The signature section is a dedicated memory area used for storing miscellaneous device information, such as the device signature. Most of this memory section is reserved for internal use.
| Signature word address | Configuration word data | |
|---|---|---|
| High byte | Low byte | |
| 0x00 | Device ID 1 | Manufacturer ID |
| 0x01 | Reserved for internal use | Device ID 2 |
| 0x02 ... 0x0F | Reserved for internal use | Reserved for internal use |
ATtiny4/5/9/10 have a three-byte signature code, which can be used to identify the device. The three bytes reside in the signature section, as shown in the above table. The signature data for ATtiny4/5/9/10 is given in the next table.
| Part | Signature Bytes | ||
|---|---|---|---|
| Manufacturer ID | Device ID 1 | Device ID 2 | |
| ATtiny4 | 0x1E | 0x8F | 0x0A |
| ATtiny5 | 0x1E | 0x8F | 0x09 |
| ATtiny9 | 0x1E | 0x90 | 0x08 |
| ATtiny10 | 0x1E | 0x90 | 0x03 |