36
RabbitCore RCM3600
5.2.2 Analog Inputs
Use this function to configure the ADS7870 A/D converter. This function will address the ADS7870 in
Register Mode only, and will return error if you try the Direct Mode. Section B.4.2 provides additional
addressing and command information for the ADS7870 A/D converter.
unsigned int anaInConfig(unsigned int
instructionbyte, unsigned int cmd, long baud);
ADS7870 Signal
ADS7870 State
RCM3600 Function/State
LN0
Input
AIN0
LN1
Input
AIN1
LN2
Input
AIN2
LN3
Input
AIN3
LN4
Input
AIN4
LN5
Input
AIN5
LN6
Input
AIN6
LN7
Input
AIN7
/RESET
Input
Board reset device
RISE/FALL
Input
Pulled up for SCLK active on rising edge
PIO0
Input
Pulled down
PIO1
Input
Pulled down
PIO2
Input
Pulled down
PIO3
Input
Pulled down
CONVERT
Input
Pulled down
BUSY
Output
PD1 pulled down; logic high state converter is busy
CCLKCNTRL
Input
Pulled down; 0 state sets CCLK as input
CCLK
Input
Pulled down; external conversion clock
SCLK
Input
PB0; serial data transfer clock
SDI
Input
PD4; 3-wire mode for serial data input
SDO
Output
PD5; serial data output /CS driven
/CS
Input
PD2 pulled up; active-low enables serial interface
BUFIN
Input
Driven by VREF; reference buffer amplifier
VREF
Output
Connected to BUFIN
BUFOUT
Output
VREF output
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