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PIC16F72-E Datasheet, PDF (97/136 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH Microcontoller with A/D Converter | |||
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FIGURE 14-5:
OSC1
CLKO AND I/O TIMING
Q4
Q1
10
CLKO
I/O Pin
(Input)
13
14
17
I/O Pin
(Output)
Old Value
20, 21
Note: Refer to Figure 14-3 for load conditions.
Q2
19 18
15
PIC16F72
Q3
11
12
16
New Value
TABLE 14-2: CLKO AND I/O TIMING REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Typâ
Max
Units Conditions
10* TosH2ckL OSC1â to CLKOâ
â
75
200
ns (Note 1)
11* TosH2ckH OSC1â to CLKOâ
â
75
200
ns (Note 1)
12* TckR
CLKO rise time
â
35
100
ns (Note 1)
13* TckF
CLKO fall time
â
35
100
ns (Note 1)
14* TckL2ioV CLKOâ to Port out valid
â
â 0.5 TCY + 20 ns (Note 1)
15* TioV2ckH Port in valid before CLKOâ
TOSC + 200 â
â
ns (Note 1)
16* TckH2ioI Port in hold after CLKOâ
0
â
â
ns (Note 1)
17* TosH2ioV OSC1â (Q1 cycle) to Port out valid
â
100
255
ns
18* TosH2ioI OSC1â (Q2 cycle) to
Standard (F)
Port input invalid (I/O in Extended (LF)
hold time)
100
â
â
ns
200
â
â
ns
19* TioV2osH Port input valid to OSC1â (I/O in setup time)
0
â
â
ns
20* TioR
Port output rise time
Standard (F)
â
10
40
ns
Extended (LF)
â
â
145
ns
21* TioF
Port output fall time
Standard (F)
â
10
40
ns
Extended (LF)
â
â
145
ns
22â â * TINP
INT pin high or low time
TCY
â
â
ns
23â â * TRBP
RB7:RB4 change INT high or low time
TCY
â
â
ns
* These parameters are characterized but not tested.
â Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
â â These parameters are asynchronous events, not related to any internal clock edges.
Note 1: Measurements are taken in RC mode, where CLKO output is 4 x TOSC.
© 2007 Microchip Technology Inc.
DS39597C-page 95
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