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PIC17C44 Datasheet, PDF (156/241 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller | |||
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PIC17C4X
Applicable Devices 42 R42 42A 43 R43 44
FIGURE 17-3: CLKOUT AND I/O TIMING
Q4
OSC1
OSC2 â
I/O Pin
(input)
I/O Pin
(output)
old value
Q1
10
13
14
17
Q2
22
23
15
Q3
11
12
16
new value
â In EC and RC modes only.
20, 21
TABLE 17-3: CLKOUT AND I/O TIMING REQUIREMENTS
Parameter
No.
Sym
Characteristic
Min
Typâ Max Units Conditions
10
TosH2ckL OSC1â to CLKOUTâ
â
15 â¡
30 â¡
ns
Note 1
11
TosH2ckH OSC1â to CLKOUTâ
â
15 â¡
30 â¡
ns
Note 1
12
TckR
CLKOUT rise time
â
5â¡
15 â¡
ns
Note 1
13
TckF
CLKOUT fall time
â
5â¡
15 â¡
ns
Note 1
14
TckH2ioV CLKOUTâ to Port out valid
â
â 0.5TCY + 20â¡ ns
Note 1
15
TioV2ckH Port in valid before CLKOUTâ
0.25TCY + 25 â¡ â
â
ns
Note 1
16
TckH2ioI Port in hold after CLKOUTâ
0â¡
â
â
ns
Note 1
17
TosH2ioV OSC1â (Q1 cycle) to Port out valid
â
â
100 â¡
ns
20
TioR
Port output rise time
â
10 â¡
35 â¡
ns
21
TioF
Port output fall time
â
10 â¡
35 â¡
ns
22
TinHL
INT pin high or low time
25 *
â
â
ns
23
TrbHL
RB7:RB0 change INT high or low time
25 *
â
â
ns
*
â
â¡
Note 1:
These parameters are characterized but not tested.
Data in "Typ" column is at 5V, 25ËC 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.
Measurements are taken in EC Mode where OSC2 output = 4 x TOSC = TCY.
DS30412C-page 156
© 1996 Microchip Technology Inc.
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