Datasheet

PIC16F84A
DS35007C-page 56  2001-2013 Microchip Technology Inc.
FIGURE 9-7: CLKOUT AND I/O TIMING
TABLE 9-3: CLKOUT AND I/O TIMING REQUIREMENTS
OSC1
CLKOUT
I/O Pin
(Input)
I/O Pin
(Output)
Q4
Q1
Q2 Q3
10
13
14
17
20, 21
22
23
19
18
15
11
12
16
old value
new value
Note: All tests must be done with specified capacitive loads (Figure 9-5) 50 pF on I/O pins and CLKOUT.
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
10 TosH2ckL OSC1 to CLKOUT Standard — 15 30 ns (Note 1)
10A Extended (LF) — 15 120 ns (Note 1)
11 TosH2ckH OSC1 to CLKOUT Standard — 15 30 ns (Note 1)
11A Extended (LF) — 15 120 ns (Note 1)
12 TckR CLKOUT rise time Standard — 15 30 ns (Note 1)
12A Extended (LF) — 15 100 ns (Note 1)
13 TckF CLKOUT fall time Standard — 15 30 ns (Note 1)
13A Extended (LF) — 15 100 ns (Note 1)
14 TckL2ioV CLKOUT  to Port out valid — — 0.5T
CY +20 ns (Note 1)
15 TioV2ckH Port in valid before
CLKOUT 
Standard 0.30T
CY + 30 — — ns (Note 1)
Extended (LF) 0.30T
CY + 80 — — ns (Note 1)
16 TckH2ioI Port in hold after CLKOUT  0——ns(Note 1)
17 TosH2ioV OSC1 (Q1 cycle) to
Port out valid
Standard — — 125 ns
Extended (LF) — — 250 ns
18 TosH2ioI OSC1 (Q2 cycle) to Port
input invalid (I/O in hold time)
Standard 10 — — ns
Extended (LF) 10 — — ns
19 TioV2osH Port input valid to OSC1
(I/O in setup time)
Standard -75 — — ns
Extended (LF) -175 — — ns
20 TioR Port output rise time Standard — 10 35 ns
20A Extended (LF) — 10 70 ns
21 TioF Port output fall time Standard — 10 35 ns
21A Extended (LF) — 10 70 ns
22 T
INP INT pin high
or low time
Standard 20 — — ns
22A Extended (LF) 55 — — ns
23 T
RBP RB7:RB4 change INT
high or low time
Standard TOSC§— — ns
23A Extended (LF) T
OSC§— — ns
† Data in "Typ" column is at 5.0V, 25C unless otherwise stated. These parameters are for design guidance only and are not tested.
§ By design.
Note 1: Measurements are taken in RC mode where CLKOUT output is 4 x T
OSC.