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| − | The | + | The Texas Instruments SN99057RSBR is a power management IC used by the PS Vita in conjunction with the [http://www.ti.com/product/bq27520-g1 bq27520-G1] battery fuel gauge to manage the battery. There is a USB interface that is connected to a switch [http://www.ti.com/product/TS3USB31 TS3USB31RSER] with the main [[Kermit]] USB. When the PS Vita is powered off and connected to a PC, this chip is likely what the USB sees. Texas Instruments has stated that “the SN99057RSBR part was a custom device manufactured for a specific company.” |
| − | The device is now obsolete nor do we have access to the datasheet. | + | The device is now obsolete nor do we have access to the datasheet. |
| − | The current hypothesis is that this IC is responsible | + | The current hypothesis is that this IC is responsible of managing battery charging. |
== Pinout == | == Pinout == | ||
| Line 162: | Line 162: | ||
| 38 | | 38 | ||
| I/O | | I/O | ||
| − | | To | + | | To Syscon (G8) |
|- | |- | ||
| 39 | | 39 | ||
| Line 172: | Line 172: | ||
| SCL | | SCL | ||
|} | |} | ||
| + | |||
[[Category:Devices]] | [[Category:Devices]] | ||
Revision as of 21:19, 30 August 2021
The Texas Instruments SN99057RSBR is a power management IC used by the PS Vita in conjunction with the bq27520-G1 battery fuel gauge to manage the battery. There is a USB interface that is connected to a switch TS3USB31RSER with the main Kermit USB. When the PS Vita is powered off and connected to a PC, this chip is likely what the USB sees. Texas Instruments has stated that “the SN99057RSBR part was a custom device manufactured for a specific company.”
The device is now obsolete nor do we have access to the datasheet.
The current hypothesis is that this IC is responsible of managing battery charging.
Pinout
| Pin | Type | Description |
|---|---|---|
| 1 | ? | N/C |
| 2 | I/O | To bq27520-G1 A2 - SOC_INT, indicates battery charged > threshold |
| 3 | PWR | |
| 4 | PWR | |
| 5 | PWR | |
| 6 | I/O | To TS3USB31 USB D+ |
| 7 | I/O | To TS3USB31 USB D- |
| 8 | I/O | To Kermit GPIO B20 |
| 9 | I/O | To Kermit GPIO A23 |
| 10 | I/O | To Kermit GPIO A25 |
| 11 | ? | To passives |
| 12 | ? | To capacitor |
| 13 | PWR | |
| 14 | PWR | |
| 15 | PWR | Net 1 (Battery) |
| 16 | PWR | Net 1 (Battery) |
| 17 | PWR | Net 1 (Battery) |
| 18 | PWR | Net 2 |
| 19 | PWR | Net 2 |
| 20 | PWR | Net 2 |
| 21 | PWR | |
| 22 | ? | N/C |
| 23 | GND | |
| 24 | GND | |
| 25 | PWR | Net 3 |
| 26 | PWR | Net 3 |
| 27 | PWR | Net 4 |
| 28 | PWR | Net 4 |
| 29 | PWR | Net 4 |
| 30 | PWR | Net 4 |
| 31 | PWR | Net 5 |
| 32 | PWR | Net 5 |
| 33 | ? | To capacitor |
| 34 | PWR | Net 6 (USB VBUS) |
| 35 | PWR | Net 6 (USB VBUS) |
| 36 | GND | |
| 37 | I/O | To right daughterboard |
| 38 | I/O | To Syscon (G8) |
| 39 | I2C | SDA |
| 40 | I2C | SCL |