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Signed-off-by: Michel-FK <michel.stempin@funkey-project.com>
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Michel-FK
2021-01-30 16:14:23 +01:00
parent 5d8b166393
commit 1b6404b211
13 changed files with 120 additions and 72 deletions
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8
docs/developers/hardware_ref/cpu.md
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@@ -156,7 +156,8 @@ The V3s chips requires 2 crystals:
- one low-frequency [32.768 kHz crystal][8] **Y1** for the RTC clock
- one high-frequency [24 MHz crystal][9] **Y2** for deriving the 1.2 GHz clock
- one high-frequency [24 MHz crystal][9] **Y2** for deriving the 1.2
GHz clock
The 24 MHz crystal is used by an internal oscillator to lock the phase
of the 1.2 GHz oscillator using a PLL (Phase-Locked Loop).
@@ -178,8 +179,9 @@ application note from STM][10].
## DRAM
The DRAM within the V3s chip is a [DDR2 one][11], meaning that its data
lines are clocked using both edges of an up to 400 MHz clock signal.
The DRAM within the V3s chip is a [DDR2 one][11], meaning that its
data lines are clocked using both edges of an up to 400 MHz clock
signal.
At these high frequencies, even short wires have a length that is of
the same order of magnitude as the signal's [wavelength][12] and thus

3
docs/developers/hardware_ref/magnetic_switch.md
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@@ -25,7 +25,8 @@ We found only a unique plastic-molded model which almost meets our
low-profile requirements of 1.5 mm (1.6 mm height!): the [Standex
Meder MK24][1].
Here is the corresponding schematics, already covered in the PMIC discussion:
Here is the corresponding schematics, already covered in the PMIC
discussion:
![Magnetic Sensor Schematics](/assets/images/Magnetic_Sensor_Schematics.png){: .lightbox}

8
docs/developers/hardware_ref/usb.md
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@@ -42,10 +42,10 @@ maximum bulk capacitance value to 10 µF in order to avoid power supply
excessive droops when plugin in a device with a discharged large bulk
capacitor.
**D15** is a [NXP PRTR5V0U2X,215][2] combined TVS protection diode for the VBUS pin and a set
of clamping diodes that will limit the voltage on D+ and D- pins to
stay between GND and VBUS levels to in order to protect the V3s USB
driver from under / over-voltages.
**D15** is a [NXP PRTR5V0U2X,215][2] combined TVS protection diode for
the VBUS pin and a set of clamping diodes that will limit the voltage
on D+ and D- pins to stay between GND and VBUS levels to in order to
protect the V3s USB driver from under / over-voltages.
[1]: https://github.com/FunKey-Project/FunKey-S-Hardware/blob/master/Datasheets/C40958_MICRO5P%E6%B2%89%E6%9D%BF%E5%BC%8F0.8%E5%9B%9B%E8%84%9A%E5%85%A8%E6%8F%92%E6%97%A0%E5%AF%BC%E4%BD%8D%E6%9C%89%E5%AD%94%E8%80%90%E9%AB%98%E6%B8%A9_2016-05-20.PDF
[2]: https://github.com/FunKey-Project/FunKey-S-Hardware/blob/master/Datasheets/C12333_PRTR5V0U2X%2C215_2017-10-31.PDF

11
docs/developers/software_ref/index.md
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@@ -9,13 +9,14 @@ boot time.
## Instant Action
The **FunKey S** introduces a unique feature called **_Instant Action_**,
which enables automatically saving the running state when closing
the console before turning it off, and restoring this state when
opening and turning it back on in a matter of seconds.
The **FunKey S** introduces a unique feature called **_Instant
Action_**, which enables automatically saving the running state when
closing the console before turning it off, and restoring this state
when opening and turning it back on in a matter of seconds.
This feature is only possible because of the optimized fast boot time
detailed in the [Boot Process](boot_process/boot_process_intro.md) section.
detailed in the [Boot Process](boot_process/boot_process_intro.md)
section.
## Storage