Hello, On 10 mrt, 19:07, Joep Suijs <[email protected]> wrote: > 2009/3/10 Sebastien Lelong <[email protected]>:>> 1x5 sil for iscp > or do you want a RJ11 6/6 connector like ICD2 from > >> microchip or both or a complete different one?. > > > Is 1x5 sil for ICSP this (in the middle) ? > > that's a 1x5 sil, but not sure if it used for ICSP > > >http://www.adrirobot.it/scheda_demo_pic18f4550/scheda_input-output_18... > > > Are 5 pins required because: 1 for serial (RX) + 2 for i2c + 2 for power ?
At this moment I have 6 pin sil connector for 5V, TxD,RxD,SCL,SDA and 0V. Why add 7V ? It does not matter how many pins the connector is because you only use the ones you need, so for serial only 2 (RxD and 0V) or 3 (RxD, 5V and 0V). and for i2c only 3 (SCL,SDA, 0V) or 4 (SCL,SDA, 5V and 0V) > > No, ICSP is for programming only. My schematics has an (non-standard) > 8-pin ICSP, the basic one + serial rx/tx + PGM (for low voltage > programming - I don't think I actually use it, but it is on the > wisp...) i use a 6 pin sil with insertion guide so you can not attach it wrong :-) > > > I'm thinking again about flow control. If the controller needs to send back > > ACK once a command is processed (so you can send next one), maybe it could > > be interested to also add a wire for serial/TX ? That would give 6 wires for > > this connector, and would allow us to implement this feature later, but with > > the same board (a new firmware). What do guys think ? > > I'd prefer a 6-pin connector (or 7, when you add +7v) over a smaller > one and jumpers to select the signal. This because you can use all > signals at the same time if you have a use for it. > An alternative would be 2 connectors - one for i2c and one for serial > (and that one with rx and tx). > i prefer 1 connector to keep the pcd as compact as possible. I also added 5V stabilized power circuit, when you don’t need it you don’t put the components on. (backlight uses on hd44780 more than 120mA). You can use the 5V from your main print or power your main print from this lcd print, i will add a 3 way jumper so no wrong connections (smoke) On the other hand if we make the lay-out for people to make there own pcb we can create several types, for instance: -for hd44780 (1x16 sil and 2x8 dil) with 5V stabilized power and without. -for dog-m with 5V stabilized power and without. So 4 choices. But of course I can combine them to 1 pcb (how do you attach a file Joep?) Richard --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/jallib?hl=en -~----------~----~----~----~------~----~------~--~---
