TI Calypso D751992AZHH

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CALYPSO ASIC digital baseband

Unfortunately we cannot provide many details on the GSM chipset due to very tight NDAs. However, this is not neccessarily required, since it interfaces using a standard UART serial line with the Samsung S3C2442B B54 or Samsung S3C2410. On that interface, GSM 07.05, GSM 07.10 and other standardized protocols are used. GTA01_gsm_modem provides a list of AT commands which are understood by the GSM modem.

The NDAd documentation for the calypso, register definition and hardware definition was leaked onto a public forum on the 4th of March by persons or persons unknown. The legality of reading these files may vary according to your local laws, as may generating code from them.

The GSM chip runs the proprietary Nucleos operating system on some ARM chip.

TI TWL3025BZGMR analog baseband

TI TRF6151 (GSM/PCS) RF Transceiver

GPRS Class12/CS4

Neo FreeRunner

Main article: Neo_FreeRunner_GTA02_Hardware


  • Connected to: Samsung S3C2442B B54 UART1 (full-uart, RxD, TxD, CTS, RTS),
  • Connected to (userspace): /dev/ttySAC0
  • Accessible GSM/GPRS antenna jack (if battery cover is removed) - MURATA MM8430-2610RB3 SMD RF TEST PORT. FOr compatible adapter see Murata part no. MXHS83QE3000
  • Calypso D751992AZHH
  • The firmware within GTA02 should be moko6 or later (internal code name)

Neo 1973

Main article: Neo_1973_hardware


  • Connected to: Samsung S3C2410 UART1 (full-uart, RxD, TxD, CTS, RTS),
  • Connected to (userspace): /dev/ttySAC0
  • Accessible GSM/GPRS antenna jack (if battery cover is removed)
Personal tools

CALYPSO ASIC digital baseband

Unfortunately we cannot provide many details on the GSM chipset due to very tight NDAs. However, this is not neccessarily required, since it interfaces using a standard UART serial line with the Samsung S3C2442B B54 or Samsung S3C2410. On that interface, GSM 07.05, GSM 07.10 and other standardized protocols are used. GTA01_gsm_modem provides a list of AT commands which are understood by the GSM modem.

The NDAd documentation for the calypso, register definition and hardware definition was leaked onto a public forum on the 4th of March by persons or persons unknown. The legality of reading these files may vary according to your local laws, as may generating code from them.

The GSM chip runs the proprietary Nucleos operating system on some ARM chip.

TI TWL3025BZGMR analog baseband

TI TRF6151 (GSM/PCS) RF Transceiver

GPRS Class12/CS4

Neo FreeRunner

Main article: Neo_FreeRunner_GTA02_Hardware


  • Connected to: Samsung S3C2442B B54 UART1 (full-uart, RxD, TxD, CTS, RTS),
  • Connected to (userspace): /dev/ttySAC0
  • Accessible GSM/GPRS antenna jack (if battery cover is removed) - MURATA MM8430-2610RB3 SMD RF TEST PORT. FOr compatible adapter see Murata part no. MXHS83QE3000
  • Calypso D751992AZHH
  • The firmware within GTA02 should be moko6 or later (internal code name)

Neo 1973

Main article: Neo_1973_hardware


  • Connected to: Samsung S3C2410 UART1 (full-uart, RxD, TxD, CTS, RTS),
  • Connected to (userspace): /dev/ttySAC0
  • Accessible GSM/GPRS antenna jack (if battery cover is removed)