Essi Transmit 1 Enable (Te1) Crb Bit 15 - Motorola DSP56305 User Manual

Enhanced Synchronous Serial Interface (ESSI)
ESSI Programming Model
7.4.2.15

ESSI Transmit 1 Enable (TE1) CRB Bit 15

The TE1 bit enables the transfer of data from TX1 to Transmit Shift Register 1. TE1 is
functional only when the ESSI is in Synchronous mode and is ignored when the ESSI is
in Asynchronous mode.
When TE1 is set and a frame sync is detected, the transmitter 1 is enabled for that frame.
When TE1 is cleared, transmitter 1 is disabled after completing transmission of data
currently in the ESSI Transmit Shift Register. Any data present in TX1 is not transmitted.
If TE1 is cleared, data can be written to TX1; the TDE bit will be cleared, but data will not
be transferred to Transmit Shift Register 1.
Keeping the TE1 bit cleared until the start of the next frame causes the SC0 signal to act
as serial I/O flag from the start of the frame, in both Normal and Network mode. The
On-demand mode transmit enable sequence can be the same as the Normal mode, or the
TE1 bit can be left enabled.
The TE1 bit is cleared by either a hardware reset signal or a software reset instruction.
The setting of the TE1 bit does not affect the generation of frame sync or
Note:
output flags.
MOTOROLA DSP56305 User's Manual 7-29