Syscon Hardware

Syscon is, together with Aeolia, one of the main chips responsible for taking care of the functioning of APU, peripherals, etc. It is actually internally codenamed Colwick on the ps4 and the chip's structure is the same as one of a Renesas RL78.

Memory Layout

• TODO

Commands

Command ID	Name	Description	Notes
0x00	Reset	Detects synchronization in communication
0x9A	Baud Rate Set	Sets the baud rate for single-wire UART.
0x20	Chip Erase	Erases the entire flash memory area.
0x22	Block Erase	Erases a specified area in the flash memory.
0x40	Programming	Writes data to a specified area in the flash memory.
0x13	Verify	Compares the contents in a specified area in the flash memory with data transmitted from the programmer.
0x32	Block Blank Check	Checks the erase status of a specified block in the flash memory.
0xC0	Silicon Signature	Acquires 78K0R/Kx3 information (part number, flash memory configuration, etc.).
0xC5	Version Get	Acquires version information of the 78K0R/Kx3 and firmware.
0xB0	Checksum	Acquires checksum data of a specified area.
0xA0	Security Set	Sets security information.

Statuses

Command ID	Name	Description	Notes
04	Command number error	Error returned if a command not supported is received
05	Parameter error	Error returned if command information (parameter) is invalid
06	Normal acknowledgment (ACK)	Normal acknowledgment
07	Checksum error	Error returned if data in a frame transmitted from the programmer is abnormal
0F	Verify error	Error returned if a verify error has occurred upon verifying data transmitted from the programmer
10	Protect error	Error returned if an attempt is made to execute processing that is prohibited by the Security Set command
15	Negative acknowledgment (NACK)	Negative acknowledgment
1A	MRG10 error	Erase verify error
1B	MRG11 error	Internal verify error or blank check error during data write
1C	Write error	Write error
FF	Processing in progress (BUSY)	Busy response

Command Frame Format

• SOH | LEN | COM | INFO | SUM | ETX

Data Frame Format

• STX | LEN | DAT | SUM | ETX/ETB

Description of each symbol

Name	Description	Notes
SOH	Command Frame Header	0x01 Always
STX	Data Frame Header	0x02 Always
LEN	Length of info	In Command Frame: length of COM + command info length/ In Data frame: Data info length
COM	Command number
SUM	Checksum	checksum of all bytes (add all previous bytes and subtract 1 byte (&& 0xFF) for checksum)
ETB	Footer of data frame	0x17 Always
ETX	Command frame footer	0x03 Always