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AD28MSP02 Datasheet(PDF) 5 Page - Analog Devices

Part No. AD28MSP02
Description  Voiceband Signal Port
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD28MSP02 Datasheet(HTML) 5 Page - Analog Devices

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AD28msp02
REV. 0
–5–
Note that the ADSP-2101’s SPORT0 communicates with the
AD28msp02’s SPORT while the ADSP-2101’s Flag Output
(FO) is used to signal the AD28msp02’s DATA/CNTRL input.
SPORT1 on the ADSP-2101 must be configured for flags and
interrupts in this system.
Figure 6 shows an ADSP-2101 assembly language program that
initializes the AD28msp02 and implements digital loopback
through the DSP processor.
SDO
SDOFS
SCLK
DATA/CNTRL
SDI
SDIFS
AD28msp02
DR0
RFS0
SCLK0
FO
DT0
TFS0
ADSP-2101
Figure 5. AD28msp02-to-ADSP-2101 Interface
{ This ADSP-2101 program initializes the AD28msp02 }
{ and executes a loopback, or talk-through, routine. }
.MODULE/ABS = 0/BOOT = 0 test1;
resetv:
JUMP begin;
{restart}
RTI; RTI; RTI;
irq2v:
RTI; RTI; RTI; RTI;
{IRQ2}
st0x:
RTI; RTI; RTI; RTI;
{SPORT0 Tx}
sr0x:
ax0 = rx0;
{SPORT0 Rx}
tx0 = ax0;
RTI; RTI;
irq1v:
RTI; RTI; RTI; RTI;
{irq1}
irq0v:
RTI; RTI; RTI; RTI;
{irq0}
timerv:
RTI; RTI; RTI; RTI;
begin:
RESET FLAG OUT;
AX0 = 0x2A0F;
{Configure ADSP-2101 SPORT0 for }
DM (0x3FF6) = AX0;
{ ext. SCLK, ext. RFS, int. TFS }
AX0 = 0x101F;
{ Enable ADSP-2101 SPORT0, }
DM (0x3FFF) = AX0;
{ configure SPORT1 for Flag Out }
IMASK= 0x10;
AX0 = 0x30;
{ Write control word to take}
TX0 = AX0;
{ AD28msp02 out of powerdown }
IDLE;
NOP;
IMASK= 0x08;
SET FLAG OUT;
wait:
JUMP wait;
{ Wait for receive interrupt }
NOP;
.ENDMOD;
Figure 6. ADSP-2101 Digital Loopback Routine


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