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PIC18F4539 Datasheet, PDF (273/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel | |||
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PIC18FXX39
FIGURE 23-6:
OSC1
CLKO AND I/O TIMING
Q4
Q1
10
CLKO
13
14
I/O Pin
(input)
17
I/O Pin
(output)
Old Value
Note:
20, 21
Refer to Figure 23-4 for load conditions.
Q2
19
18
15
Q3
11
12
16
New Value
TABLE 23-6: CLKO AND I/O TIMING REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min
Typ
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 CLKO â
0.25 TCY + 25 â
â
ns (Note 1)
16
TckH2ioI Port in hold after CLKO â
0
â
â
ns (Note 1)
17
TosH2ioV OSC1â (Q1 cycle) to Port out valid
â
50
150
ns
18
TosH2ioI OSC1â (Q2 cycle) to Port PIC18FXXXX
100
â
â
ns
18A
input invalid (I/O in hold time) PIC18LFXXXX
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
PIC18FXXXX
â
10
25
ns
20A
PIC18LFXXXX
â
â
60
ns VDD = 2V
21
TioF
Port output fall time
PIC18FXXXX
â
10
25
ns
21A
PIC18LFXXXX
â
â
60
ns VDD = 2V
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
24â â TRCP
RC7:RC4 change INT high or low time
20
ns
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.
 2002 Microchip Technology Inc.
Preliminary
DS30485A-page 271
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