
PIC16F84A
DS35007B-page 58
 2001 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
—
0.5TCY +20
ns
(Note 1)
15
TioV2ckH Port in valid before
CLKOUT
↑
Standard
0.30TCY + 30
—
ns
(Note 1)
Extended (LF)
0.30TCY + 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
TINP
INT pin high
or low time
Standard
20
—
ns
22A
Extended (LF)
55
—
ns
23
TRBP
RB7:RB4 change INT
high or low time
Standard
TOSC§—
—
ns
23A
Extended (LF)
TOSC§—
—
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 TOSC.