PXD10RM Datasheet, PDF (1005/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Chapter 30
Quad Serial Peripheral Interface (QuadSPI)
30.1 Preface
30.1.1 Conventions
Table 30-1 contains conventions used in this document.
Table 30-1. Conventions
Terms
ACTIVE_HIGH
ACTIVE_LOW
0x0F
0b0011
x
REG[BIT]
Description
Names for signals that are active high are shown in uppercase text without an overbar. Signals
that are active high are referred to as asserted when they are logic 1 and negated when they
are logic 0.
A bar over a signal name indicates that the signal is active low. Active-low signals are referred
to as asserted when they are logic 0 and negated when they are logic 1.
Hexadecimal numbers
Binary numbers
In certain contexts, such as a signal encoding, this indicates a don’t care. For example, if a
field is binary coded 0bx001, the state of the first bit is a don’t care.
Denotes the bitfields BIT in the register REG
30.1.2 Acronyms and Abbreviations
Table 30-2 contains acronyms and abbreviations used in this document.
Table 30-2. Acronyms and Abbreviations
Terms
Description
AHB
Advanced High-performance Bus, version of AMBA
AMBA
Advanced Microcontroller Bus Architecture
CS
Chip Select.
DMA
Direct Memory Access.
EOQ
End of Queue
LSB
Least Significant Bit
MSB
Most Significant Bit
PCS
Peripheral Chip Select
QSPI, QuadSPI Quad Serial Peripheral Interface
SCK
Serial Communications Clock
SPI
Serial Peripheral Interface
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
30-1