FreeCalypso > hg > freecalypso-docs
comparison FC-modem-family @ 26:1e76655a44bd
FC-modem-family: grammar fix
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 07 Dec 2019 18:39:12 +0000 |
parents | 69ee60206c53 |
children | 7aed57fc1928 |
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25:c01155dec65b | 26:1e76655a44bd |
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94 Because GPIO3/DTR is an input, it needs to be either sensibly driven or tied | 94 Because GPIO3/DTR is an input, it needs to be either sensibly driven or tied |
95 off. On our current FCDEV3B this line has a 100 kOhm pull-down resistor to GND, | 95 off. On our current FCDEV3B this line has a 100 kOhm pull-down resistor to GND, |
96 but it is not accessible to the user in any way - this design aspect was copied | 96 but it is not accessible to the user in any way - this design aspect was copied |
97 from TI's Leonardo board before I thought better. Most of our future FC modem | 97 from TI's Leonardo board before I thought better. Most of our future FC modem |
98 products are planned to have DTR as a user input signal (which the user can tie | 98 products are planned to have DTR as a user input signal (which the user can tie |
99 off it is not used or needed in a given application), but if there is no DTR | 99 off if it is not used or needed in a given application), but if there is no DTR |
100 user input signal on a given modem product, then GPIO3 will be grounded inside | 100 user input signal on a given modem product, then GPIO3 will be grounded inside |
101 the modem to keep the firmware happy. | 101 the modem to keep the firmware happy. |
102 | 102 |
103 Calypso's unused DSR_MODEM/LPG pin was left unconnected in Openmoko's version | 103 Calypso's unused DSR_MODEM/LPG pin was left unconnected in Openmoko's version |
104 but on our FCDEV3B it is tied to GND on the board. Future FC modem family | 104 but on our FCDEV3B it is tied to GND on the board. Future FC modem family |