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AD5025 Fiches technique(PDF) 25 Page - Analog Devices

No de pièce AD5025
Description  Fully Accurate, 12-/14-/16-Bit VOUT nanoDAC, Quad, SPI Interface, 4.5 V to 5.5 V in TSSOP
Download  28 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD5025 Fiches technique(HTML) 25 Page - Analog Devices

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Data Sheet
AD5024/AD5044/AD5064
Rev. F | Page 25 of 28
MICROPROCESSOR INTERFACING
AD5024/AD5044/AD5064/AD5064-1 to Blackfin ADSP-
BF53x Interface
Figure 52 shows a serial interface between the AD5024/AD5044/
AD5064/AD5064-1 and the Blackfin® ADSP-BF53x microproces-
sor. The ADSP-BF53x processor family incorporates two dual-
channel synchronous serial ports, SPORT1 and SPORT0, for
serial and multiprocessor communications. Using SPORT0 to
connect to the AD5024/AD5044/AD5064/AD5064-1, the setup
for the interface is as follows: DT0PRI drives the DIN pin of the
AD5024/AD5044/AD5064/AD5064-1, and TSCLK0 drives the
SCLK of the parts. The SYNC pin is driven from TFS0.
AD5024/
AD5044/
AD5064/
AD5064-1*
ADSP-BF53x*
*ADDITIONAL PINS OMITTED FOR CLARITY.
SYNC
TFS0
DIN
DT0PRI
SCLK
TSCLK0
Figure 52. AD5024/AD5044/AD5064/AD5064-1 to Blackfin ADSP-BF53x
Interface
AD5024/AD5044/AD5064/AD5064-1 to 68HC11/68L11
Interface
Figure 53 shows a serial interface between the AD5024/AD5044/
AD5064/AD5064-1 and the 68HC11/68L11 microcontroller.
SCK of the 68HC11/68L11 drives the SCLK of the AD5024/
AD5044/AD5064/AD5064-1, and the MOSI output drives the
serial data line of the DAC.
AD5024/
AD5044/
AD5064/
AD5064-1*
68HC11/68L11*
*ADDITIONAL PINS OMITTED FOR CLARITY.
SYNC
PC7
SCLK
SCK
DIN
MOSI
Figure 53. AD5024/AD5044/AD5064/AD5064-1 to 68HC11/68L11 Interface
The SYNC signal is derived from a port line (PC7). The setup
conditions for correct operation of this interface are as follows:
The 68HC11/68L11 is configured with its CPOL bit as 0, and its
CPHA bit as 1. When data is being transmitted to the DAC, the
SYNC line is taken low (PC7). When the 68HC11/68L11 is
configured as described previously, data appearing on the MOSI
output is valid on the falling edge of SCK. Serial data from the
68HC11/68L11 is transmitted in 8-bit bytes with only eight
falling clock edges occurring in the transmit cycle. Data is
transmitted MSB first. To load data to the AD5024/AD5044/
AD5064, PC7 is left low after the first eight bits are transferred,
and a second serial write operation is performed to the DAC.
PC7 is taken high at the end of this procedure.
AD5024/AD5044/AD5064/AD5064-1 to 80C51/80L51
Interface
Figure 54 shows a serial interface between the AD5024/AD5044/
AD5064/AD5064-1 and the 80C51/80L51 microcontroller. The
setup for the interface is as follows: TxD of the 80C51/80L51
drives SCLK of the AD5024/AD5044/AD5064/AD5064-1, and
RxD drives the serial data line of the part. The SYNC signal is
again derived from a bit-programmable pin on the port. In this
case, Port Line P3.3 is used. When data is to be transmitted to the
AD5024/AD5044/AD5064/AD5064-1, P3.3 is taken low. The
80C51/80L51 transmit data in 8-bit bytes only; thus, only eight
falling clock edges occur in the transmit cycle. To load data to
the DAC, P3.3 is left low after the first eight bits are transmitted,
and a second write cycle is initiated to transmit the second byte of
data. P3.3 is taken high following the completion of this cycle.
The 80C51/80L51 output the serial data in a format that has the
LSB first. The AD5024/AD5044/AD5064/AD5064-1 must
receive data with the MSB first. The 80C51/80L51 transmit
routine should take this into account.
AD5024/
AD5044/
AD5064/
AD5064-1*
*ADDITIONAL PINS OMITTED FOR CLARITY.
DIN
RxD
SYNC
P3.3
80C51/80L51*
SCLK
TxD
Figure 54. AD5024/AD5044/AD5064/AD5064-1 to 80C512/80L51 Interface
AD5024/AD5044/AD5064/AD5064-1 to MICROWIRE
Interface
Figure 55 shows an interface between the AD5024/AD5044/
AD5064/AD5064-1 and any MICROWIRE-compatible device.
Serial data is shifted out on the falling edge of the serial clock and is
clocked into the AD5024/AD5044/AD5064/AD5064-1 on the
rising edge of the SCLK.
AD5024/
AD5044/
AD5064/
AD5064-1*
*ADDITIONAL PINS OMITTED FOR CLARITY.
SCLK
SO
SYNC
CS
MICROWIRE*
DIN
SK
Figure 55. AD5024/AD5044/AD5064/AD5064-1 to MICROWIRE Interface


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