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wpwrak
2016-12-31 , 13:04
Posts: 79 | Thanked: 719 times | Joined on May 2014 @ Buenos Aires, Argentina
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We updated the IO expander white paper:
http://neo900.org/stuff/papers/iox.pdf
There were quite a number of changes, as the document's role progressed from specifying design requirements towards describing what we did in the schematics.
document current consumption of IO expander chips
list signal names of both block diagram and schematics (so far, it was either one or the other)
add pull-up resistors to shared sensor interrupt lines
change orientation of LOWER-UPPER connectors from parallel to "T"
update/correct various signals:
add more signals (MIC_nPRESET, SPEAKER_EN, ECI_EN, FM_nRST, MODEM_VMIC_SENSE, CELL_DETECT_IRQ)
add section for power configuration/status signals
remove IR control signals (we now use I2C for them)
update Hackerbus signals
add SWD to NFC MCU
update/correct reset signals (keyboard, FM, LEDs)
better track names in block diagram (BATT_LID, VMIC, the various SIM switch signals)
This specific version is at
http://neo900.org/stuff/papers/iox-20161231.pdf
The source can be found at
https://neo900.org/git/misc/tree/iox
- Werner
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