Baryon

Baryon is the codename for the PSP Syscon (System Controller) chip. Communication with this chip is done through SPI.

Versions

Version	Notes
0x00020601	First known version. Found on TMU-001 motherboard.
0x00030600
0x00040600
0x00114000
0x00121000
0x0022B200
0x00234000	Removed ability to write to battery EEPROM.
0x00243000
0x00263100
0x00285000
?0x002A0000?	From hypothetical TA-094 motherboard.
0x002C4000
0x002E4000
0x00304000
0x00403000

Hardware

Hardware versions

• Note: You can usually deduce the serial number of the system controller chip on the motherboard when knowing Baryon version. For example, 0x00030600 has the BAR14 labelled chip, while 0x00040600 has the BAR15 labelled chip.

Hardware Signature (3AXX)

02 13 10 7f 04 7c 7f 7f 02 c4 37 38 46 b0 b5 b3 34 20 20 79 03 5d 03

Meaning

10 Vendor (Renessas)
7F Extension code (fixed in 78K0/Kx2)
04 Function information (fixed in 78K0/Kx2)
7C Device Extension code (fixed in 78K0/Kx2)
7F 7F 02 Internal flash memory last address (extracted from the lower bytes)  (0x2FFFF)
C4 37 38 46 B0 B5 B3 34 20 20 Device name (D78F0534)
79 Security flag information
03 Boot block number (fixed)

Notes

Note 2. Order of Internal Flash Memory Last Address is Swapped

Note 3. When security flag information is set using the Security Set command, the highest bit is fixed to “1”.  If the security flag information is read using the Silicon Signature command, however, the highest bit is the odd parity. 

Hardware Revision (3AXX)

D78F0534

• custom BGA 78K0/KE2
• 48 KB FLASH
• 1KB RAM

Pictures

<imgur w="500">32tdUCq.png</imgur>