PIC16F87_05 Datasheet, PDF (182/228 Pages) Microchip Technology – 18/20/28-Pin Enhanced Flash Microcontrollers with nanoWatt Technology

PIC16F87/88
FIGURE 18-5:
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 18-3 for load conditions.
Q2
19 ¹⁸
15
Q3
11
12
16
New Value
TABLE 18-4: CLKO AND I/O TIMING REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Typ†
Max
Units Conditions
10*
TosH2ckL OSC1 ↑ to CLKO ↓
—
75
200
ns (Note 1)
11*
TosH2ckH OSC1 ↑ to CLKO ↑
—
75
200
ns (Note 1)
12*
TckR
CLKO Rise Time
—
35
100
ns (Note 1)
13*
TckF
CLKO Fall Time
—
35
100
ns (Note 1)
14*
TckL2ioV CLKO ↓ to Port Out Valid
—
— 0.5 TCY + 20 ns (Note 1)
15*
TioV2ckH Port In Valid before CLKO ↑
TOSC + 200 —
—
ns (Note 1)
16*
TckH2ioI Port In Hold after CLKO ↑
0
—
—
ns (Note 1)
17*
TosH2ioV OSC1 ↑ (Q1 cycle) to Port Out Valid
—
100
255
ns
18*
TosH2ioI OSC1 ↑ (Q2 cycle) to PIC16F87/88
Port Input Invalid (I/O in _PIC16LF87/88
hold time)
100
—
—
ns
200
—
—
ns
19*
TioV2osH Port Input Valid to OSC1 ↑ (I/O in setup time)
0
—
—
ns
20*
TIOR
Port Output Rise Time PIC16F87/88
—
10
40
ns
PIC16LF87/88
—
—
145
ns
21*
TIOF
Port Output Fall Time PIC16F87/88
—
10
40
ns
PIC16LF87/88
—
—
145
ns
22††* TINP
INT Pin High or Low Time
TCY
—
—
ns
23††* TRBP
RB7:RB4 Change INT High or Low Time
TCY
—
—
ns
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
†† 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.
DS30487C-page 180
 2005 Microchip Technology Inc.