Datasheet

 2010-2012 Microchip Technology Inc. DS41412F-page 451
PIC18(L)F2X/4XK22
FIGURE 27-8: CLKOUT AND I/O TIMING
Note: Refer to Figure 27-6 for load conditions.
OSC1
CLKOUT
I/O pin
(Input)
I/O pin
(Output)
Q4
Q1
Q2 Q3
10
13
14
17
20, 21
19
18
15
11
12
16
Old Value
New Value
TABLE 27-10: CLKOUT AND I/O TIMING REQUIREMENTS
Param.
No.
Symbol Characteristic Min Typ Max Units Conditions
10 TosH2ckL OSC1  to CLKOUT  — 75 200 ns (Note 1)
11 TosH2ckH
OSC1  to CLKOUT  — 75 200 ns (Note 1)
12 TckR
CLKOUT Rise Time — 35 100 ns (Note 1)
13 TckF
CLKOUT Fall Time — 35 100 ns (Note 1)
14 TckL2ioV
CLKOUT  to Port Out Valid — — 0.5 T
CY + 20 ns (Note 1)
15 TioV2ckH
Port In Valid before CLKOUT  0.25 T
CY + 25 — — ns (Note 1)
16 TckH2ioI
Port In Hold after CLKOUT  0——ns(Note 1)
17 TosH2ioV
OSC1  (Q1 cycle) to Port Out Valid — 50 150 ns
18 TosH2ioI
OSC1  (Q2 cycle) to Port Input Invalid
(I/O in hold time)
100 — — ns
19 TioV2osH
Port Input Valid to OSC1 (I/O in setup time) 0 — — ns
20 TioR
Port Output Rise Time —
—
40
15
72
32
ns
ns
V
DD = 1.8V
V
DD = 3.3V - 5.0V
21 TioF
Port Output Fall Time —
—
28
15
55
30
ns
ns
V
DD = 1.8V
V
DD = 3.3V - 5.0V
22† T
INP
INTx pin High or Low Time 20 — — ns
23† T
RBP
RB<7:4> Change KBIx High or Low Time TCY ——ns
† These parameters are asynchronous events not related to any internal clock edges.
Note 1: Measurements are taken in RC mode, where CLKOUT output is 4 x T
OSC.