Figure 7-2 Essi Control Register A (Cra); Figure 7-3 Essi Control Register B (Crb); Figure 7-4 Essi Status Register (Ssisr) - Motorola DSP56309 User Manual

¥ Three transmit data registers (TX0, TX1, TX2)
¥ One receive data register (RX)
¥ Two transmit slot mask registers (TSMA, TSMB) illustrated in Figure 7-5 and
Figure 7-6
¥ Two receive slot mask registers (RSMA, RSMB) illustrated in Figure 7-7 and
Figure 7-8
¥ One special-purpose time slot register (TSR)
The following paragraphs give detailed descriptions and operations of each of the bits in
the ESSI registers. The GPIO functionality of the ESSI is documented in
Section 7.6ÑGPIO Signals and Registers of this manual.
11 10 9
PSR
23 22 21
SSC1 WL2
11 10 9
CKP FSP FSR
23 22 21
REIE TEIE RLIE
11 10 9
23 22 21
MOTOROLA
8 7 6
PM7 PM6
20 19 18
WL1 WL0 ALC

Figure 7-2 ESSI Control Register A (CRA)

(ESSI0 X:$FFFFB5, ESSI1 X:$FFFFA5)
8 7 6
FSL1 FSL0 SHFD
20 19 18
TLIE RIE TIE

Figure 7-3 ESSI Control Register B (CRB)

(ESSI0 X:$FFFFB6, ESSI1 X:$FFFFA6)
8 7 6
RDF TDE
20 19 18

Figure 7-4 ESSI Status Register (SSISR)

(ESSI0 X:$FFFFB7, ESSI1 X:$FFFFA7)
DSP56309UM/D
Enhanced Synchronous Serial Interface (ESSI)
5 4 3
PM5 PM4 PM3
17 16 15
DC4 DC3
5 4 3
SCKD SCD2 SCD1
17 16 15
RE TE0 TE1
5 4 3
ROE TUE RFS
17 16 15
ESSI Programming Model
2 1
PM2 PM1 PM0
14 13
DC2 DC1 DC0
AA0857
2 1
SCD0 OF1 OF0
14 13
TE2 MOD SYN
AA0858
2 1
TFS IF1
14 13
AA0859
7-9
0
12
0
12
0
IF0
12