PIC17C75X Datasheet, PDF (233/320 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers

PIC17C75X
FIGURE 20-3: CLKOUT AND I/O TIMING
Q4
Q1
Q2
Q3
OSC1
OSC2 †
I/O Pin
(input)
I/O Pin
(output)
old value
† In EC and RC modes only.
10
13
14 ₁₉
22
23
18
17
15
20, 21
11
12
16
new value
TABLE 20-3: CLKOUT AND I/O TIMING REQUIREMENTS
Param.
No. Sym
Characteristic
Min
Typ†
Max
Units Conditions
10
11
12
13
14
15
16
17
18
19
20
21
22
23
*
†
‡
Note 1:
TosL2ckL OSC1↓ to CLKOUT↓
—
15 ‡
30 ‡
ns
Note 1
TosL2ckH OSC1↓ to CLKOUT↑
—
15 ‡
30 ‡
ns
Note 1
TckR
CLKOUT rise time
—
5‡
15 ‡
ns
Note 1
TckF
CLKOUT fall time
—
5‡
15 ‡
ns
Note 1
TckH2ioV CLKOUT ↑ to Port PIC17CXXX
out valid
PIC17LCXXX
—
— 0.5TCY + 20 ‡ ns
Note 1
—
— 0.5TCY + 50 ‡ ns
Note 1
TioV2ckH Port in valid before PIC17CXXX
CLKOUT↑
PIC17LCXXX
0.25TCY + 25 ‡ —
—
ns
Note 1
0.25TCY + 50 ‡ —
—
ns
Note 1
TckH2ioI Port in hold after CLKOUT↑
0‡
—
—
ns
Note 1
TosL2ioV OSC1↓ (Q1 cycle) to Port out valid
—
—
100 ‡
ns
TosL2ioI
OSC1↓ (Q2 cycle) to Port input invalid
(I/O in hold time)
0‡
—
—
ns
TioV2osL Port input valid to OSC1↓
(I/O in setup time)
30 ‡
—
—
ns
TioR
Port output rise time
—
10 ‡
35 ‡
ns
TioF
Port output fall time
—
10 ‡
35 ‡
ns
TinHL
INT pin high or low time
25 *
—
—
ns
TrbHL
RB7:RB0 change INT high or low time
25 *
—
—
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 for design guidance only and are not tested, nor characterized.
Measurements are taken in EC Mode where CLKOUT output is 4 x TOSC.
© 1997 Microchip Technology Inc.
Preliminary
DS30264A-page 233