DSP201 Burr-Brown Corporation, DSP201 Datasheet - Page 18

• Manufacturer Part Number: DSP201
• Description: DSP-Compatible Single/Dual DIGITAL-TO-ANALOG CONVERTERS
• Manufacturer: Burr-Brown Corporation

FIGURE 14. Using DSP201 with ADSP-2105.
USING DSP201 AND DSP202 WITH ADI DSP ICS
When using the DSP201 or DSP202 with the ADSP2101 or
ADSP2105, the processors need to be programmed to trans-
mit the data with the MSB first.
Figure 14 shows the connections required to generate an
analog output channel using an ADSP2105 with the DSP201.
The same basic circuit can also be used to connect a DSP201
to the ADSP2101.
Figure 6 indicates how to build a complete analog input and
analog output system using either the ADSP2101 or
ADSP2105 with a DSP201 and a Burr-Brown DSP101 A/D.
The two serial ports on the ADSP2101 can also be used with
the DSP202 to make two complete analog output channels
as noted in footnote 2 of Figure 10.
USING DSP201 AND
DSP202 WITH AT&T DSP ICS
Figures 15, 16 and 17 show how to use the DSP201 and
DSP202 with the DSP16 and DSP32C in different modes.
The DSP IC needs to be programmed to transmit data with
the MSB first, and the DSP201 or DSP202 needs to have
SSF (Select Sync Format on pin 9) tied LOW so that the
®
DSP201/202
Conversion Rate
ADSP2105
Generator
NOTE: (1) 16-bit MSB first data.
SCLK1
DT1
TFS1
(1)
TTL Bit
Clock
+5V
+5V
12
13
11
10
15
18
9
D/As will output an appropriate active Low synchronization
pulse after a Convert Command is received.
Figures 15 and 17 show the DSP32C and DSP16 respec-
tively used with the DSP201 in the 16-bit Mode to generate
a single analog output channel. With a 12MHz Bit Clock and
the 24 Bit Clock cycles required by the DSP201 and DSP202
between Convert Commands, the output of Figure 15 can be
updated at a full 500kHz (12MHz/24 = 500kHz.)
Figure 16 shows how to drive two analog output channels
from a single 32-bit serial port on the DSP32C, using the
Cascade Mode on the DSP202. With a 12MHz Bit Clock
and the 40 Bit Clock cycles required between Convert
Commands by the DSP for internal logic overhead, this
circuit can update two separate analog outputs at 300kHz
each from a single serial port (12MHz/40 = 300kHz.)
Figure 6 indicates how to build a complete analog input and
analog output system using a DSP32C or DSP16 with a
DSP201 and a Burr-Brown DSP101 A/D.
Figure 7 shows a two channel analog output system using a
single DSP202 with two DSP32Cs or two DSP16s.
XCLK
SIN
SYNC
SSF
SWL
CONV
DSP201
VOUT
21
±3V Analog Output