Datasheet

DIN
DOUT
DRDY
SCLK
CS
(1)
ADS1258
SPISIMO
SPISOMI
XINT1
SPICLK
SPISTA
TMS320R2811
(1) CS may be tied low.
DIN
DOUT
DRDY
SCLK
CS
(1)
ADS1258
(1) CS may be tied low.
P1.3
P1.2
P1.0
P1.6
P1.4
MSP430
GPIOx
(Input)
GPIOx
(Output)
ADS1258
4.7k
Ω
10k
Ω
Key Pad
3.3V
3.3V
470
LED Indicator
DIN
DOUT
DRDY
SCLK
CS
(1)
ADS1258
(1) CS may be tied low.
MOSI
MISO
INT
SCK
IO
MSC12xx or
68HC11
ADS1258-EP
www.ti.com SBAS445D –MARCH 2009– REVISED MARCH 2011
DIGITAL INTERFACE CONNECTIONS
The ADS1258 SPI-compatible interface easily
connects to a wide variety of microcontrollers and
DSPs. Figure 64 shows the basic connection to TI's
MSP430 family of low-power microcontrollers.
Figure 65 shows the connection to microcontrollers
with an SPI interface such as the 68HC11 family, or
TI's MSC12xx family. Note that the MSC12xx
includes a high-resolution ADC; the ADS1258 can be
used to provide additional channels of measurement
or add higher-speed connections. Finally, Figure 66
shows how to connect the ADS1258 to a TMS320x
DSP.
Figure 66. Connection to a TMS320R2811 DSP
GPIO Connections
The ADS1258 has eight general purpose input/output
(GPIO) pins. Each pin can be configured as an input
or an output. Note that pins configured as inputs
should not float. The pins can be used to read key
pads, drive LED indicator, etc., by reading and writing
the GPIO data register (GPIOD). See Figure 67.
Figure 64. Connection to MSP430 Microcontroller
Figure 67. GPIO Connections
Figure 65. Connection to Microcontrollers with an
SPI Interface
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Product Folder Link(s): ADS1258-EP