Datasheet

© 2007 Microchip Technology Inc. DS39605F-page 259
PIC18F1220/1320
FIGURE 22-7: CLKO AND I/O TIMING
TABLE 22-7: CLKO AND I/O TIMING REQUIREMENTS
Note: Refer to Figure 22-5 for load conditions.
OSC1
CLKO
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
Param.
No.
Symbol Characteristic Min Typ Max Units Conditions
10 TosH2ckL OSC1↑ to CLKO↓ — 75 200 ns (Note 1)
11 TosH2ckH OSC1↑ to CLKO↑ — 75 200 ns (Note 1)
12 TckR CLKO Rise Time — 35 100 ns (Note 1)
13 TckF CLKO Fall Time — 35 100 ns (Note 1)
14 TckL2ioV CLKO↓ to Port Out Valid — — 0.5 T
CY + 20 ns (Note 1)
15 TioV2ckH Port In Valid before CLKO↑ 0.25 TCY + 25 — — ns (Note 1)
16 TckH2ioI Port In Hold after CLKO↑ 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)
PIC18F1X20 100 — — ns
18A PIC18LF1X20 200 — — ns
19 TioV2osH Port Input Valid to OSC1↑
(I/O in setup time)
0——ns
20 TioR Port Output Rise Time PIC18F1X20 — 10 25 ns
20A PIC18LF1X20 — — 60 ns
21 TioF Port Output Fall Time PIC18F1X20 — 10 25 ns
21A PIC18LF1X20 — — 60 ns
Note 1: Measurements are taken in RC mode, where CLKO output is 4 x T
OSC.