ESAI_1 Programming Model
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
9-12 Freescale Semiconductor
9.3.12 ESAI_1 Time Slot Register (TSR_1)
The write-only Time Slot Register (TSR_1) is effectively a null data register that is used when the data is
not to be transmitted in the available transmit time slot. The transmit data pins of all the enabled
transmitters are in the high-impedance state for the respective time slot where TSR_1 has been written.
The Transmitter External Buffer Enable pin (FSR_1 pin when SYN=1, TEBE=1, RFSD=1) disables the
external buffers during the slot when the TSR_1 register has been written.
9.3.13 Transmit Slot Mask Registers (TSMA_1, TSMB_1)
The Transmit Slot Mask Registers (TSMA_1 and TSMB_1) are two read/write registers used by the
transmitters in network mode to determine for each slot whether to transmit a data word and generate a
transmitter empty condition (TDE=1), or to tri-state the transmitter data pins. TSMA_1 and TSMB_1
should each be considered as containing half a 32-bit register TSM_1. See Figure 9-11 and Figure 9-12.
Bit number N in TSM_1 (TS**) is the enable/disable control bit for transmission in slot number N.
9.3.14 Receive Slot Mask Registers (RSMA_1, RSMB_1)
The Receive Slot Mask Registers (RSMA_1 and RSMB_1) are two read/write registers used by the
receiver in network mode to determine for each slot whether to receive a data word and generate a receiver
full condition (RDF=1), or to ignore the received data. RSMA_1 and RSMB_1 should be considered as
each containing half of a 32-bit register RSM_1. See Figure 9-13 and Figure 9-14. Bit number N in
RSM_1 (RS**) is an enable/disable control bit for receiving data in slot number N.
11109876543210
Y:$FFFF99 TS11 TS10 TS9 TS8 TS7 TS6 TS5 TS4 TS3 TS2 TS1 TS0
23 22 21 20 19 18 17 16 15 14 13 12
TS15 TS14 TS13 TS12
Reserved bit - read as zero; should be written with zero for future compatibility.
Figure 9-11 TSMA_1 Register
11109876543210
Y:$FFFF9A TS27TS26TS25TS24TS23TS22TS21TS20TS19TS18TS17TS16
23 22 21 20 19 18 17 16 15 14 13 12
TS31 TS30 TS29 TS28
Reserved bit - read as zero; should be written with zero for future compatibility.
Figure 9-12 TSMB_1 Register