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
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 command (initial byte (0x00) - LEN - COM )
|
| ETB |
Footer of data frame |
0x17 Always
|
| ETX |
Command frame footer |
0x03 Always
|