Analog Inputs - Rabbit Core RCM3700 User Manual

5.2.2 Analog Inputs

NOTE: The function calls for the A/D converter in this section will work only with the
RCM3700 Prototyping Board.
unsigned int anaInConfig(unsigned int
instructionbyte, unsigned int cmd, long baud);
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.1.5 provides additional
addressing and command information for the ADS7870 A/D converter.
ADS7870 Signal ADS7870 State
LN0
LN1
LN2
LN3
LN4
LN5
LN6
LN7
/RESET
RISE/FALL
PIO0
PIO1
PIO2
PIO3
CONVERT
BUSY
CCLKCNTRL
CCLK
SCLK
SDI
SDO
/CS
BUFIN
VREF
BUFOUT
RabbitCore RCM3700 User's Manual
Input AIN0
Input AIN1
Input AIN2
Input AIN3
Input AIN4
Input AIN5
Input AIN6
Input AIN7
Input Board reset device
Input Pulled up for SCLK active on rising edge
Input Pulled down
Input Pulled down
Input Pulled down
Input Pulled down
Input Pulled down
Output PD1 pulled down; logic high state converter is busy
Input Pulled down; 0 state sets CCLK as input
Input Pulled down; external conversion clock
Input PB0; serial data transfer clock
Input PD4; 3-wire mode for serial data input
Output PD5; serial data output /CS driven
Input PD2 pulled up; active-low enables serial interface
Input Driven by VREF; reference buffer amplifier
Output Connected to BUFIN
Output VREF output
RCM3700 Function/State
42