Introduction
MFR4310 Reference Manual, Rev. 2
Freescale Semiconductor 27
1.4 Part Number Coding
Figure 1-1. Order Part Number Coding
Table 1-2. Notational Conventions
active-high Names of signals that are active-high are shown in upper case text, without a # symbol at the end.
Active-high signals are asserted (active) when they are high and deasserted when they are low.
active-low An active-low signal is asserted (active) when it is at the logic low level and is deasserted when it is at the
logic high level.
Note: A # symbol at the end of a signal name indicates that the signal is active-low.
asserted A signal that is asserted is in its active logic state. An active-low signal changes from high to low when
asserted; an active-high signal changes from low to high when asserted.
deasserted A signal that is deasserted is in its inactive logic state. An active-low signal changes from low to high when
deasserted; an active-high signal changes from high to low when deasserted.
set To set a bit means to establish logic level one on the bit.
clear To clear a bit means to establish logic level zero on the bit.
0x0F The prefix 0x denotes a hexadecimal number.
0b0011 The prefix 0b denotes a binary number.
x In certain contexts, such as a signal encoding, this indicates don’t care. For example, if a field is binary
encoded 0bx001, the state of the most significant bit is don’t care.
== Used in equations, this symbol signifies comparison.
# A # symbol at the end of a signal name indicates that the signal is active-low.
S FR 4310 J1 M AE 40
Speed Option
Temperature Option
Device Title
Controller Family
Qualification
Package Option
40 = 40 MHz
AE = 64-pin Lead Free/Halide Free LQFP
M = -40
o
C to +125
o
C
S = Maskset specific part number
Maskset Identifier First character usually identifies wafer fab
Second character usually identifiesSuffix
mask revision
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