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SBAS288D − JUNE 2003 − REVISED AUGUST 2004
DIGITAL INTERFACE CONNECTIONS
ADS1255
ADS1256
MSC12xx or
68HC11
The ADS1255/6 5V tolerant SPI-, QSPI, and
MICROWIRE-compatible interface easily connects to a
wide variety of microcontrollers. Figure 26 shows the basic
connection to TI’s MSP430 family of low-power
microcontrollers. Figure 27 shows the connection to
microcontrollers with an SPI interface like TI’s MSC12xx
family or the 68HC11 family. Note that the MSC12xx
includes a high-resolution A/D converter; the ADS1255/6
can be used to add additional channels of measurement
or provide higher-speed conversions. Finally, Figure 28
shows how to connect the ADS1255/6 to an 8xC51 UART
in serial mode 0 in a 2-wire configuration. Avoid using the
continuous read mode (RDATAC) when DIN and DOUT
are connected together.
DIN
MOSI
MISO
INT
DOUT
DRDY
SCLK
CS(1)
SCK
IO
(1) CS may be tied low.
Figure 27. Connection to Microcontrollers with
an SPI Interface
ADS1255
ADS1256
MSP430
ADS1255
ADS1256
8xC51
DIN
P1.3
P1.2
P1.0
P1.6
P1.4
DOUT
DRDY
SCLK
CS(1)
DIN
P3.0/RXD
DOUT
DRDY
SCLK
CS
P3.1xTXD
(1) CS may be tied low.
DGND
Figure 26. Connection to MSP430
Microcontroller
Figure 28. Connection to 8xC51 Microcontroller
UART with a 2-Wire Interface
29
BB [ BURR-BROWN CORPORATION ]
