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#687 – The RP2350 with the Raspberry Pi Team

 
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Manage episode 463601115 series 1244155
Konten disediakan oleh Dave Jones & Chris Gammell, Dave Jones, and Chris Gammell. Semua konten podcast termasuk episode, grafik, dan deskripsi podcast diunggah dan disediakan langsung oleh Dave Jones & Chris Gammell, Dave Jones, and Chris Gammell atau mitra platform podcast mereka. Jika Anda yakin seseorang menggunakan karya berhak cipta Anda tanpa izin, Anda dapat mengikuti proses yang diuraikan di sini https://id.player.fm/legal.

Welcome James Adams, Chris Boross, Liam Fraser, and Luke Wren!

  • The last time the RPi team was on the show was about the RP1 (#648)
  • The order of parts being released was RP2040->RP1->RP2350
  • Check out the datasheet for the RP2350
  • Learning from silicon
  • Security and power states
  • The part is a “Dual dual core”
  • The Arm side is a Dual M33
  • The RISC V side is a Hazard 3 processor, designed by Luke based on a previous processor called the Hazard 5
  • HB5
  • There is a mux on the core and you select which side you’re going to use at boot
  • There are 48 GPIO (but users always want more)
  • Chris Boross (first time on the show) is on the commercial team. He’s seing interesting applications for the RP2350 including devices that are using it for motor control.
  • They also have seen the part used in satellites because mRAM or masked ROM is less susceptible to radiation errors
  • The PIOs have changed, but are more evolutionary from the RP2040
  • The PIO allows you to create state machines that process inputs without processor interventions, basically like tiny cores
  • 2 cores – 8 total
  • Interesting PIO applications
  • The core frequency only increased 133 MHz -> 150 MHz. There is tougher timing with the M33
  • LVT – lower voltage threshhold
  • 30 -> 40 pins
  • There are now variants listed on the RP2350 product page (but not in mass production) that include flash in the SOM package
  • RP2040 was one power domain
  • “Powerman” (and of course AVR Man)
  • Switched core
  • AON – always on
  • 32 kHz
  • There is a C/C++ SDK that is the basis for other ports
  • Security is a focus for the RP2350
  • Bootrom in every chip
  • Secure boot
  • M33 features – secure / non-secure
  • RISC V PMP
  • RCP – Redundancy Coprocessor
  • Raspberry Pi had a challenge / bounty for getting the secret out of the RP2350 OTP with secure boot
  • One of the few silicon companies doing this sort of thing in public
  • Past guest Aedan Cullen was one of the hacks called “Hazardous threes”. He gave a talk about it at 38C3
  • Past guest Colin O’Flynn was also mentioned because collaboration around side channel attacks with the Chip Whisperer
  • IOActive used a FIB – Fine Ion Beam – and passive voltage contrast to capture an impressive image of a decapped chip (see the RPi post)
  • “Never want to see ‘novel technique’ in an email”
  • Improving the RP2350 silicon
  • How do you decide what to fix/leave?
  • Can it be changed in metal/vias?
  • SIO spinlock not being fixed
  • Chicken Bit
  • Filler cells are reprogrammable and help with fixes
  • It costs approximately $50K per layer to change (ostensibly because of the high costs of masks)
  • ULA – uncommitted logic array
  • Die shrink doesn’t seem to make sense
  • Will keep making each chip as long as 40 nm fabs are around
  • Thinking about the RP2040
  • The easiest way to get started is to use a Pico (RP2040) or a Pico 2 (RP2350). Both have connectivity options as well.
  • Raspberry Pi is now a public company! Doesn’t change much other than the business scrutiny.
  continue reading

68 episode

Artwork
iconBagikan
 
Manage episode 463601115 series 1244155
Konten disediakan oleh Dave Jones & Chris Gammell, Dave Jones, and Chris Gammell. Semua konten podcast termasuk episode, grafik, dan deskripsi podcast diunggah dan disediakan langsung oleh Dave Jones & Chris Gammell, Dave Jones, and Chris Gammell atau mitra platform podcast mereka. Jika Anda yakin seseorang menggunakan karya berhak cipta Anda tanpa izin, Anda dapat mengikuti proses yang diuraikan di sini https://id.player.fm/legal.

Welcome James Adams, Chris Boross, Liam Fraser, and Luke Wren!

  • The last time the RPi team was on the show was about the RP1 (#648)
  • The order of parts being released was RP2040->RP1->RP2350
  • Check out the datasheet for the RP2350
  • Learning from silicon
  • Security and power states
  • The part is a “Dual dual core”
  • The Arm side is a Dual M33
  • The RISC V side is a Hazard 3 processor, designed by Luke based on a previous processor called the Hazard 5
  • HB5
  • There is a mux on the core and you select which side you’re going to use at boot
  • There are 48 GPIO (but users always want more)
  • Chris Boross (first time on the show) is on the commercial team. He’s seing interesting applications for the RP2350 including devices that are using it for motor control.
  • They also have seen the part used in satellites because mRAM or masked ROM is less susceptible to radiation errors
  • The PIOs have changed, but are more evolutionary from the RP2040
  • The PIO allows you to create state machines that process inputs without processor interventions, basically like tiny cores
  • 2 cores – 8 total
  • Interesting PIO applications
  • The core frequency only increased 133 MHz -> 150 MHz. There is tougher timing with the M33
  • LVT – lower voltage threshhold
  • 30 -> 40 pins
  • There are now variants listed on the RP2350 product page (but not in mass production) that include flash in the SOM package
  • RP2040 was one power domain
  • “Powerman” (and of course AVR Man)
  • Switched core
  • AON – always on
  • 32 kHz
  • There is a C/C++ SDK that is the basis for other ports
  • Security is a focus for the RP2350
  • Bootrom in every chip
  • Secure boot
  • M33 features – secure / non-secure
  • RISC V PMP
  • RCP – Redundancy Coprocessor
  • Raspberry Pi had a challenge / bounty for getting the secret out of the RP2350 OTP with secure boot
  • One of the few silicon companies doing this sort of thing in public
  • Past guest Aedan Cullen was one of the hacks called “Hazardous threes”. He gave a talk about it at 38C3
  • Past guest Colin O’Flynn was also mentioned because collaboration around side channel attacks with the Chip Whisperer
  • IOActive used a FIB – Fine Ion Beam – and passive voltage contrast to capture an impressive image of a decapped chip (see the RPi post)
  • “Never want to see ‘novel technique’ in an email”
  • Improving the RP2350 silicon
  • How do you decide what to fix/leave?
  • Can it be changed in metal/vias?
  • SIO spinlock not being fixed
  • Chicken Bit
  • Filler cells are reprogrammable and help with fixes
  • It costs approximately $50K per layer to change (ostensibly because of the high costs of masks)
  • ULA – uncommitted logic array
  • Die shrink doesn’t seem to make sense
  • Will keep making each chip as long as 40 nm fabs are around
  • Thinking about the RP2040
  • The easiest way to get started is to use a Pico (RP2040) or a Pico 2 (RP2350). Both have connectivity options as well.
  • Raspberry Pi is now a public company! Doesn’t change much other than the business scrutiny.
  continue reading

68 episode

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