PIC18LF448T-I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF448T-I/SP

28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

Microchip Technology 

PIC18FXX8

TABLE 27-7: PLL CLOCK TIMING SPECIFICATIONS (VDD = 4.2 TO 5.5V)

Param No. Sym

Characteristic

Min

Typ†

Max Units Conditions

—

FOSC Oscillator Frequency Range

4

—

10

MHz HS mode only

—

FSYS On-Chip VCO System Frequency

16

—

40

MHz HS mode only

—

trc PLL Start-up Time (Lock Time)

—

ΔCLK CLKO Stability (Jitter)

—

—

2

ms

-2

—

+2

%

† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

FIGURE 27-7:

OSC1

CLKO AND I/O TIMING

Q4

Q1

10

Q2

Q3

11

CLKO

13

14

19 18

I/O Pin

(Input)

17

15

I/O Pin

(Output)

Old Value

20, 21

Note: Refer to Figure 27-5 for load conditions.

12

16

New Value

TABLE 27-8: CLKO AND I/O TIMING REQUIREMENTS

Param No. Symbol

Characteristic

Min

Typ

Max Units Conditions

10

TosH2ckL OSC1 ↑ to CLKO ↓

—

75

200

ns

(1)

11

TosH2ckH OSC1 ↑ to CLKO ↑

—

75

200

ns

(1)

12

TckR

CLKO Rise Time

—

35

100

ns

(1)

13

TckF

CLKO Fall Time

—

35

100

ns

(1)

14

TckL2ioV CLKO ↓ to Port Out Valid

—

— 0.5 TCY + 20 ns

(1)

15

TioV2ckH Port In Valid before CLKO ↑

0.25 TCY + 25 —

—

ns

(1)

16

TckH2ioI Port In Hold after CLKO ↑

0

—

—

ns

(1)

17

TosH2ioV OSC1 ↑ (Q1 cycle) to Port Out Valid

—

50

150

ns

18

TosH2ioI OSC1 ↑ (Q2 cycle) to Port PIC18FXX8

100

—

—

ns

18A

Input Invalid (I/O in hold time) PIC18LFXX8

200

—

—

ns

19

TioV2osH Port Input Valid to OSC1 ↑ (I/O in setup time)

0

—

—

ns

20

TIOR

Port Output Rise Time

PIC18FXX8

—

10

25

ns

20A

PIC18LFXX8

—

—

60

ns

21

TIOF

Port Output Fall Time

PIC18FXX8

—

10

25

ns

21A

PIC18LFXX8

—

—

60

ns

22†

TINP

INT pin High or Low Time

TCY

—

—

ns

23†

TRBP

RB7:RB4 Change INT High or Low Time

TCY

—

—

ns

24†

TRCP

RC7:RC4 Change INT High or Low Time

20

—

—

ns

† These parameters are asynchronous events not related to any internal clock edges.

Note 1: Measurements are taken in RC mode where CLKO pin output is 4 x TOSC.

DS41159E-page 344

© 2006 Microchip Technology Inc.

Share Link: