There are several functions that the sequence manager is controlling.
1.
Sequence manager outputs to external devices
2.
On/Off control of clocks, battery save signals etc...
3.
Clock frequency selection for correction paths
4.
DCOC register selection coarse, medium and fine modes
The HARMONY LITE has two sets of SPI interfaces; one set is for handling the control interface for the transceiver (AUXSPI lines) and ones for interfacing with POG
(SPI lines). Further, all SPI interface is generated from POG and written to HARMONY_LITE or parsed through to the MAXIM (U200 & U310) parts.
Layer one timing signals control the functionality of the RF section of the transceiver relative to the air interface. There are three signals defined on each transmit and
receive section of the transceiver. TX_PRE_KEY and RX_ON are asserted before the need to receive or transmit in order to launch the necessary sequence of events to
warm up the required functional blocks. TX_RAMP and RX_AQUIRE are asserted when actual transmission and reception are to begin. RX_SLOT and TX_SLOT are
used during continuous transmission and reception to trigger events that must be aligned with slot boundaries. It's important to reiterate, the TX_RAMP directly corre-
sponds to the PA turning on and RX_AQUIRE corresponds to data being sent to the WCSP.