
PIC17C4X
DS30412C-page 156
1996 Microchip Technology Inc.
Applicable Devices 42 R42 42A 43 R43 44
FIGURE 17-3: CLKOUT AND I/O TIMING
TABLE 17-3:
CLKOUT AND I/O TIMING REQUIREMENTS
Parameter
No.
Sym
Characteristic
Min
Typ
Max
Units
Conditions
10
TosH2ckL
OSC1
↑ to CLKOUT↓
—
15
30
ns
Note 1
11
TosH2ckH
OSC1
↑ to CLKOUT↑
—
15
30
ns
Note 1
12
TckR
CLKOUT rise time
—
5
15
ns
Note 1
13
TckF
CLKOUT fall time
—
5
15
ns
Note 1
14
TckH2ioV
CLKOUT
↑ to Port out valid
—
0.5TCY + 20
ns
Note 1
15
TioV2ckH
Port in valid before CLKOUT
↑
0.25TCY + 25
—
ns
Note 1
16
TckH2ioI
Port in hold after CLKOUT
↑
0
—
ns
Note 1
17
TosH2ioV
OSC1
↑ (Q1 cycle) to Port out valid
—
100
ns
20
TioR
Port output rise time
—
10
35
ns
21
TioF
Port output fall time
—
10
35
ns
22
TinHL
INT pin high or low time
25 *
—
ns
23
TrbHL
RB7:RB0 change INT high or low time
25 *
—
ns
*
These parameters are characterized but not tested.
Data in "Typ" column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not
tested.
These parameters are for design guidance only and are not tested, nor characterized.
Note 1:
Measurements are taken in EC Mode where OSC2 output = 4 x TOSC = TCY.
OSC1
OSC2
I/O Pin
(input)
I/O Pin
(output)
Q4
Q1
Q2
Q3
10
13
14
17
20, 21
22
23
15
11
12
16
old value
new value
In EC and RC modes only.