SOP-20
AQ	QFN-20
FB	TSSOP-20
DA	TSSOP-16
BA	TSSOP-8
AE	LQFP-48

Audio Codec Package Codes

Code	Package
YG	QFN-32
YGB	QFN-32
LG	WLCSP
G	QFN-48

Product Families

ARM Cortex-M MCUs

Series	Core	Features	Max Clock
NUC1xx	Cortex-M0	General purpose	50MHz
NUC2xx	Cortex-M0	Enhanced peripherals	72MHz
M031	Cortex-M0	Entry-level	48MHz
M451	Cortex-M4	Motor control	72MHz
M480	Cortex-M4	High performance	192MHz

8051-Based MCUs

Series	Core	Features
N76E003	8051	Low-cost, small footprint
MS51	Enhanced 8051	More peripherals

Audio Codecs

Series	Type	Features
NAU8810	Mono Codec	Single input/output
NAU8822	Stereo Codec	Dual input/output
NAU88L25	Low Power Codec	Battery applications

Security ICs

Series	Type	Features
NPCT6xx	TPM 2.0	Trusted Platform Module

Flash Size Encoding

NUC Series

Code	Flash Size
2	16KB
3	32KB
4	64KB
5	128KB
6	256KB

M-Series (Numeric)

Code	Flash Size
2	32KB
3	64KB
4	128KB
5	256KB
6	512KB

M480 Series (Letter)

Code	Flash Size
A	128KB
B	256KB
C	384KB
D	512KB

Handler Implementation Notes

Package Code Extraction

// NUC series: Pin code is after line number
// NUC123LD4AN0 -> LD determines package

// M-series: Pin code is after series number
// M451LG6AE -> LG determines package

// N76E series: Package code is 2-letter prefix of pin count
// N76E003AT20 -> AT = TSSOP, 20 = pins

Series Extraction

// NUC1xx and NUC2xx return generic series
if (upperMpn.matches("^NUC1\\d{2}.*")) return "NUC1xx";
if (upperMpn.matches("^NUC2\\d{2}.*")) return "NUC2xx";

// M-series returns exact line number
if (upperMpn.startsWith("M031")) return "M031";
if (upperMpn.startsWith("M451")) return "M451";
if (upperMpn.startsWith("M480")) return "M480";

// NAU88L must be checked before NAU88
if (upperMpn.matches("^NAU88L\\d{2}.*")) return "NAU88L";

Official Replacement Logic

// MCUs: Same series AND same pin count are replacements
// Audio Codecs: Same series are replacements (package variants OK)

Related Files

Handler: manufacturers/NuvotonHandler.java
Component types: MICROCONTROLLER, IC

Learnings & Edge Cases

NUC vs M naming: NUC series uses full format (NUC123LD4AN0), M-series is shorter (M451LG6AE)
N76E003 popularity: Most popular Nuvoton 8051 MCU due to low cost and Arduino compatibility
NAU88L prefix: NAU88L25 must match before generic NAU88xx pattern
M480 flash encoding: Uses letters (A-D) instead of numbers for flash size
Pin code position varies: NUC at position 6, M-series at position 4, N76E at end of MPN
TPM chips: NPCT6xx series are security ICs, not MCUs