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laforge, 02/19/2016 10:48 PM
add links to data sheets and note about timer input clock
PageOutline = Calypso Digital Baseband =
The Calypso Digital Base Band chip is a popular DBB implementation for inexpensive feature phones.
The register-level manuals seem to have leaked at some point and are available from cryptome.org
at http://cryptome.org/ti-calypso2.pdf and http://cryptome.org/ti-calypso.pdf
=== I2C Controller ===
The controller has two oddities:
* It assumes that the peripheral has an address byte. If your peripheral doesn't, you have to
write the first byte into the address register and not the FIFO
* You cannot under-fill the FIFO, i.e. if you write 8 bytes into the 16byte deep fifo, the controller
will transmit 16 bytes rather than 8. Therefore, always limit the FIFO depth to your write size!
More details about this can be seen at [wiki:CalypsoI2CFIFO]
=== Timers ===
The timer input clock is not mentioned in the data sheet. It seems to be 13MHz / 32, i.e. 406.25kHz
Updated by laforge about 8 years ago · 5 revisions