PIC16F870_13 Datasheet, PDF (128/172 Pages) Microchip Technology – 28/40-Pin, 8-Bit CMOS FLASH Microcontrollers

PIC16F870/871
FIGURE 14-5:
CLKO AND I/O TIMING
OSC1
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
Q3
11
12
16
New Value
TABLE 14-2: CLKO AND I/O TIMING REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ†
Max
Units Conditions
10*
TosH2ckL OSC1 to CLKO
—
75
200
ns
11*
TosH2ckH OSC1 to CLKO
—
75
200
ns
12*
TckR
CLKO rise time
—
35
100
ns
13*
TckF
CLKO fall time
—
35
100
ns
14*
TckL2ioV CLKO to Port out valid
—
— 0.5 TCY + 20 ns
15*
TioV2ckH Port in valid before CLKO
TOSC + 200 —
—
ns
16*
TckH2ioI Port in hold after CLKO
0
—
—
ns
17*
TosH2ioV OSC1 (Q1 cycle) to Port out valid
—
100
255
ns
18*
TosH2ioI OSC1 (Q2 cycle) to Port input Standard (F)
100
—
—
ns
invalid (I/O in hold time)
Extended (LF)
200
—
—
ns
19*
TioV2osH Port input valid to OSC1(I/O in setup time)
0
—
—
ns
20*
TIOR
Port output rise time
Standard (F)
—
10
40
ns
Extended (LF)
—
—
145
ns
21*
TIOF
Port output fall time
Standard (F)
—
10
40
ns
Extended (LF)
—
—
145
ns
22††* TINP
INT pin high or low time
TCY
—
—
ns
23††* TRBP
RB7:RB4 change INT high or low time
TCY
—
—
ns
Note
* 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.
1: Measurements are taken in RC mode where CLKO output is 4 x TOSC.
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
DS30569C-page 128
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