SWCU191 February 2022 CC1311P3 , CC1311R3 , CC2651P3 , CC2651R3 , CC2651R3SIPA
The samplestamp generator is used to start input and output DMA operation. The samplestamp generator is also used to synchronize I2S modules over a wireless network, so correct and fixed audio latency can be achieved. Synchronization over a wireless network is an optional feature that can be bypassed.
The samplestamp generator is enabled and is running while I2S:STMPCTL.STMP_EN = 1. Counter and capture registers are reset when software writes I2S:STMPCTL.STMP_EN = 0.
Figure 25-11 shows a simplified block diagram of the samplestamp generator: