AD5442ABCPZ-1-RL7 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'AD5442ABCPZ-1-RL7' PDF : 24 Pages View PDF
AD5512A/AD5542A
APPLICATIONS INFORMATION
MICROPROCESSOR INTERFACING
Microprocessor interfacing to the AD5512A/AD5542A is via
a serial bus that uses standard protocol that is compatible with
DSP processors and microcontrollers. The communications
channel requires a 3- or 4-wire interface consisting of a clock
signal, a data signal, and a synchronization signal. The
AD5512A/AD5542A require a 16-bit data-word with data
valid on the rising edge of SCLK. The DAC update can be
done automatically when all the data is clocked in, or it can
be done under the control of the LDAC.
AD5512A/AD5542A TO ADSP-BF531 INTERFACE
The SPI interface of the AD5512A/AD5542A is designed to be
easily connected to industry-standard DSPs and micro-
controllers. Figure 33 shows how the AD5512A/AD5542A
can be connected to the Analog Devices, Inc., Blackfin® DSP.
The Blackfin has an integrated SPI port that can be connected
directly to the SPI pins of the AD5512A/AD5542A.
SPISELx
SCK
MOSI
ADSP-BF531
PF9
AD5512A/
AD5542A
CS
SCLK
DIN
LDAC
Figure 33. AD5512A/AD5542A to ADSP-BF531 Interface
AD5512A/AD5542A TO SPORT INTERFACE
The Analog Devices ADSP-BF527 has one SPORT serial port.
Figure 34 shows how one SPORT interface can be used to
control the AD5512A/AD5542A.
SPORT_TFS
SPORT_TSCK
SPORT_DTO
AD5512A/
CS AD5542A
SCLK
DIN
ADSP-BF527
GPIO0
LDAC
Figure 34. AD5512A/AD5542A to ADSP-BF527 Interface
Data Sheet
AD5512A/AD5542A TO 68HC11/68L11 INTERFACE
Figure 35 shows a serial interface between the AD5512A/
AD5542A and the 68HC11/68L11 microcontroller. SCK of
the 68HC11/68L11 drives the SCLK of the DAC, and the
MOSI output drives the serial data line serial DIN. The CS
signal is driven from one of the port lines. The 68HC11/68L11 is
configured for master mode: MSTR = 1, CPOL = 0, and CPHA =
0. Data appearing on the MOSI output is valid on the rising
edge of SCK.
68HC11/
68L11*
PC6
PC7
MOSI
SCK
LDAC
CS AD5512A/
DIN AD5542A*
SCLK
*ADDITIONAL PINS OMITTED FOR CLARITY.
Figure 35. AD5512A/AD5542A to 68HC11/68L11 Interface
AD5512A/AD5542A TO MICROWIRE INTERFACE
Figure 36 shows an interface between the AD5512A/AD5542A
and any MICROWIRE-compatible device. Serial data is shifted
out on the falling edge of the serial clock and into the AD5512A/
AD5542A on the rising edge of the serial clock. No glue logic
is required because the DAC clocks data into the input shift
register on the rising edge.
CS
MICROWIRE* SO
SCLK
CS
AD5512A/
DIN AD5542A*
SCLK
*ADDITIONAL PINS OMITTED FOR CLARITY.
Figure 36. AD5512A/AD5542A to MICROWIRE Interface
Rev. B | Page 18 of 24
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