Datasheet

© 2009 Microchip Technology Inc. DS39632E-page 385
PIC18F2455/2550/4455/4550
28.4 AC (Timing) Characteristics
28.4.1 TIMING PARAMETER SYMBOLOGY
The timing parameter symbols have been created
using one of the following formats:
1. TppS2ppS 3. T
CC:ST (I
2
C specifications only)
2. TppS 4. Ts (I
2
C specifications only)
T
F Frequency T Time
Lowercase letters (pp) and their meanings:
pp
ad SPP address write mc MCLR
cc CCP1 osc OSC1
ck CLKO rd RD
cs CS rw RD or WR
da SPP data write sc SCK
di SDI ss SS
do SDO t0 T0CKI
dt Data in t1 T13CKI
io I/O port wr WR
Uppercase letters and their meanings:
S
F Fall P Period
HHigh RRise
I Invalid (High-Impedance) V Valid
L Low Z High-Impedance
I
2
C only
AA output access High High
BUF Bus free Low Low
T
CC:ST (I
2
C specifications only)
CC
HD Hold SU Setup
ST
DAT DATA input hold STO Stop condition
STA Start condition