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4.2″ ST‐GR42

Velocet edited this page 2024-10-08 02:26:44 +02:00

Table of Contents

• Specs
• Models
• Photos
• ST-GR420x3N2 (e.g. GR42003N2, GR420B3N2)
• ST-GR42RG0
• Manual
• EPaper Display (SSD1619A) Pins
• Programming
• Original Firmware File Hashes

Specs

• ZBS243 (SEM9110) SoC (8051 based core) @ 16 MHz
  • 64 kB Flash ROM
  • 8 kB xRAM
  • 256 Bytes iRAM
  • 1 MB SPI Flash (???)
  • 802.15.4 Radio (2.4 Ghz)
• 4.2" SSD1619A EPaper Display (BWR) with 400 x 300 px
• 2 x CR2450 button cells
  • 3 x CR2450 button cells (GR42RG0/GM42KC0/GR42003N/GM42003N)
• Unknown NFC controller (N/N2 models only, see table)

Models

Model	MAC ID	Options	Note	Label
ST-GM42003	401		BW, No NFC
ST-GM42003N	403	NFC	BW
ST-GM42KC0	401		BW, No NFC, 3 x CR2450
ST-GR42003	481		BWR, No NFC
ST-GR42003N	483	NFC	BWR
ST-GR420x3N2	483	NFC	BWR, x = Case color
ST-GR42RG0	411		BWR, No NFC, 3 x CR2450

Tag Information		Note
FCC ID	2AFWN-ST-GR42003N	Solum tag
FCC ID	E2X-ST-GM42003N	Original Samsung tag

Note

MAC ID = tag size & type (2 digits, e.g. 48) + panel & nfc type (1 digit, e.g. 3)

Photos

ST-GR420x3N2 (e.g. GR42003N2, GR420B3N2)

Front	Back	PCB

ST-GR42RG0

Front	Back	PCB

Manual

• Solum S-TAG Datasheet (ST-GR42003N)
• Samsung S-TAG Datasheet (ST-GM42003N)

EPaper Display (SSD1619A) Pins

ZBS243	SSD1619	Note
P1.7	CS	Active Low
P2.1	Busy	Active High
P2.2	D/C	High for data / Low for commands
P2.0	RESET	Active Low
P0.0	SPI_CLK
P0.1	MOSI/MISO	Used for both; same pin to read data

Programming

Programming pins

Various programming jigs have been made for this tag.

It can be flashed using the AP-Flasher board or one of the various flashers in ATC1441's ZBS_Flasher repo.

Original Firmware File Hashes

Version	Type	MD5 (first 10kbyte)	Original Tag Mac (as written on case)	Note
031	ST-GR29000	52B8F6316BC2EB45231B23B2CD563B80	02393A793B16