
PIC18FXX39
DS30485A-page 268
Preliminary
2002 Microchip Technology Inc.
23.3
AC (Timing) Characteristics
23.3.1
TIMING PARAMETER SYMBOLOGY
The timing parameter symbols have been created
following one of the following formats:
1. TppS2ppS
3. TCC:ST
(I2C specifications only)
2. TppS
4. Ts
(I2C specifications only)
T
F
Frequency
T
Time
Lowercase letters (pp) and their meanings:
pp
cc
CCP1
osc
OSC1
ck
CLKO
rd
RD
cs
CS
rw
RD or WR
di
SDI
sc
SCK
do
SDO
ss
SS
dt
Data in
t0
T0CKI
io
I/O port
t1
T13CKI
mc
MCLR
wr
WR
Uppercase letters and their meanings:
S
F
Fall
P
Period
HHigh
R
Rise
I
Invalid (Hi-impedance)
V
Valid
L
Low
Z
Hi-impedance
I2C only
AA
output access
High
BUF
Bus free
Low
TCC:ST (I2C specifications only)
CC
HD
Hold
SU
Setup
ST
DAT
DATA input hold
STO
STOP condition
STA
START condition