NXP Semiconductors MPC5566 - An[12]_Ma[0]_Sds

Signal Description
MPC5566 Microcontroller Reference Manual, Rev. 2
2-32 Freescale Semiconductor
2.3.8.13 Analog Input / Mux Address 0 / eQADC Serial Data Strobe
AN[12]_MA[0]_SDS
AN[12]_MA[0]_SDS is an analog input pin. The alternate function, MA[0], is a MUX address pin. SDS
is the serial data strobe for the eQADC SSI; this function is selected by setting the PA field of
SIU_PCR215 to GPIO. This pin has reduced analog to digital conversion accuracy as compared to the
AN[0:7] and AN[16:39] analog input pins because they are powered by V
DDEH9
and can be used as digital
pins for the synchronous serial interface (SSI) to external ADCs or used as the multiplexor digital outputs
(MA[0]).
SDS is the serial data select output that is muxed with AN[12] and MA[0]. It indicates to the external
(slave) device when it can latch incoming serial data, when it can output its own serial data, and when it
must abort a data transmission. SDS corresponds to the chip select signal in a conventional SPI interface.
This pin is configured by setting the pad configuration register, SIU_PCR215.
2.3.8.14 Analog Input / Mux Address 1 / eQADC Serial Data Out
AN[13]_MA[1]_SDO
AN[13]_MA[1]_SDO is an analog input pin. The alternate function, MA[1], is a MUX address pin. SDO
is the serial data output for the eQADC SSI; this function is selected by setting the PA field of
SIU_PCR216 to GPIO. This pin has reduced analog to digital conversion accuracy as compared to the
AN[0:7] and AN[16:39] analog input pins because they are powered by V
DDEH9
and can be used as digital
pins for the synchronous serial interface (SSI) to external ADCs or used as the multiplexor digital outputs
(MA[1]).
This pin is configured by setting the pad configuration register, SIU_PCR216.
2.3.8.15 Analog Input / Mux Address 2 / eQADC Serial Data In
AN[14]_MA[2]_SDI
AN[14]_MA[2]_SDI is an analog input pin. The alternate function, MA[2], is a MUX address pin. SDI is
the serial data input for the eQADC SSI; this function is selected by setting the PA field of SIU_PCR217
to GPIO. This pin has reduced analog to digital conversion accuracy as compared to the AN[0:7] and
AN[16:39] analog input pins because they are powered by V
DDEH9
and can be used as digital pins for the
synchronous serial interface (SSI) to external ADCs or used as the multiplexor digital outputs (MA[2]).
This pin is configured by setting the pad configuration register, SIU_PCR217.
2.3.8.16 Analog Input / eQADC Free Running Clock
AN[15]_FCK
AN[15]_FCK is an analog input pin. The alternate function is the free running clock for the eQADC SSI.
This pin has reduced analog to digital conversion accuracy as compared to the AN[0:7] and AN[16:39]
analog input pins.
This pin is configured by setting the pad configuration register, SIU_PCR218.