Barkley
Barkley is the codename of the PS Vita Motion Sensor. It is also referred as "Motion" in the System Software SDK.
The Barkley name most likely refers to the microcontroller, but could also designate the whole sensing subsystem.
Hardware
The motion sensing subsystem is made of four components:
- microcontroller
- communicates with Kermit via ?SPI?
- manages and samples the sensors
- accelerometer
- gyroscope
- compass
DEM-3000H
- Microcontroller: STMicroelectronics STM32F100R8H6B
- Accelerometer: Kionix KXTC9 (three-axis MEMS accelerometer IC)
- Gyroscope: ?
- Compass: ?
There are two ICs near the microcontroller with the following markings:
PR4100 2029 KGMBF
?Gyroscope? from unknown manufacturer
0C9 Y31 <QR-Code>
?Compass? from unknown manufacturer
Note: Both unknown ICs use a font on the package that looks like the STMicroelectronics font
PCH-1xxx
- Microcontroller: STMicroelectronics 'STM32P10SoE'
- Undocumented variant of the STM32F100
- Features to be documented
- Undocumented variant of the STM32F100
- Accelerometer: Kionix KXTC9
- Outputs analog data sampled by Barkley
- Gyroscope: ?
- Compass: Asahi KASEI AK8975C
- Connected to Barkley via I²C (7-bit slave address: 0x0C)
An IC with the following markings is found next to the KXTC9 and could be the gyroscope:
3GA51H 2141 QT1AU
It has the same form factor and footprint as the PR4100 from DEM-3000H.
Pinouts
The STM32P10SoE ballout appears to be identical to the STM32F100xx value line:
| Ball | Type | Description |
|---|---|---|
| A1 | - | N/C |
| A2 | - | N/C |
| A3 | - | N/C |
| A4 | - | N/C |
| A5 | - | N/C |
| A6 | - | N/C |
| A7 | - | N/C |
| A8 | - | N/C |
| B1 | - | N/C |
| B2 | PWR | VBAT |
| B3 | I | AK8975 DRDY interrupt |
| B4 | I | BOOT0 (tied to GND?) |
| B5 | ? | Kermit E25 |
| B6 | - | N/C |
| B7 | ? | Pulled-down via a resistor near STM32P10SoE. Pull up to do something? |
| B8 | - | N/C |
| C1 | I | OSC_IN - Oscillator Input |
| C2 | PWR | VSS_4 |
| C3 | I/O | AK8975 I²C data |
| C4 | - | N/C |
| C5 | - | N/C |
| C6 | ? | Serial input (115200 8N1) - exposed via test point near Ernie shield |
| C7 | ? | Serial output (115200 8N1) - exposed via test point near Ernie shield |
| C8 | - | N/C |
| D1 | O | OSC_OUT - Oscillator Output |
| D2 | PWR | VDD_4 |
| D3 | O | AK8975 I²C clock |
| D4 | PWR | VSS_3 |
| D5 | PWR | VSS_2 |
| D6 | PWR | VSS_1 |
| D7 | - | N/C |
| D8 | ? | 3GA51H pin 25 |
| E1 | I | nRST (Ernie J4) |
| E2 | - | N/C |
| E3 | ? | ? |
| E4 | PWR | VDD_3 |
| E5 | PWR | VDD_2 |
| E6 | PWR | VDD_1 |
| E7 | - | N/C |
| E8 | - | 3GA51H pin 23 |
| F1 | PWR | VSSA (Analog domain) |
| F2 | I | KXTC9 pin 6 (X-axis) |
| F3 | ? | ? |
| F4 | ? | ? |
| F5 | ? | 3GA51H pin 7 |
| F6 | ? | Kermit A26 |
| F7 | I | Kermit SPI1 MOSI (Kermit Z12) |
| F8 | O | Kermit SPI1 MISO (Kermit AA13) |
| G1 | PWR | VREF+ (ADC reference voltage) |
| G2 | ? | ? |
| G3 | - | N/C |
| G4 | I | KXTC9 pin 8 (Z-axis) |
| G5 | ? | 3GA51H pin 1 |
| G6 | I | PB2/BOOT1 - tied to GND |
| G7 | - | N/C |
| G8 | I | Kermit SPI1 clock (Kermit Z13) |
| H1 | PWR | VDDA (Analog domain) |
| H2 | ? | Connected to a 3-pin IC near GC slot |
| H3 | ? | Exposed via test point near Ernie shield |
| H4 | ? | 3GA51H pin 5 |
| H5 | I | KXTC9 pin 7 (Y-axis) |
| H6 | ? | 3GA51 pin 3 |
| H7 | - | N/C |
| H8 | I | Kermit SPI1 chip select (Kermit AA12) |
The 3GA51H IC is linked only to the STM32P10SoE - all other pins are used for power or left unconnected.
USS-1001
- Microcontroller: ?
- Accelerometer: ?
- Gyroscope: ?
- Compass: Alps Alpine 40108D