It's certainly an improvement, but note that that 40-pin connector has 12 power/ground pins, and therefore only 28 GPIOs. (Oh, and 2 are dedicated to an I2C for ID)
Cheers
Ed
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| Raspberry Pi Model B+ 512MB RAM http://anycpu.org/forum/viewtopic.php?f=17&t=150 |
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| Author: | Chuckt [ Mon Jul 21, 2014 8:05 pm ] |
| Post subject: | Raspberry Pi Model B+ 512MB RAM |
Quote: Here's a brief overview of what's new •Dual step-down (buck) power supply for 3.3V and 1.8V •5V supply has polarity protection, 2A fuse and hot-swap protection (so you can plug/unplug USB without resetting the board) •New USB/Ethernet controller chip •4 USB ports instead of 2 ports •40 GPIO pins instead of 26. The top/first 26 pins match the original layout, 9 additional GPIO and 2 EEPROM Plate identification pins •Composite (NTSC/PAL) video now integrated into 4-pole 3.5mm 'headphone' jack •MicroSD card socket instead of full size SD •Four mounting holes in rectangular layout •Many connectors moved around There is TinyBasic for the Rasberry Pi and I was also thinking that for $40, I think it is possible to add a system to the 6502 family of chips if you want something cheap to control because there are now 40 GPIO pins. |
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| Author: | BigEd [ Mon Jul 21, 2014 9:21 pm ] |
| Post subject: | Re: Raspberry Pi Model B+ 512MB RAM |
It's certainly an improvement, but note that that 40-pin connector has 12 power/ground pins, and therefore only 28 GPIOs. (Oh, and 2 are dedicated to an I2C for ID) Cheers Ed |
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| Author: | Dajgoro [ Tue Oct 28, 2014 11:05 pm ] |
| Post subject: | Re: Raspberry Pi Model B+ 512MB RAM |
I got to poke a bit with one of those. I don't like the way the pins are arranged, it is a mess to work with. Also, the new model has no composite out, so I can only use it via ssh. |
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| Author: | Chuckt [ Mon Nov 10, 2014 2:15 pm ] |
| Post subject: | Re: Raspberry Pi Model B+ 512MB RAM |
There is a new model in the works and it is smaller and cheaper and it is going to have a touch screen: "Also notable with the A+ is its 40-pin GPIO socket, which should enable it to use any expansion cards designed with the HAT standard." http://hothardware.com/News/Raspberry-P ... picks=true |
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| Author: | BigEd [ Mon Nov 10, 2014 4:00 pm ] |
| Post subject: | Re: Raspberry Pi Model B+ 512MB RAM |
Bear in mind the A+ has no ethernet connection - suitable for the basis of a portable appliance, perhaps. (You could add a USB wifi dongle...) |
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| Author: | Chuckt [ Mon Feb 02, 2015 11:11 pm ] |
| Post subject: | Re: Raspberry Pi Model B+ 512MB RAM |
BigEd wrote: It's certainly an improvement, but note that that 40-pin connector has 12 power/ground pins, and therefore only 28 GPIOs. (Oh, and 2 are dedicated to an I2C for ID) Cheers Ed I'm curious as to how others use the Raspberry Pi as a disk drive if there isn't enough I/O for being a GPU? http://amigadrive.blogspot.co.uk/ |
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| Author: | BigEd [ Tue Feb 03, 2015 3:19 pm ] |
| Post subject: | Re: Raspberry Pi Model B+ 512MB RAM |
What do you mean about a GPU? You'll see from the schematic in the article you linked that the 34-way floppy interface may have as few as 15 interesting signals. Unlike an IDE interface which is 40-way and has 16 bidirectional data lines - that's because it's for drives with Integrated Drive Electronics, so the drive includes the serial-parallel conversions. |
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