21.7.2 Tiny Programming Interface Physical Layer Control Register
| Name: | TPIPCR |
| Reset: | 0x00 |
| Property: | CSS: 0x02 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| GTn[2:0] | |||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 | ||||||
Bits 2:0 – GTn[2:0] Guard Time [n=2:0]
These bits specify the number of additional IDLE bits that are inserted to the idle time when changing from reception mode to transmission mode. Additional delays are not inserted when changing from transmission mode to reception.
The total idle time when changing from reception to transmission mode is Guard Time plus two IDLE bits.
| GT2 | GT1 | GT0 | Guard Time (Number of IDLE bits) |
|---|---|---|---|
| 0 | 0 | 0 | +128 (default value) |
| 0 | 0 | 1 | +64 |
| 0 | 1 | 0 | +32 |
| 0 | 1 | 1 | +16 |
| 1 | 0 | 0 | +8 |
| 1 | 0 | 1 | +4 |
| 1 | 1 | 0 | +2 |
| 1 | 1 | 1 | +0 |
The default Guard Time is 128 IDLE bits. To speed up the communication, the Guard Time should be set to the shortest safe value.