Datasheet

 2010 Microchip Technology Inc. DS41303G-page 387
PIC18F2XK20/4XK20
FIGURE 26-6: CLKOUT AND I/O TIMING
TABLE 26-9: 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 TCY + 20 ns (Note 1)
15 TioV2ckH Port In Valid before CLKOUT  0.25 TCY + 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 — 10 25 ns
21 TioF Port Output Fall Time — 10 25 ns
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 TOSC.
Note: Refer to Figure 26-4 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