|
PIC18F2X1X_07 Datasheet, PDF (335/378 Pages) Microchip Technology – 28/40/44-Pin Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology | |||
|
◁ |
PIC18F2X1X/4X1X
FIGURE 25-7:
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 25-5 for load conditions.
Q2
19
18
15
Q3
11
12
16
New Value
TABLE 25-9: CLKO AND I/O TIMING REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Typ
Max Units Conditions
10 TosH2ckL OSC1 â to CLKO â
â
75
200
ns (Note 1)
11
TosH2ckH OSC1 â to CLKO â
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 CLKO â 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 OSC1 â (Q1 cycle) to Port Out Valid
â
50
150
ns
18 TosH2ioI OSC1 â (Q2 cycle) to PIC18FXXXX
100
â
â
ns
18A
Port Input Invalid
PIC18LFXXXX
200
â
â
ns VDD = 2.0V
(I/O in hold time)
19 TioV2osH Port Input Valid to OSC1 â (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 = 2.0V
21 TioF
Port Output Fall Time PIC18FXXXX
â
10
25
ns
21A
PIC18LFXXXX
â
â
60
ns VDD = 2.0V
22â TINP
INTx pin High or Low Time
TCY
â
â
ns
23â TRBP
RB7:RB4 Change INTx High or Low Time
TCY
â
â
ns
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.
Preliminary
DS39636C-page 333
|
▷ |