ad5501 Analog Devices, Inc., ad5501 Datasheet - Page 14

• Manufacturer Part Number: ad5501
• Description: High Voltage, 12-bit Voltage Output Dac
• Manufacturer: Analog Devices, Inc.

AD5501
Table 9. Control Register Functions
DB15
R/ W
C0 = 1 : thermal shutdown mode activated
1
INTERFACING EXAMPLES
The SPI interface of the AD5501 is designed to allow the it to be
easily connected to industry-standard DSPs and microcontrollers.
Figure 13 shows how the AD5501 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
AD5501, as well as programmable input/output pins that can be
used to set or read the state of the digital input or output pins
associated with the interface.
C0 = 0 : device is not in thermal shutdown mode
C1 = 0 : enable temp shutdown(Default)
C1 =1 : disable temp shutdown
C2 = 0 : DAC channel power-down (Default)
C2 = 1 : DAC channel power-up
C3 to C5: Reserved. These bits should be 0 when writing to the Control register
C6 = 0 : Ouput connected to AGND through a 20kΩ resistor (Default)
C6 = 1 : Output is three-stated
Read only bit. This bit should be 0 when writing to the Control register
ADSP-BF531
DB14
1
Figure 13. Interfacing to a Blackfin DSP
DB13
1
SPISELx
MOSI
MISO
PF10
SCK
PF9
PF8
PF7
DB12
1
DB11
X
DB10
X
SYNC
SCLK
SDI
SDO
R_SEL
LDAC
CLR
ALARM
AD5501
DB9
X
Rev. Pr B | Page 14 of 15
DB8
X
X
DB7
The Analog Devices
two serial ports (SPORTs). Figure 14 shows how one SPORT
can be used to control the AD5501. In this example, the transmit
frame synchronization (TFS) pin is connected to the receive
frame synchronization (RFS) pin. The transmit and receive
clocks (TCLK and RCLK) are also connected together. The user
can write to the AD5501 by writing to the transmit register. If a
read operation is being performed the data is clocked out of the
AD5501 on the last 12 SCLKs. The DSP receive interrupt can be
used to indicate when the read operation is complete.
DB6
C6
ADSP-21065L
Figure 14. Interfacing to an ADSP-21065L DSP
DB5
C5
RCLKx
TCLKx
FLAG
FLAG
FLAG
FLAG
Preliminary Technical Data
DRxA
RFSx
DTxA
TFSx
ADSP-21065L
0
1
2
3
DB4
C4
DB3
C3
is a floating point DSP with
DB2
C2
SYNC
SCLK
SDI
SDO
R_SEL
LDAC
CLR
ALARM
AD5501
DB1
C1
DB0
C0
1