PXD10RM Datasheet, PDF (1012/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 30-5. Connectivity of signals on this device (continued)
Chip signal
SPI mode¹
Serial flash mode²
PF[14]
SOUT (Serial Data Out)
IO1
PF[15]
SCK (Serial Clock)
Clock Out
1 _{When connecting to an external SPI device, these definitions should be used as reference.}
2 _{When connection to a Quad Serial Flash, these definitions should be used as reference.}
30.3.2 Detailed Signal Description
The following paragraphs describe the function of the signals given in Table 30-4 in more detail. Only the
modes relevant to the specific signal are mentioned according to Table 30-4.
30.3.2.1 PCS_C0 — Peripheral Chip Select/Slave Select
In SPI Master Mode, the PCS0 signal is a Peripheral Chip Select output that selects which slave device the
current transmission is intended for.
In SPI Slave Mode, the SS signal is a Slave Select input signal that allows a SPI master to select the
QuadSPI as the target for transmission.
In Serial Flash Mode this signal is the chip select for the serial flash device.
30.3.2.2 PCS[3:1] — Peripheral Chip Selects 1 - 3
PCS[3:1] are Peripheral Chip Select output signals in SPI Master Mode.
30.3.2.3 PCS4 — Peripheral Chip Select 4
In SPI Master Mode, PCS4 is a Peripheral Chip Select output signal.
30.3.2.4 PCS[7:5] — Peripheral Chip Selects 5 - 7
PCS[7:5] are Peripheral Chip Select output signals in SPI Master Mode.
30.3.2.5 SI_IO0 — Serial Input, QuadSPI Data IO_0
SI is a serial data input signal in the SPI Master and SPI Slave Mode.
In the Serial Flash mode it is used as I/O bit 0.
30.3.2.6 SO_IO1 — Serial Output, QuadSPI Data IO_1
SO is a serial data output signal in the SPI Master and SPI Slave Mode. Note that the output buffer enable
signal belonging to the SO output is driven by the Slave Select input signal SS to allow for several slaves
driving one single SO line. The SO output line is High Impedance when in SPI Slave Mode the QuadSPI
module is not selected by the SPI master.
30-8
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor