Datasheet

DIN
DOUT
DRDY
SCLK
CS
(1)
ADS1158
SPISIMO
SPISOMI
XINT1
SPICLK
SPISTA
TMS320R2811
DIN
DOUT
DRDY
SCLK
CS
(1)
ADS1158
P1.3
P1.2
P1.0
P1.6
P1.4
MSP430
GPIOx
(Input)
GPIOx
(Output)
ADS1158
4.7kW
10kW
KeyPad
3.3V
3.3V
470
LEDIndicator
DIN
DOUT
DRDY
SCLK
CS
(1)
ADS1158
MOSI
MISO
INT
SCK
IO
MSC12xxor
68HC11
ADS1158
www.ti.com SBAS429D –JUNE 2008– REVISED MARCH 2011
DIGITAL INTERFACE CONNECTIONS
The ADS1158 SPI-compatible interface easily
connects to a wide variety of microcontrollers and
DSPs. Figure 50 shows the basic connection to TI's
MSP430 family of low-power microcontrollers.
Figure 51 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 ADS1158 can be
used to provide additional channels of measurement
or add higher-speed connections. Finally, Figure 52
shows how to connect the ADS1158 to a TMS320x
(1) CS may be tied low.
DSP.
Figure 52. Connection to TMS320R2811 DSP
GPIO Connections
The ADS1158 has eight 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 53.
(1) CS may be tied low.
Figure 50. Connection to MSP430 Microcontroller
Figure 53. GPIO Connections
(1) CS may be tied low.
Figure 51. Connection to Microcontrollers with an
SPI Interface
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