
Timing Parameter Symbology
SPNS110E – AUGUST 2005 – REVISED MAY 2008 ......................................................................................................................................................... www.ti.com
Timing parameter symbols have been created in accordance with JEDEC Standard 100. To shorten the symbols,
some of the pin names and other related terminology have been abbreviated as follows:
CM
Compaction, CMPCT
RD
Read
CO
CLKOUT
RST
Reset, RST
ER
Erase
RX
SCInRX
ICLK
Interface clock
S
Slave mode
M
Master mode
SCC
SCInCLK
OSC, OSCI
OSCIN
SIMO
SPInSIMO
OSCO
OSCOUT
SOMI
SPInSOMI
P
Program, PROG
SPC
SPInCLK
R
Ready
SYS
System clock
R0
Read margin 0, RDMRGN0
TX
SCInTX
R1
Read margin 1, RDMRGN1
Lowercase subscripts and their meanings are:
a
access time
r
rise time
c
cycle time (period)
su
setup time
d
delay time
t
transition time
f
fall time
v
valid time
h
hold time
w
pulse duration (width)
The following additional letters are used with these meanings:
H
High
X
Unknown, changing, or don't care level
L
Low
Z
High impedance
V
Valid
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Copyright 2005–2008, Texas Instruments Incorporated